Magnetic-resonance visualization using acoustic radiation pressure power

FIELD: physics.

SUBSTANCE: device contains a magnetic-resonance imaging system for magnetic resonance data collection from the subject in the area of visualization, a system of focused high intensity ultrasound, a processor, wherein the execution of commands causes the processor to control the magnetic-resonance imaging system to collect magnetic resonance data using a pulse sequence. The pulse sequence contains a pulse imaging sequence using acoustic radiation force that contains an exciting pulse, a multi-dimensional gradient pulse applied during the radio frequency excitation of an area of interest which is two-dimensional, so the area of interest has a two-dimensional cross section. The two-dimensional cross-section has a rotational symmetry about the axis of the area of interest, wherein the axis of the area of interest and the axis of the beam are coaxial. The area of interest comprises a predetermined volume that encompasses the target zone and at least a portion of the beam axis. The processor also controls the system of focused high-intensity ultrasound for ultrasonic processing of the target zone so that the ultrasonic processing of the target zone occurred during the pulse imaging sequence using the acoustic radiation force and the image obtained using the impact force is reconstructed, using the magnetic-resonance imaging data. In a medical device operating using a computer-readable medium, a method of operating a medical device for magnetic-resonance imaging using the acoustic radiation force is performed.

EFFECT: group of inventions allows to reduce the time of designing the image in real time.

14 cl, 6 dwg

 



 

Same patents:

FIELD: measurement equipment.

SUBSTANCE: invention relates to instrumentation, it is a multichannel device for measurement of spatially inhomogeneous magnetic field and can be used for registration of source data necessary for plotting a magnetic field distribution diagram. The device consists of single-type independent smart modules of instrument channels (SMIC) fitted with wireless optical communication with the control, registration and processing unit, (CRPU). The amount and spatial location of SMICs are pre-set in view of conditions of a specific objective of measurement and registration of magnetic field distribution.

EFFECT: decrease of noise effects at measurement of the magnetic field due to use of optical communication and use of independent power supplies, and also improvement of functionality of the instrument at the expense of possibility of increase of number of measuring channels up to the pre-set one in view of conditions of a specific task with a possibility and pre-setting of individual values of parameters of polling of magnetic field in specific spatial points where the magnetic field is to be measured.

1 dwg

FIELD: medical equipment.

SUBSTANCE: pressure of helium is monitored in cooling circuit. Audio signal of operation of cryogenic system is recorded inside cryostat area. Audio signal is dispersed to spectrum. Relative change of separate spectral components is estimated during some period of time due to comparison of their level with threshold values assigned for cryogenic system. Warning signals on necessity of checking of operation are formed on the base of the changes. Specific components of cryogenic system can be subject to replacement if necessary if levels of excited spectral components exceed specified thresholds.

EFFECT: improved reliability of magnetic-resonance tomography.

6 dwg, 3 ex

The invention relates to a device for indicating and measuring electric and magnetic fields

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FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to devices for ultrasonic cosmetic treatment. A system for aesthetic imaging and treatment comprises a manual probe accommodating a first control unit providing the ultrasonic imaging, a second control unit providing the ultrasonic treatment, a transferring mechanism for directing the ultrasonic treatment of single thermal areas of exposure, and replacement converters. The transferring mechanism comprises a magnetic connector between the manual probe and the first and second converters. A method for performing a cosmetic procedure on an individual is implemented with using the system for aesthetic imaging and treatment. A method for performing the cosmetic treatment is implemented by means of the system for cosmetic treatment comprising a control unit for the ultrasonic treatment function, and the manual probe configured to direct the ultrasonic treatment by providing a linear sequence of the single thermal areas of exposure and comprising at least the first and second replacement converters, each of which comprises a pressurised unit filled with a fluid with an acoustic transparent element, a fluid adhesive and at least one ultrasonic converter.

EFFECT: using the invention enables providing higher effectiveness of the cosmetic treatment.

35 cl, 22 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to therapeutic devices for treating patient with the use of magnetic particles. The above device comprises a first heating unit configured to heat a first patient's area, a first power control unit targeting the first area so that the power is below a threshold, a particle heating unit configured to heat magnetic nanoparticles inside a second patient's area with the use of a time-varying magnetic field. The first area comprises the second area, while the first heating unit is an ultrasonic unit for surrounding tissue heating to a temperature, which is not high enough to cause cell death. The second area comprises at least one hyperthermia area; the above heating area is configured first to increase a temperature of the hyperthermia area. The particle heating unit is configured to heat any magnetic particles additionally inside the second area, thereby increasing a temperature in the hyperthermia area; the ultrasonic heating unit represents a high-intensity focused ultrasound unit. The particle heating unit comprises a magnetic field generation unit; the therapeutic device additionally comprises the second control unit for controlling the particle heating unit, wherein the second control unit is configured to manage the location the second area and to receive patient's treatment planning data.

EFFECT: using the invention provides the higher clinical effectiveness.

7 cl, 7 dwg

FIELD: medicine.

