MRI-HIFU treatment equipment with pressure balancing device

Abstract

The utility model relates to MRI-HIFU treatment equipment with a pressure balancing device, which comprises a frame body divided into a dry area and a coupling area by a partition plate, a movable treatment head and the pressure balancing device, the mobile treatment head is controlled by a transmission mechanism to move in the coupling area and release ultrasonic waves to treat a focus; the pressure balancing device is connected with the transmission mechanism, and the volume of the coupling area is changed according to the change of the volume occupied by the transmission mechanism in the coupling area, so that the pressure in the coupling area is kept stable. According to the utility model, the volume of the coupling area is changed through the built-in pressure balancing device according to the change of the volume occupied by the transmission mechanism in the coupling area, so that the pressure in the coupling area is kept stable, and the treatment probe can freely move in the coupling medium; damage of flexible parts or medical negligence caused by pressure unbalance of the coupling area is avoided.

Description

TECHNICAL FIELD

[0001] The utility model belongs to MRI-HIFU treatment equipment technical field, especially is related to a MRI-HIFU treatment equipment with pressure balancing device. BACKGROUND

[0002] Magnetic resonance (MRI) guided focused ultrasound (HIFU) is used for ablation of breast fibroadenoma, and is a technology favored by clinicians, and in recent years, a number of clinical trials have been carried out, showing that the technology has great application prospects. The ultrasound propagation process of MRI-HIFU has poor propagation effect in air, and thus needs medium guidance. Generally, coupling medium such as degassed water needs to be provided for the treatment probe. In actual application, the ultrasound wave is emitted from the treatment head, and needs to pass through the coupling medium or other coupling material to focus on the lesion site of the human body, so as to ensure the smooth progress of the treatment.

[0003] During the treatment process, the coupling medium needs to be limited in a closed space, and in order to ensure that only the coupling medium is between the treatment probe and the human body in the space, the mechanism for controlling the movement of the probe needs to interact with the closed space through a sealing ring. At this time, if the treatment probe changes the focal point position for more accurate pointing to the lesion, a large range of mechanical movement needs to be generated, and then the control mechanism needs to frequently enter / exit the closed space, which can cause the imbalance of the pressure inside the coupling area, and can cause damage to some flexible parts of the equipment, can cause treatment coupling failure to affect the treatment effect, and can even cause skin burns and medical accidents. UTILITY MODEL CONTENTS

[0004] The utility model provides a MRI-HIFU treatment equipment with pressure balancing device, avoids that the coupling medium in the closed space produces the large and fast pressure change due to the mechanical movement of the control mechanism of the treatment probe.

[0005] The utility model adopts the technical scheme that provides a MRI-HIFU treatment equipment with pressure balancing device, including frame, the frame is divided into dry area and coupling area by partition, the coupling area is sealed and is filled with coupling medium and is at least equipped with: mobile treatment head, moves in the coupling area and releases ultrasound wave to the lesion for treatment by transmission mechanism control, pressure balancing device is connected with transmission mechanism, changes the volume of coupling area according to the volume change of transmission mechanism in the coupling area, to keep the pressure stability in the coupling area, the dry area is at least equipped with: drive device, is connected with mobile treatment head through the transmission mechanism of crossing the partition, and at least mobile transmission mechanism can be driven and retracted along the dry area to the coupling area direction.

[0006] Preferably, the transmission mechanism comprises a support frame on which the mobile treatment head is mounted, and a connecting rod connected with the support frame and controlling the mobile treatment head to move in the coupling area or rotate around the X axis.

[0007] Preferably, the partition plate is provided with a sliding groove, and a sealing pad is arranged in the sliding groove, and the connecting rod passes through the sealing pad.

[0008] Preferably, the driving device comprises a telescopic motor and a rotary motor.

[0009] Preferably, the pressure balancing device comprises a cylinder body having one end in communication with the outside of the frame body and an internal cavity, and a sliding plug rod arranged in the cavity of the cylinder body and having one end connected with the mobile treatment head and extending and retracting along with the mobile treatment head in the dry area towards the coupling area.

