Anti-scatter device, method and system

FIELD: physics.

SUBSTANCE: anti-scatter device for suppressing scattered radiation comprises a plurality of x-ray absorbing layers and a plurality of spacer layers, such that each spacer layer lies between any two of the plurality of x-ray absorbing layers in order to hold each of the plurality of x-ray absorbing layers in a pre-defined orientation. Furthermore, the spacer layer comprises a plurality of open voids to reduce absorption of x-rays incident on at least part of each spacer layer.

EFFECT: higher image resolution.

9 cl, 9 dwg

 

The invention relates to the field of radiography. More specifically, the invention relates to anti-scattering device.

In addition, the invention relates to a method of manufacturing anti-scattering device.

The invention relates to the use of anti-scattering device.

Anti-scattering device are typically removable devices, which are fixed on the measuring end of the device for producing x-ray images. Anti-scattering device, usually located between the object and the x-ray detector, it is mainly used for removing background dimness or loss of contrast in the resulting x-ray image, which are caused by scattered radiation. These anti-scattering device is designed in such a way that they selectively transmit the primary and attenuated x-ray radiation passing through the object during the process of image formation, and absorb or prevent the passage of scattered radiation. Typical anti-scattering device contains a matrix (a set of identical elements) of a material absorbing x-ray radiation, separated from each other by a dividing material. The elements of a matrix made of a material absorbing x-ray radiation is the group of which is usually a lead, is oriented at predetermined angles, which are defined relative to a particular system for producing x-ray images. Separation material is located so as to provide mechanical stability of the anti-scattering grid and also to prevent changes in the orientation of the elements of material absorbing x-ray radiation. However, when using the anti-scattering device levels the average power of x-ray radiation should be increased. This is required because of the increased x-ray absorption material absorbing x-ray radiation. Therefore, the dose of x-ray radiation received by the patient during the procedure of image formation increases when using anti-scattering grid.

An embodiment of the anti-scattering device for radiography is described in U.S. patent V. Described anti-scattering device includes many elements, usually absorbing radiation, and many elements usually do not absorb radiation. Many elements, usually absorb radiation, includes many voids, and it is desirable that the elements do not absorb radiation, comprised of epoxy or polymer material and the multitude of hollow microspheres in Addition, the document describes a device for forming anti-scattering device, where the device includes a rotary arm and the surface for use in aligning multiple spaced and generally absorbing the radiation elements relative to the radiation source.

When using the described method to produce anti-scattering device becomes expensive and difficult. This is due to special requirements, including the presence of many of the microspheres in the material, usually not absorbing the radiation. In addition, it is possible that some of these microspheres or they will all eventually break down, which will cause the change of the absorption and lack of absorption of the scattered radiation in the anti-scattering device. This leads to the deterioration of the resolution of the formed image.

Therefore, the aim of the present invention is to provide anti-scattering device, which provides superior image resolution. In the invention described in item 1 of the claims, creates anti-scattering device to achieve this goal. In addition, preferential options for the implementation of anti-scattering device defined in paragraphs 2-4.

Another aim of the invention is to provide a method of manufacturing underseepage the device, described in paragraph 5. Paragraphs 6-8 oharakterizovat additional preferential embodiments of the method of manufacture.

Another purpose of the invention is to provide methods of using anti-scattering device, described in item 9.

The first aspect of the invention discloses a typical anti-scattering device for suppressing scattered radiation. As explained here above, the use of the term "radiation" in this context must refer to the x-ray radiation. Anti-scattering device contains multiple layers that absorb x-rays. In addition, the anti-scattering device contains many of the separation layer, so that each spacer layer is located between any two of the multiple layers that absorb x-ray radiation for each of the multiple layers that absorb x-ray radiation, kept a preset orientation. Also, each of the multiple barrier layers contains many open voids to reduce the absorption of x-rays impinging at least a portion of each of the separation layers. Detailed information about the predefined orientation of the separation layer relative to the layer that absorbs x-rays and the torching, can be found in the previous document, U.S. patent V, which is included in this description by reference.