SUBSTANCE: group of inventions refers to medicine, namely to a therapeutic system and a method of monitoring of thermal exposure on a body tissue. The system comprises a MR-visualisation unit configured to read out the MR-signals from the patient's body found in the examined region. Also, the system comprises a thermal exposure unit for localising thermal energy inside the body tissue. A system implements a method of monitoring consisting in the initial thermal exposure by heating the body tissue within a focus to the extent of the examination. Further, the MR-signals are selectively read out from the first image plane with a focus of the thermal exposure found within the first image plane. That is followed by restoring a topographic MR image from the MR signals collected from the first image plane. A basic thermographic MR-image is derived from the thermal distribution within at least one second image different from the first image plane. Thereafter, the focus of the thermal exposure is moved to a new place within the extent of the examination; the first image plane is positioned and/or directed in accordance with the new position of the focus of the thermal exposure.

EFFECT: using the invention provides continuous monitoring of temperature within the MR-thermometry based process, even in the situation when the focus of the thermal exposure moves.

10 cl, 6 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to ablation control. An ablation control device (110) comprises a monitoring section (115) and a control section (120) for recording (S820) with the use of a characteristic curve (515) showing one or more displacements derived by displacement monitoring and real-time ablation termination in an ablation point when reaching the pre-set involvement dimensions. The control section (120) is additionally configured to terminate ablation in the ablation point, once finding and after initiating a peak displacement, a final displacement (420). An ablation apparatus additionally comprises a therapeutic section (105) for ablation generation in the ablation point and force application. A method for the apparatus operation involves real-time monitoring applied to the current ablation point, displacement in response to the force applied to a body tissue, recording by means of the characteristic curve of one or more displacements or the tissue ablation termination once reaching the pre-set involvement dimensions. A computer readable carrier implements a computer program executed by a processor for performing actions according to the method.

EFFECT: using the invention enables higher accuracy, speed and ease of the ablation procedure.

20 cl, 8 dwg

FIELD: medicine.

SUBSTANCE: system for ultrasonic tissue therapy comprises an ultrasonic applicator accommodating one or more transducer elements operating in the imaging mode to image the tissue to be treated intermittently, a number of variable-focus lenses attached to one or more transducer elements; focal setting of each of the number of lenses is controlled by a voltage signal on the lens; the system also accommodates a motion controller of the ultrasonic applicator in any of a turning direction and an axial direction, and a therapeutic procedure controller for receiving the image signals as entries and for controlling the voltage signal supplied onto each of the number of variable-focus lenses. The therapeutic procedure controller is used for directing an ultrasonic therapeutic beam. At least three variable-focus lenses of the number of lenses are arranged side-by-side on each of the transducer elements for forming a primary beam on an optical axis of at least three lenses. Each of the three variable-focus lenses is configured to provide separate control of the therapeutic procedure controller for varying the primary beam aperture and to form divergent beams along both sides of the primary beam. A method for measuring the primary beam aperture involves the stages, which provide mounting the ultrasonic applicator with one or more ultrasonic transducer elements not far from the tissue of interest, exciting at least one transducer element by an excitation signal, controlling the effect of the excitation stage by means of the images, controlling the primary beam aperture, displacing or turning the ultrasonic applicator to enable the therapy covering substantially various tissue regions for treating various tissue regions.

EFFECT: using the invention enables the accurate adjustment of the therapeutic beam for conducting therapy of prostates of various sizes and shapes, avoiding the involvement of such critical structures, as the rectal wall and nerve ganglia.

18 cl, 7 dwg

FIELD: machine building.

SUBSTANCE: invention relates to an ultrasound machine for fat reduction and body shaping. The machine comprises an irradiating head, a radiation source carrying block, a mechanical arm, a table for a patient, an elevator casing, a touch screen and control circuits. The touch screen shows the menu for the operator to choose the required function. The irradiating head is fixed in the radiation source carrying block, the said head and the block are attached to the mechanical arm as a solid unit, and the mechanical arm is rigidly fixed to the elevator with the casing of the latter being rigidly fixed on the patient table base. The patient table comprises a base, an upper frame formed by the tubes connected by welding, and a guide unit consisting of two groups of sliding guideways in the form of pins interacting with the slides, and drive mechanisms to provide for the movement of the upper table frame in the longitudinal and transverse directions. Each pair of the guideways/slides comprises a pair of mutually parallel guideways. The guideway pairs are mutually shifted by vertical line and oriented in mutually orthogonal directions, the table base is made as a carrying structure formed by the tubes connected by welding. The control circuits providing for the ultrasound machine control are set between the upper frame and the base of the patient table. Each of the drive mechanisms is based on an electric motor.

EFFECT: invention provides for easy assembly/disassembly of the irradiating head and easy lifting and lowering of the mechanical arm.

5 cl, 13 dwg

FIELD: medicine.