[0010] Preferably, a supporting frame is arranged on the inner wall of the frame body, and the pressure balancing device is fixed on the supporting frame.

[0011] Preferably, the cylinder body is provided with a locking flange at one end close to the transmission mechanism, and the locking flange is in sealing connection with the sliding plug rod through an O-shaped ring.

[0012] Preferably, the frame body and the cylinder body are provided with a bell joint at one end away from the sliding plug rod, and the bell joints are in communication through an air pipe.

[0013] Preferably, the sliding plug rod is provided with a push plate at one side close to the partition plate, and the transmission mechanism is further provided with a push rod connected with the push plate.

[0014] Preferably, the frame body, the pressure balancing device and the transmission mechanism are all made of magnetic field isolation material.

[0015] Beneficial effects are that the pressure balancing device changes the volume of the coupling area according to the volume change of the transmission mechanism in the coupling area, so as to keep the pressure in the coupling area stable, and the treatment probe can be moved at will in the coupling medium, and the flexible parts are prevented from being damaged or medical accidents are avoided due to the pressure imbalance of the coupling area. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 It is a top view of an MRI-HIFU treatment equipment with a pressure balancing device.

[0017] Figure 2 It is a sectional view of the pressure balancing device. Figure 1 It is a perspective view of the pressure balancing device.

[0018] Wherein, 101-pressure balancing device; 1011-pot joint; 1012-support frame; 1013-cylinder; 1014-locking flange; 1015-sliding plug rod; 1016-push plate; 1017-round nut; 1018-O ring; 1019-air pipe; 102-moving treatment head; 1021-link one; 1022-link two; 1023-link three; 103-frame; 104-coupling area; 105-push rod; 106-dry area; 107-baffle.

[0019] The same reference signs in different figures indicate the same component. DETAILED DESCRIPTION

[0020] The utility model is further explained below in combination with specific embodiments. It should be understood that these embodiments are only used for illustrating the utility model and are not used for limiting the scope of the utility model. In addition, it should be understood that after reading the content taught by the utility model, those skilled in the art can make various changes or modifications to the utility model, and these equivalent forms also fall within the scope defined by the appended claims of the present application.

[0021] As Figure 1 The utility model provides a MRI-HIFU treatment equipment with pressure balancing device, including frame 103 being divided into dry area 106 and coupling area 104 by baffle 107, the coupling area 104 is sealed and is filled with coupling medium inside, still be equipped with moving treatment head 102 and pressure balancing device 101, the moving treatment head 102 is moved in the coupling area 104 through transmission mechanism control and releases ultrasonic wave to carry out treatment to focus of disease, the pressure balancing device 101 is connected with transmission mechanism, changes the volume of coupling area 104 according to the volume change of transmission mechanism in coupling area 104, to keep the pressure stability in coupling area 104. Drive arrangement is equipped in dry area 106, the drive arrangement is connected with moving treatment head 102 through transmission mechanism passing through baffle 107, can drive transmission mechanism and retract along dry area 106 to the direction of coupling area 104. Wherein, the frame 103, the pressure balancing device 101, the transmission mechanism all are magnetic field insulation material.

[0022] The coupling medium adopts degassed water, can also adopt oil or gel and so on medium with good acoustic transmission characteristic and tolerance, as coupling medium when moving treatment head 102 releases ultrasonic wave and carries out coupling treatment, effectively transmits acoustic wave from moving treatment head 102 to focus of disease.