Many open gaps on each of the separation layers can mainly be used to further reduce the absorption of x-rays incident on each of the separation layers, thereby facilitates the correct detection of x-ray radiation. Another advantage of having multiple open cavities on the separating layers is that reduced dose x-ray irradiation, which receives the object, for example the patient during the procedure of forming x-ray images. In other words, for a given dose of x-ray radiation received by the object, the use of such devices, a variant of which is shown here, helps to get the image with improved resolution. In addition, the device also helps to reduce the radiation dose received by the patient. This is because in the device for forming images using the anti-scattering device, the average power levels higher than when the procedure of image formation, when the anti-scattering device is not used. However, for the specialist in this field is obvious that antitussives the e device are necessary to reduce the effects of scattered radiation, which leads to the deterioration of the resolution of the resulting image.

In yet another variant of the invention the separating layer in the anti-scattering device comprises a fiber material. The fiber material may preferably be used due to the fact that facilitated the formation of many voids, especially when mechanical and/or optical means are used to form multiple cavities and also due to the fact that facilitated the formation of composite strips. For example, in one embodiment, the implementation of the fiber material may be of vegetable fibre material such as paper from cotton material.

In accordance with another variant of realization of the invention describes a method of manufacturing anti-scattering device for suppressing scattered radiation. The method includes applying a first binder on the first surface of the isolating material. The method also includes attaching at least a layer of a material absorbing x-ray radiation to the second surface of the separation material using a second binder material to form a composite foil. The method also includes forming multiple open cavities, at least part of each of the separation material. Also the way the content is t the formation of many composite strips of the composite foil and overlap one composite strip to the other for each of the set of composite strips. Furthermore, the method includes heating the superimposed composite strips to activate the first binding material, for fixing a variety of composite strips in a given orientation. One of the advantages of anti-scattering device is that it is inexpensive to manufacture, as it involves very little modification of existing manufacturing processes of the anti-scattering bars that are available in real time, while providing improved resolution of the resulting image when used in conjunction with a device that generates x-ray image.

Separation material typically absorbs x-ray radiation to a lesser extent compared to the absorbing material. As described above, the separator material is used between all elements of the material absorbing x-ray radiation, to maintain a given orientation of the material absorbing x-ray radiation. Separation material is typically a fiber material. For example, in some embodiments of the separator material may be, for example, the type of paper or material, like paper. However, a suitable material such as plastic or any other material which usually does not absorb x-ray radiation, can be used instead and should R smotriatsa in the framework of the invention. Other required properties of isolating material, not related to the ability to absorb x-rays in a possibly lesser extent, is the ability to provide mechanical stability with respect to the device and does not deteriorate over time.

The first binder material is applied on the first surface of the isolating material. For example, as a first binder material can be used to glue on the basis of shellac. The first binder material is selected so that it can be activated by heating at any desired point in time.

Material absorbing x-ray radiation, is attached to the second surface of the separation material using a second binder material. Material absorbing x-ray radiation, is located so as to absorb any scattered radiation, i.e. any weak x-ray radiation, which does not contribute to obtaining the true image. It should be noted that, when the x-ray radiation passes through the object, a large part of the radiation is attenuated and passes through the object along the same direction which has been incident rays. However, some x-rays passing through the object change direction due to scattering. In some cases, the energy of x who's radiation can be reduced. These rays are called scattered radiation, which is a form of secondary radiation.

The design of the separation layer, having the first binder and the second binder material on both sides, and the absorbing layer attached to the separation layer using a second binding material called composite foil. Before the formation of the composite foil plenty of open voids is formed on the separating layer. It should be noted that many open voids can be formed on the separating layer at any time before the formation of the composite foil. At that time, as the layer of isolating material usually does not absorb the radiation, some radiation will be absorbed separation material. The formation of open voids in each layer of isolating material, in addition, reduces the absorption of x-rays of the separation material.