SUBSTANCE: invention refers to medical equipment, namely to devices for ultrasonic transurethral therapy of prostate. A sensor compatible with magnetic resonance equipment comprises an axially pivot ultrasonic element, a adjoining rod providing a support for the ultrasonic element and a possibility of pivoting motion together with it, fluid canals enclosed into the rod for the cooling and acoustic contact fluid circulation, an acoustic membrane fixed to enclose the ultrasonic element and retaining the acoustic contact and cooling fluid, and a rigid outer case attached to the acoustic membrane and configured to comprise the ultrasonic element and the rod, and to provide free rotation of the ultrasonic element and the rod in the case so that the ultrasonic element and the rod turns around the outer case and the acoustic membrane. When operating the sensor, it is positioned in a tubular passage so that the acoustically transparent membrane provides acoustic accessibility to a target along the whole circular length of the tubular passage; the target is exposed to the ultrasonic element through the acoustic membrane along the circle of the tubular passage, and the ultrasonic element is cooled down through the fluid canals integrated into the rod. A magnetic resonance visualisation system comprises a magnet generating a static magnetic field within an examination field, a high-frequency transmission coil configured to excite a magnetic resonance and to manipulate the magnetic resonance within the examination field and/or to obtain magnetic resonance data from the examination field, and a sensor.

EFFECT: using the invention enables relieving side effects and providing therapy without physical injuries of surrounding tissues.

14 cl, 10 dwg

FIELD: medicine.

SUBSTANCE: invention refers to devices for ultrasonic ablation therapy. A machine-readable data medium for the ultrasonic ablation method comprises codes for the stages whereat the first visualisation of a zone of interest is followed by a graphical delimitation of a controlled target object; ultrasonic beam geometries are specified in an ultrasonic ablation gallery as described by the axial and lateral distances to an ultrasonic sensor; the first ultrasonic ablation of the first part of the controlled target object is performed; the second visualisation of the zone follows the first ultrasonic ablation; this provides the basis to calculate ultrasonic ablation geometries limited by the indexed axial and lateral distances in the gallery; for the ablation of the second part of the range of treatment, the other ultrasonic ablation geometries are specified in the gallery on the basis of the second visualisation and calculation, and the second ultrasonic ablation followed at least partially on the basis of the specified other ultrasonic ablation geometries. The ultrasonic ablation system comprises a visualiser, a processor accommodating an instrument for controlling and delimitation of the controlled target object, and an ultrasonic transducer.

EFFECT: using the invention enables reducing a risk of intact tissue involvement and minimising the length of treatment ensured by more accurate determination of the range of treatment.

14 cl, 5 dwg, 2 tbl

FIELD: heating.

SUBSTANCE: invention refers to therapeutic systems for releasing energy into the target point. A therapeutic system comprises a therapeutic module for induction heating of the target zone which is made with the possibility of measuring the temperature in the measurement field of the target zone, and a control module for therapeutic module control which is made with the possibility of creating a prior estimate of the induction heating before the energy releases basing on the measured temperature, the successive energy releases are divided by a cooling period. The control module is additionally made with the possibility of prior estimating the cooling period basing on the estimate of the induction heating before the energy releases and with the possibility of adjusting the cooling period basing on the cooling period estimate. Machine readable medium of the system contains a computer programme which is saved on it and, when implemented, order the therapeutic module to perform successive energy releases and includes instructions to create a prior estimate, adjustment of the therapeutic module and creation of prior estimate of the cooling period before the energy releases.

EFFECT: invention allows for improved accuracy of energy releasing into the target zone.

10 cl, 2 dwg

FIELD: heating.

SUBSTANCE: invention refers to therapeutic devices for releasing energy into the target point. A therapeutic system comprises a therapeutic module made with the possibility of successive releases of energy into the target zone, the successive releases are divided by a cooling period, a thermometer module made with the possibility of measuring the maximal temperature in the measurement field placed beyond the focus of the released energy, and a control module made with the possibility of adjusting the cooling period depending on the measured maximal out-of-focus temperature during the period of energy releasing before the cooling period. Machine readable medium of the system contains a computer programme saved on it and including the instructions which, when implemented, order the therapeutic system to perform successive energy releases, measurements of maximal temperature and adjustment of cooling period basing on the measured maximal out-of-focus temperature during the period of energy releasing before the cooling period.

EFFECT: invention allows for improved accuracy of energy releasing into the target zone for more exact setting of the cooling period.

3 cl, 2 dwg

FIELD: medicine.

SUBSTANCE: invention relates to medical equipment, namely to devices for magnetic resonance. Device contains electric device or component, which includes printed circuit board, and radiofrequency shield, made with possibility of shielding electric device or component, with radiofrequency shield including earth bus of printed circuit board. Device is placed in opening of magnetic-resonance scanner in radiofrequency (B1) field. Earth bus of printed circuit board includes electro-conductive sheet or layer, which has openings, suppressing vibration of earth bus, induced due to changing in time gradient of magnetic field. Magnetic-resonance system contains magnetic-resonance scanner, including basic magnet, winding for creation of magnetic field gradient and one or more radiofrequency coils for production of radiofrequency (B1) field in studied area. Device is placed in opening of magnetic-resonance scanner.

EFFECT: application of invention makes it possible to improve efficiency of MR-compatible electric device work due to reduction of vibration, caused by radiofrequency field.

14 cl, 11 dwg

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