[0023] In a specific embodiment, the transmission mechanism comprises a support frame and connecting rods, on which the mobile treatment head 102 is mounted, the connecting rods being connected with the support frame to control the movement of the mobile treatment head in the coupling area or rotation around the X axis. Specifically, the connecting rods comprise connecting rod one 1021, connecting rod two 1022 and connecting rod three 1023, wherein one end of the connecting rod one 1021 is connected with the driving device and the other end is connected with the support frame, for driving the support frame to extend or retract along the dry area 106 towards the coupling area 104; one end of the connecting rod two 1022 is connected with the driving device and the other end is connected with the support frame, for driving the support frame to move along the length direction of the partition plate 107; one end of the connecting rod three 1023 is connected with the driving device and the other end is connected with the mobile treatment head 102, for driving the mobile treatment head 102 to rotate around the shaft.

[0024] As shown in Figure 2 In a specific embodiment, the pressure balancing device 101 comprises a cylinder body 1013 and a sliding plug rod 1015, one end of the cylinder body 1013 is connected with the frame body 103 and the inside is a cavity; the sliding plug rod 1015 is arranged in the cavity of the cylinder body 1013, one end of which is connected with the mobile treatment head 102 and extends or retracts along with the mobile treatment head 102 along the dry area 106 towards the coupling area 104. A support frame 1012 is arranged on the inner wall of the frame body 103, which is fixed on the inner wall of the frame body 103 by bolts. An O-shaped groove is opened in the support frame 1012, the inner diameter of the O-shaped groove matches the outer diameter of the cylinder body 1013, and the support frame 1012 has two seats arranged at the head end and the tail end of the cylinder body 1013 respectively to prevent the cylinder body 1013 from shaking in the frame body 103.

[0025] The side of the sliding plug rod 1015 close to the partition plate is provided with a push plate 1016, and a push rod 105 is further arranged on the transmission mechanism, which is connected with the support frame, one end of which is fixedly connected with the push plate 1016, and at the same time, the push rod 105 and the support frame are movably connected along the length direction of the partition plate 107, the movable connection is a sliding block and sliding groove connection, or can be a gear and rack connection, etc., to ensure that only the extension or retraction movement along the dry area 106 towards the coupling area 104 is transferred from the support frame to the pressure balancing device 101, and when the connecting rod two 1022 pushes the support frame to move along the length direction of the partition plate 107, it will not affect the sliding plug rod 1015.

[0026] The driving device includes telescopic motor one, telescopic motor two and rotating motor (all are conventional motors, not shown in the figure). The telescopic motor one is connected with the connecting rod one 1021, and pushes the connecting rod one 1021 to stretch and retract along the dry area 106 to the coupling area 104 direction; the telescopic motor two is connected with the connecting rod two 1022, and pushes the connecting rod two 1022 to move along the length direction of the partition plate 107; the rotating motor is connected with the connecting rod three 1023, and drives the connecting rod three 1023 to rotate around the shaft. A speed reducer is arranged between the rotating motor and the connecting rod three 1023, so as to facilitate accurate control of the included angle between the moving treatment head 102 and the plane.

[0027] In order to ensure the sealing between the dry area 106 and the coupling area 104, and prevent the coupling liquid from leaking from the coupling area 104 to the dry area 106 when the transmission mechanism is moving. In a specific embodiment, the partition plate 107 is provided with a sliding groove, and a sealing pad is arranged in the sliding groove. The connecting rod one 1021, the connecting rod two 1022 and the connecting rod three 1023 pass through the sealing pad. When the telescopic motor one and the rotating motor are started, the sealing pad at the connecting rod one 1021 and the connecting rod three 1023 realizes the sealing of the dry area 106 and the coupling area 104; when the telescopic motor two pushes the connecting rod two 1022 to move along the length direction of the partition plate 107, the connecting rod two 1022 drives the connecting rod one 1021 and the connecting rod three 1023 to move in the sliding groove together, and the sealing pad prevents the coupling medium from leaking out of the sliding block and the sliding groove. The sealing of the cylinder body 1013 and the sliding plug rod 1015 is realized by the locking flange 1014 arranged at one end of the cylinder body 1013 close to the transmission mechanism. The locking flange 1014 is locked at one end of the cylinder body 1013 by thread cooperation, and the locking flange 1014 is provided with an O-ring 1018 matched with the sealing of the sliding plug rod 1015, so as to prevent the coupling medium from leaking out of the cylinder body 1013 when the sliding plug rod 1015 moves.