The composite foil is then cut into a variety of composite strips. After the composite strip are received, they are superimposed on top of one another. It should be noted that when the overlay layer of each composite strip, absorbing x-ray radiation, will be in contact with the first bonding material adjacent composite strips. In addition, it should be obvious that, despite the first and second binder material, each layer of material absorbing x-ray radiation, essentially concluded as a sandwich between layers of separator material and Vice versa. As described herein above, the function of each layer of isolating material includes providing the possibility of passing primary and attenuated x-ray radiation, providing mechanical stability with respect to the device, as well as saving each layer of material absorbing x-ray radiation in a given orientation.

After forming the set superimposed on other bands, it is heated to activate the first binding material, so that each composite strip in the set of bonds with neighboring composite strip, resulting in the device.

In yet another variant of the invention the method comprises the formation of many open gaps on the separation material before applying the first bonding material. The advantage of forming multiple cavities on the separating material, therefore, is that it facilitates the processing of isolating material.

In another embodiment of the invention the method comprises the formation of numerous voids in the separation material before the formation of the composite foil, but the pic is E. applying a first binder material. The advantage of the formation of numerous voids in the separation layer after application of the first binding material, but before the formation of the composite foil is that the tabs do not appear the first binder material in the separation material at the interface with the material absorbing x-rays.

In yet another variant implementation of the invention, the method includes forming multiple open cavities with at least one of mechanical means, chemical means or optical means.

In a variant of realization of the mechanical means may include a device configured to punch holes in the separation material. In other embodiments of the mechanical means may include a device for drilling or device for sawing. In yet another implementation may apply chemicals to the formation of numerous voids in the separation material using etching technology, known in the prior art. In another embodiment, the implementation of many of the voids may also be formed in the separation material using optical means such as high-intensity lasers. It should be noted that the choice of mechanical, chemical or optical means for forming the plural is of holes depends on the size, forms open voids to be formed, as well as from the separation material. The advantage of the formation of the open voids in the separation material is that it allows you to better control the formation of voids. In some embodiments of open voids can be formed in a manner that allows voids of different sizes located at different sites along the barrier material depending on the requirements.

In accordance with another aspect of the present invention describes a typical way of using anti-scattering device for suppressing scattered radiation in the device for data collection. The method includes the creation of the anti-scattering device for attachment to the surface of the contact device to collect data, whereby the contact surface is located so as to receive through the device, at least part of the emitted x-ray radiation. Anti-scattering device contains multiple layers that absorb x-rays located at the predetermined orientation, and many of the separation layer, so that each spacer layer is located between any two of the multiple layers that absorb x-ray radiation in order to save sets of the layers, absorbing x-ray radiation in a given orientation. In addition, each of the separation layer contains many cavities, arranged in such a way as to decrease the absorption of x-rays impinging at least a portion of each of the multiple barrier layers.

These and other aspects of the invention will become apparent and will be explained with reference to the embodiments, described below, as shown on the following drawings.

Figure 1 represents a three-dimensional schematic representation of a typical arrangement of the various layers for the formation of the composite foil;

figure 2 is a schematic representation of the set of composite strips, and each strip contains a layer that absorbs x-ray radiation, the separation layer, the first binder and the second binder material;

figure 3 is a schematic representation of a typical system for producing x-ray images containing anti-scattering device;

figure 4 is a schematic representation of a typical separation layer having numerous voids;

figure 5 is a schematic view of another typical separation layer having numerous voids;

6 is a schematic representation of another typical razdelitel the layer, having many voids;

7 is also a schematic representation of a typical separation layer having numerous voids;

Fig illustrates a typical method of manufacturing the anti-scattering device for selective transmission of x-ray radiation; and

Fig.9 illustrates another typical method of manufacturing the anti-scattering device for selective transmission of x-rays.

Refer now to the drawings, referring first to figure 1, which illustrates the location of the composite foil 100, which forms and shapes the anti-scattering device for selective passage of x-rays. Composite foil 100 contains a layer 110 of a material absorbing x-ray radiation, the layer 120 of the separation material layer 130 of the first binder material and a layer 140 of the second binding material. In addition, as stated earlier, the layer 120 of isolating material contains many voids, in General denoted by the reference 150.