[0028] Most preferably, the cross-sectional area of the sliding plug rod 1015 is equal to the cross-sectional area of the transmission mechanism passing through the partition plate 107, so as to ensure that the volume change generated when the transmission mechanism stretches into and out of the coupling area 104 is equal to the volume change generated when the sliding plug rod 1015 correspondingly enters and exits, thereby ensuring that the pressure in the coupling area 104 is stable, so that the treatment probe can move freely in the coupling medium without damaging the flexible parts or causing skin burns.

[0029] In a specific embodiment, the frame 103 and the cylinder 1013 are provided with a tower joint 1011 at one end away from the slide rod 1015, and the tower joints 1011 are communicated through an air pipe 1019. The tower joint 1011 outside the frame 103 can be connected with an inflation device to reversely drive the slide rod 1015 to move. In other embodiments, the cylinder 1013 can be directly communicated with the outside at one end away from the transmission mechanism.

Claims

1. An MRI-HIFU treatment device with a pressure balancing device, characterized in that, Includes a frame, which is divided into a dry area and a coupling area by a partition. The coupling region is sealed and filled with a coupling medium, and at least includes: A movable treatment head, controlled by a transmission mechanism, moves within the coupling zone and releases ultrasound waves to treat the lesion; a pressure balancing device, connected to the transmission mechanism, changes the volume of the coupling zone according to the change in the volume occupied by the transmission mechanism within the coupling zone, so as to maintain stable pressure within the coupling zone. The dry area shall have at least the following: The drive device is connected to the movable treatment head via a transmission mechanism passing through the partition, and can at least drive the transmission mechanism to extend and retract along the dry area toward the coupling area.

2. The MRI-HIFU treatment device with a pressure balancing device according to claim 1, characterized in that, The transmission mechanism includes: A support frame on which the movable treatment head is mounted; A connecting rod, connected to the support frame, controls the movement of the mobile treatment head within the coupling area or its rotation around the X-axis.

3. The MRI-HIFU treatment device with a pressure balancing device according to claim 2, characterized in that, The partition plate is provided with a sliding groove, and a sealing gasket is provided in the sliding groove. The connecting rod is arranged through the sealing gasket.

4. The MRI-HIFU treatment device with a pressure balancing device according to claim 3, characterized in that, The drive unit includes a telescopic motor and a rotary motor.

5. An MRI-HIFU treatment device with a pressure balancing device according to claim 1, characterized in that, The pressure balancing device includes: The cylinder body is connected to the frame body at one end and has a hollow interior. A sliding rod is located inside the cavity of the cylinder, with one end connected to the movable treatment head, and extends and retracts along the dry area towards the coupling area as the movable treatment head moves.

6. An MRI-HIFU treatment device with a pressure balancing device according to claim 5, characterized in that, The inner wall of the frame is provided with a support frame, and the pressure balancing device is fixed on the support frame.

7. An MRI-HIFU treatment device with a pressure balancing device according to claim 6, characterized in that, The cylinder body is provided with a locking flange at one end near the transmission mechanism, and the locking flange is sealed to the sliding rod by an O-ring.

8. An MRI-HIFU treatment device with a pressure balancing device according to claim 7, characterized in that, The frame and the cylinder are provided with a pagoda connector at the end away from the slide rod, and the pagoda connectors are connected to each other through an air pipe.

9. An MRI-HIFU treatment device with a pressure balancing device according to claim 5, characterized in that, A push plate is provided on the side of the slider rod near the partition, and a push rod is also provided on the transmission mechanism, the push rod being connected to the push plate.

10. An MRI-HIFU treatment device with a pressure balancing device according to any one of claims 1-9, characterized in that, The frame, the pressure balancing device, and the transmission mechanism are all made of materials that isolate magnetic fields.

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