A layer 110 of a material absorbing x-ray radiation, usually can be a lead. However, with the development of technology or any suitable material that absorbs x-ray radiation, may be used instead of lead to achieve the same functionality, and Taka the substitution will be allowed in the framework of the invention, as described here. In some other embodiments of the layer 110 of a material absorbing x-ray radiation, may also consist of a combination of two or more materials that absorb x-rays.

Although this drawing illustrates how many cavities 150 are oriented along an axis of the layer 120 of isolating material, i.e. along the wider surface of the layer 120 of isolating material, it should be noted that in some other embodiments of the invention numerous voids 150 may be positioned in accordance with any other orientation on the plane of the layer 120 of isolating material. In other words, many voids 150 may be formed along a wider surface layer 120 isolating material. However, with all the discussions here below, will be considered the first option is the location of many cavities 150. A detailed discussion of many of the voids will be presented in the parts of the descriptions that follow here below.

The first binder material 130 has a property, consisting in the fact that after application it can be activated by heating, at any later point in time. An example of such a bonding material is an adhesive-based shellac. In one typical embodiment of the invention, the first bonding material 130 nanosims is on one surface of the layer 120 of isolating material, while the second binder material 140 is applied on the opposite surface of the layer 120 of isolating material. The second binder material 140 is located so to attach a layer 110 of a material absorbing x-ray radiation, the layer 120 of isolating material. The second binder material 140 may not have properties, which makes it possible to activate it at a later point in time. The task of the second bonding material 140 is reliable bonding layer 110 material absorbing x-ray radiation, and a layer 120 of isolating material and holding the two layers (110, 120) in a given orientation relative to each other. An example of a second binder material may be an epoxy adhesive. Preferably, the first binder material 130 and the second bonding material 140 must have the ability to absorb x-ray radiation is so weak as possible.

Here it should be noted that the layer 110 of a material absorbing x-ray radiation, and the layer 120 of isolating material usually must be a foil with an appropriate thickness. Therefore, these above-mentioned layers are placed together, the result is a composite foil 100, having an open layer of the first bonding material 130 on one side, the layer 12 of isolating material, the second layer of binder material 140 and the layer of material 110, absorbing x-ray radiation having an exposed surface on the other side of the composite foil.

Many cavities 150 can be manufactured in a variety of ways with many shapes and sizes. As will be recognized by a skilled specialist, the material of the separation layer must play a significant role in determining how a lot of voids and using some tools. One of the desired properties of the separation layer is that it must provide sufficient mechanical stability in relation to the anti-scattering device and also to have the ability to keep the layers of material absorbing x-ray radiation in the desired and predetermined orientation. This also means that the separating layer should have the ability to not break down over time, because this leads to a change in orientation of the layers of material absorbing x-rays.

Plenty of open voids 150 may be formed by chemical means, mechanical means or optical means and, in some instances, using a combination of one or more of the above-mentioned means. For example, when the separating layer contains fibrous material, such as paper, cotton is Iria, mechanical tools provide a simple way of creating multiple open cavities 150. The mechanical means may include a new invention, which is implemented in such a way as perforating machine, which has a desired depth and shape of the perforation. In addition, the invention can be designed to meet the requirements of different thickness and type of separator material.

In another implementation, multiple open cavities 150 may be formed by chemical means, such as selective chemical etching for forming the desired shape and size of voids. With proper control of the impact on the separation of the material from the different types of solvents or gases, it is possible to adjust the shape and size of voids.

In another implementation, when using such optical devices as lasers, it is possible to generate multiple open cavities 150. The use of lasers has a significant advantage in that the accuracy of many of the voids and the exact geometry of the voids can be easily adjusted and tuned. Usually, when the formation of voids are lasers, they are controlled by a microprocessor, which can be dynamically programmed to form different sizes and shapes PU is the same or can be pre-programmed to meet your specific requirement.

Because parts of the description above, we discussed the formation of many open voids, it should also be noted that the layer of isolating material may, in some implementations contain a lot more thin layers. When the correct and exact location between all layers can be voids, thereby, many voids in the layer of isolating material.

Going back to the discussion of figure 1, the composite foil 100, thus formed, is then cut into many composite strips so that each composite strip has the same layers in cross-section, and that the composite foil. Figure 2 illustrates a sample set, which forms the anti-scattering device 200. Anti-scattering device 200 contains a set of composite strips 210, each composite strip in General marked by a link 210. As will be clear from the previous description, each composite strip will enable layer 215 material absorbing x-ray radiation, a layer 230 of isolating material, a first binder material 220 and the second binding material 240. As will be clear from figure 2, the first layer of binder material 220 in a separate composite band 210 will be in contact with the material layer 215, absorbing x-ray radiation to another composite according to the EfE 210, above her. Thus, when drafting a set of composite strips 210 may be formed in a device for selective transmission of x-rays having the specific size, where each composite strip can be oriented at a selected angle of incidence of x-ray radiation. In particular, it should be noted that once the composite strips are located in a given orientation, the first binder material 220 in each composite band 210 is activated. Activation of the first bonding material 220 may be implemented in different ways. For example, in a variant of realization, when the first binder material 220 is a glue-based shellac, the first binder material 220 may be activated when applying thermal energy to the set of composite strips. Glue-based shellac is activated, and each composite band 210 is attached to the composite strip above it, and form a rigid structure, representing the anti-scattering device, which can be used for selective transmission of x-rays. Also, in particular, it should be noted that as soon as the rigid structure is formed, the orientation of the composite strips may preferably not be changed.

For explanation of the use of this set rassm the trim typical system 300 for producing x-ray images, as shown in figure 3. System 300 for producing x-ray image includes an x-ray source 310, the x-ray detector 320. They are fixed on a movable lever 330 to ensure the mobility of the source 310 and detector 320 over any desired area. System 300 of image formation, in addition, includes table 340 for the patient. It fixed detector 320 x-ray radiation, anti-scattering device 350. Anti-scattering device 350 is a removable unit and is used essentially to eliminate any background dimness or loss of contrast in the obtained x-ray image, which are caused by scattered radiation. Anti-scattering device 350 is always located between the detector 320 x-ray radiation and the object 360, which image is formed and which is located on the table 340 for the patient.

As mentioned earlier, due to the use of anti-scattering device in accordance with various aspects of the present technique, the dose of x-ray radiation that the patient should receive during the process of image formation is greatly reduced and, as will be described, the parts of the description below, as implemented here, the anti-scattering device is also inexpensive. Also neither is it a bad idea what anti-scattering device is normally closed or sealed to ensure its tough and durable outer shell. The use of carbon fiber or carbon composite sealing has the advantage consisting in the fact that the anti-scattering device is transparent to x-rays and does not cause any distortion of x-rays that pass through it. In addition, the distance between the x-ray source and x-ray detector is usually permanent. This is the reason that anti-scattering devices are almost always individual, constructed in accordance with the specific design for each specific system for producing x-ray images. Also because of this, various layers of material absorbing x-ray radiation, and barrier material must be oriented at a selected angle or in a given direction in the formation of the anti-scattering device. This means that specific intrussive device designed for one specific model of the formation of x-ray radiation cannot be used with similar or equal effect in various systems for producing x-ray images.

Figure 4 illustrates one typical embodiment of the layer 400 of isolating material, contains many open voids 450. As shown, a lot of open voids 450, in this case, all located along certain rows and columns. The advantage with this arrangement is that such an arrangement is simple in the formation of many open voids. Figures 5 through 7 illustrate various implementations of the layer 500, 600, 700 barrier material, respectively, and each has a special picture of the location many open voids 550, 650 and 750, respectively. Figure 5 illustrates the many open voids 550, which are round, but are staggered. The advantage of such location in a checkerboard pattern is that a greater number of open voids can be obtained in this area separating material 500. However, care must be taken to ensure that the mechanical rigidity of the separating material and, consequently, the anti-scattering device was not broken.

6 illustrates an embodiment of the isolating material 600, where open voids are elliptical in shape and are located along a particular row and column. Although it is not illustrated, it should be noted that the open emptiness of the elliptical shape also can be an location which are staggered, as illustrated in figure 5 for the case of a circular open voids. Fig.7 illustrates the location of the open voids 750 rectangular shape in a typical implementation of isolating material 700. The advantage of being located in this implementation is that it can be implemented maximum use of space to create open voids 750 in the separation material 700.

At that time, as the previous figures 4 through 7 illustrate various typical embodiments, depicting various forms and location of many open voids in the separation material, it must be admitted that these views should not be construed as limiting. In some embodiments of the separating material can have a combination of one or more forms of implementation options of the open voids or may include some form, not shown here. Such variants to achieve effects similar to those shown here should be considered as being within the scope of this invention.

Fig illustrates a typical method of manufacturing the anti-scattering device. In the illustrated implementation, the method includes applying a first binder on the first surface of the layer of isolating material. The method also includes the AET in the formation of many open voids, at least part of the separating material. Furthermore, the method includes attaching at least a layer of a material absorbing x-ray radiation, on the second surface of the layer of isolating material using a second binder material to form a composite foil. The method includes forming multiple composite strips of the composite foil and overlap one composite strip to another. Finally, the method includes the application of heat (thermal energy) to each composite strip to activate the first bonding material for fixing the set of composite strips with a specified orientation for the formation of the anti-scattering device.

As discussed above, in some embodiments of another typical method of manufacturing the anti-scattering device, as shown in figure 9, may include the formation stage of the multiple open cavities, at least part of a layer of isolating material before applying the first bonding material on the first surface of the layer of isolating material.

The procedure described variants of the method of the current invention is not obligatory, expert in the art may change the order of stages or underway simultaneously, using fashion and, multi-processor systems or multiple processes without derogating from the ideas of the current invention.

It should be noted that the above-mentioned implementations illustrate more than limited the invention, and that the specialist in the art will be able to design many alternative implementations without departing from the scope of the attached claims. In the claims, any position of the links located in the brackets should not be taken as limiting formula. The word "comprising" does not exclude the presence of elements or steps, other than those listed in the claims. The presence of elements in the singular does not exclude the presence of many such elements. The invention can be implemented using hardware, consisting of several different elements, and using a suitable programmable computer. In the claims, describing the system, lists several tools, some of them can be implemented using the same read operation computer software or hardware. The simple fact that some signs are listed in different dependent claims does not mean that their combination cannot be used to advantage.

1. Anti-scattering device (200, 350) to suppress scattered radiation, comprising:
multiple layers (110, 215), which absorb x-ray radiation; and
many separation layers (120, 230), each of the separation layers is located between any two of the multiple layers (110, 215), which absorb x-rays, in order to hold the multiple layers that absorb x-ray radiation at a predetermined orientation; and a separating layer (120, 230) further comprises:
many open voids (150) in each of the separation layers are formed to reduce the absorption of x-rays impinging at least a portion of each separation layer.

2. Anti-scattering device according to claim 1, wherein a set of open voids (150) is formed by mechanical means, chemical means, optical means, or combinations thereof.

3. Anti-scattering device according to claim 1, in which the separating layer contains at least the fiber material.

4. Anti-scattering device according to claim 1, in which at least one of the multiple layers (215), which absorb x-ray radiation, is connected, at least one of the multiple barrier layers (230) using a binder material.

5. A method of manufacturing anti-scattering device is TBA (200, 350) to suppress scattered radiation, namely, that
put the first binder material (130, 220) on the first surface of the layer of isolating material (120, 230);
attach at least one layer of material (110)absorbing x-ray radiation, the second surface of the layer of isolating material (120, 230) using a second binding material (140) to form a composite foil (100), and the second surface than the first surface;
form many open voids (150), at least part of the barrier material (120, 230);
form the set of composite strips (210) of the composite foil (100);
put each composite strip (210) of the set of composite strips to another composite strip from the set of composite strips;
heat the superimposed composite strip to activate the first binding material (130) and to connect the set of composite strips in a given orientation.

6. A method of manufacturing anti-scattering device according to claim 5, in which form many open voids (150) prior to the application of the appropriate binding material (130, 220).

7. A method of manufacturing anti-scattering device according to claim 5, in which form many open voids (150) before the formation of the composite foil, but after applying the first svetousileniya (130, 220).

8. A method of manufacturing anti-scattering device according to claim 5, in which process the layer of isolating material (120, 230) using at least one of mechanical means, chemical means or optical means for forming multiple open cavities (150).

9. The use of anti-scattering device (200, 350) to suppress scattered radiation in the system (300) for producing x-ray images, namely, that
provide anti-scattering device (350) to attach to the surface of contact of the formation of the x-ray image, and the contact surface is configured to accept at least part of the x-ray radiation emitted by the system is producing x-ray images, using the anti-scattering device, the anti-scattering device further comprises:
multiple layers (215), which absorb x-ray radiation, located with a given orientation;
many of the separation layer (230), each of the separation layer is located between any two of the multiple layers that absorb x-ray radiation, thus to hold the multiple layers that absorb x-ray radiation at a predetermined orientation;
each separation layer contains:
many who has open voids (150), made with the ability to reduce the absorption of x-rays impinging at least a portion of each of the multiple barrier layers.



 

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The invention relates to the field of technology collimators used in gamma cameras and other radiation devices

FIELD: optics.

SUBSTANCE: proposed process includes layer-by-layer cross-linking of photopolymerizing molecules by means of focused optical radiation to produce spatially confined X-ray passages disposed within X-ray absorbing material. To this end X-ray absorbing material is added in advance to photopolymerized material, and collimator space, except for X-ray passages, is cross-linked using photochemical method.

EFFECT: enhanced spatial resolution and convergence of spatially confined X-ray passages into single point; reduced cost of process.

3 cl

Radiation head // 2293387

FIELD: radiation engineering; devices for controlling particle flux or electromagnetic radiation using collimator for the purpose.

SUBSTANCE: proposed radiation head has radiation source holder installed in fixed housing made of absorbing material with biological-shield wicket gate joined with its cylindrical sliding surface and labyrinth collimating surface which form ball in closed position; wicket gate pivot is located in center of cylindrical surface of housing. In addition, set of filters separately mounted in stepped spline guides of housing is attached radially relative to common pivot, butt-ends of filters being congruent to housing collimating channel surface; holder is provided with blind pocket in butt-end opposite to source which has through slit to receive telescopic lock damper; the latter is mounted on rod whose spring-loaded flange is loosely mounted inside supporting grip; each filter is separately secured on double-arm positioning lever.

EFFECT: enlarged capabilities of dosing radiation power, enhanced radiation safety in head servicing and storage.

3 cl, 4 dwg

FIELD: collimation and calibration devices for container inspection systems.

SUBSTANCE: the device has a collimation unit (1), calibration unit (2), fundamental plate (15), motor (4) and a great number of bearing unit (13) that are fastened on the fundamental plate (15), transfer assembly (5, 8,10) coupled to the motor outlet end for transfer of the motor motion to the bearing plate (11) characterized by the fact that the device additionally has a sliding plate (12), stationary plate (3) installed on the sliding plate and rigidly coupled to the sliding plate (12), the collimation unit (1) and calibration unit (2) are installed on the stationary plate (3) so as to make up an integrated construction, the aggregate clearance (9) is formed between the collimation unit (1) and the calibration unit (2), as a result, the collimation unit (1) and the calibration unit (2) on the stationary plate (3) are actuated by assembly (5, 8, 10) and bearing plate (11) for integrated motion.

EFFECT: expanded functional potentialities, reduced dimensions and weight.

14 cl, 2 dwg

FIELD: physics.

SUBSTANCE: capillary neutron-optical system consists of in line with the optical axis of the system, a neutron source, input collimator, polycapillary lens, and an output collimator. The input part of the polycapillary lens, directed on the neutron source, has a true focus between the input part of the polycapillary lens and the neutron source. The opening of the input collimator is in form of two flattened cones, the small bases of which coincide and are in the focal plane of the input part of the polycapillary lens. The radius of the opening of the input collimator adjacent to the neutron source is equal to the radius of the neutron source. The radius of the opening of the input collimator, adjacent to the polycapillary lens, is equal to the radius of the input part of the polycapillary lens.

EFFECT: obtaining bunches of thermal neutrons with different configurations with minimum halo of background radiation, wider functional capabilities of the capillary neutron-optical system with smaller dimensions of the device, and increased radiation safety.

7 dwg

Collimator // 2366014

FIELD: instrument engineering.

SUBSTANCE: application: for nondestructive control methods. Substance consists that a collimator comprises a truncated pyramid provided with a beam pat shaped as a lateral surface of the truncated pyramid. The smaller base of the collimator directly adjoins an outlet channel of a moderating block made of polyethylene and representing a hollow cube. Inside of the moderating block, there is a converter for a fast neuron source. The space between the converter face and internal surface of the moderating block contains the polyethylene layer that forms a cavity formation. The moderating block on its surface comprises series lead converter-reflector, a bismuth gamma-shield layer, a slow and fast neutron absorption layer. Lengthwise the collimator additionally accommodates series lead shield layer, a slow and fast neutron shield layer and gamma-shield layer. Gadolinium and cadmium interlayers are provided between shield layers.

EFFECT: higher slow neuron flux density.

3 cl, 7 dwg

FIELD: physics.

SUBSTANCE: anti-scatter device for suppressing scattered radiation comprises a plurality of x-ray absorbing layers and a plurality of spacer layers, such that each spacer layer lies between any two of the plurality of x-ray absorbing layers in order to hold each of the plurality of x-ray absorbing layers in a pre-defined orientation. Furthermore, the spacer layer comprises a plurality of open voids to reduce absorption of x-rays incident on at least part of each spacer layer.

EFFECT: higher image resolution.

9 cl, 9 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to apparatuses for generating therapeutic and diagnostic beams of slow and intermediate neutrons of various geometric configurations, spectral distribution and intensity applied in neutron therapy of malignant tumours in human and animals with one nonreconstructible neutron source. The apparatus comprises a research reactor core with its processing environment being a primary neutron source tangential to the research reactor core of an end-to-end experimental channel with a hydrogenous scatterer being a secondary neutron source and symmetrical to the research reactor core. The active and/or inactive neutron-optical systems (NOS) and filters for generating the spectral distributions of the therapeutic and diagnostic neutron beams are integrated in the channel on both sides of the hydrogenous scatterer.

EFFECT: use of the invention allows higher NT effectiveness and reduced length of treatment.

3 cl, 4 dwg

FIELD: physics.

SUBSTANCE: first, metal template with curved surface of revolution is made to be fitted into glass tubular blank that is sealed and heated to glass thermoplastic deformation temperature, and said template is withdrawn. After cooling template and glass tubular blank, said glass blank is vertically stretched by mechanical force applied to its bottom end. Heating is performed by moving annular heater along template working surface to its taper section.

EFFECT: preset shape with great difference in cross sections, minor roughness.

6 cl, 2 dwg

FIELD: physics.

SUBSTANCE: method of making a multicapillary collimator for an atomic beam tube involves making perforated metal plates, assembling said plates into a stack and fixing. Said plates are made by electro-forming techniques. Stacking is carried out by sign-matching two or more plates with a transparent polymer, primarily a photoresist, placed in between said plates. The plates are fixed after polymerisation of said polymer by welding each plate with neighbouring plates, after which the polymer is removed and a metal layer is grown by chemical deposition on the surface of the assembly, including the inner surface of through-openings which form capillaries. Plates can be welded to neighbouring plates on two ends inside matching signs on a split-tip welding machine. The polymer is removed by plasma-chemical etching.

EFFECT: making a collimator with capillaries of the required diameter and number with optimum distance in between and improved vertical position thereof and quality of the inner surface.

4 cl

FIELD: physics.

SUBSTANCE: portable X-ray system (200) has sensing means for detecting whether an anti-scatter grid (230) is attached to a portable detector (240) or not. The system is able to automatically change the default exposure settings (265a, 265b, 265c, 265d), when the grid (230) is removed or attached to the portable detector (240).

EFFECT: reducing the risk of under- or over-exposure of the image.

16 cl, 2 dwg

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