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CN-121774483-B - Nuclear magnetic resonance imaging positioning device suitable for head

CN121774483BCN 121774483 BCN121774483 BCN 121774483BCN-121774483-B

Abstract

The invention relates to the technical field of nuclear magnetic resonance imaging, and particularly provides a nuclear magnetic resonance imaging positioning device applicable to a head. According to the invention, a traditional integral type air bag structure is abandoned, the design that a plurality of pneumatic clamping assemblies distributed on two sides of the interior of the headgear are matched with head fixing air bags is adopted, the self-adaptive movement of an air bag mounting plate is realized through pneumatic driving, the bulge and the concave area of the heads of different patients can be attached in a targeted manner by combining the inflation expansion of the air bags, the defect that the traditional integral type air bags cannot be adapted to multiple head types is overcome, the attaching degree and the stability of head fixing are greatly improved, and the influence on nuclear magnetic resonance imaging quality due to slight shaking of the heads is avoided.

Inventors

  • SUN MINGXIANG
  • XIONG JIANCHAO
  • ZHANG YAJUN
  • XU ZHIQIANG
  • GAO XIN

Assignees

  • 上海全景医学影像诊断中心有限公司

Dates

Publication Date
20260505
Application Date
20260309

Claims (6)

  1. 1. The nuclear magnetic resonance imaging positioning device suitable for the head is characterized by comprising a lying plate (1) and a head sleeve (2) fixedly connected to one side of the lying plate (1), wherein pneumatic clamping assemblies (3) are arranged on two sides of the interior of the head sleeve (2), each pneumatic clamping assembly (3) comprises a fixed block (31), a piston cylinder (32), a gas distribution cylinder (33) and an air bag mounting plate (34), the fixed blocks (31) are fixedly arranged in the head sleeve (2), the piston cylinders (32) are fixedly arranged on the fixed blocks (31), piston rods (322) fixedly connected with the piston blocks (321) slide out of one ends of the piston cylinders (32) and then fixedly connected with a moving plate (35), the gas distribution cylinders (33) fixedly penetrate through the moving plate (35), one ends of the gas distribution cylinders (33) are fixedly connected with a three-way pipe (37) in a sliding sealing mode, one ends of the gas distribution cylinders (36) are fixedly arranged on one sides of the air bag mounting plates (34), and the head fixing air bags (341) are fixedly arranged on one ends of the air bag mounting plates (34) and are communicated with one ends of the three-way pipes (37) through pipes (342); The other end of the piston cylinder (32) is connected with a first air inlet pipe (323) with a one-way valve, the other end of the air distribution cylinder (33) is connected with a second air inlet pipe (39), the first air inlet pipe (323) is communicated with the second air inlet pipe (39) through a first hose (38), a third air inlet pipe (4) is connected between one end, close to the first air inlet pipe (323), of the piston cylinder (32), the three-way pipe (37) is communicated with the third air inlet pipe (4) through a second hose (371), and the first air inlet pipe (323) is communicated with the manual air charging bag (5); The inside of the gas cylinder (33) is fixedly provided with a blocking block (331), the middle part of the blocking block (331) is provided with a central hole (3311) for a vent rod (36) to pass through in a sliding sealing way, the vent rod (36) is provided with a through hole (361) along the diameter direction, the vent rod (36) is provided with a shaft hole (362) along the axis direction, one end of the shaft hole (362) is communicated with the through hole (361), the other end of the shaft hole (362) is communicated with a three-way pipe (37), the through hole (361) is positioned at one side of the blocking block (331), the blocking block (331) is provided with vent holes (3312) along the length direction, and the vent holes (3312) are positioned around the central hole (3311); The sealing block is characterized in that a sealing cover (332) is fixedly connected to one side wall of the sealing block (331), the sealing cover (332) is coaxial with the central hole (3311), elastic pieces (333) are fixedly distributed on the inner wall of the circumference of the sealing cover (332), one end of each elastic piece (333) obliquely stretches into one end of the central hole (3311), and the ventilation rod (36) is abutted against the elastic pieces (333) when moving to one side of the sealing cover (332).
  2. 2. The head-applicable MRI positioning device as set forth in claim 1, wherein a stop lever (334) is fixedly disposed on an inner wall of one side of the plugging cover (332), the elastic sheet (333) is disposed around the stop lever (334), and the ventilation rod (36) abuts against the stop lever (334) when moving into the plugging cover (332).
  3. 3. The head-applicable MRI positioning device as set forth in claim 2, wherein the upper and lower ends of the movable plate (35) are fixedly provided with connecting blocks (351), sliding rods (352) are slidably inserted through the connecting blocks (351), one ends of the sliding rods (352) are fixedly connected with the air bag mounting plate (34), and the other ends of the sliding rods (352) are fixedly connected with limiting blocks (353).
  4. 4. A nuclear magnetic resonance imaging positioning device suitable for a head is characterized in that air supply pipes (6) are arranged in the inner walls of two sides of a head cover (2) in a penetrating mode along the length direction of the inner walls, an air distribution pipe (61) is connected to the air supply pipes (6), the air distribution pipe (61) penetrates through the inner walls of the head cover (2) and then is connected with an air inlet pipe I (323) through a hose, a main air pipe (7) is arranged on the front side wall of the head cover (2), the front end of the air supply pipe (6) is connected with the main air pipe (7), and the main air pipe (7) is connected with a manual inflatable air bag (5) through the hose.
  5. 5. The nuclear magnetic resonance imaging positioning device suitable for the head, as set forth in claim 4, characterized in that the side wall of the fixing block (31) close to the middle part of the head cover (2) is provided with a mounting groove (311), the inner wall of the mounting groove (311) is provided with an arc groove (312) matched with the piston cylinder (32), the piston cylinder (32) is fixedly arranged in the arc groove (312), the side wall of the other side of the fixing block (31) is fixedly connected with a female magic tape (313), the inner walls of the two sides of the head cover (2) are fixedly connected with a sub magic tape, the side wall of the fixing block (31) connected with the inner wall of the head cover (2) is provided with an air pipe accommodating groove (314), the air pipe accommodating groove (314) is communicated with the mounting groove (311), and the air inlet pipe I (323) and the air distributing pipe (61) are positioned in the air pipe accommodating groove (314).
  6. 6. The head-applicable nuclear magnetic resonance imaging positioning device according to claim 5, wherein the bottom of the head cover (2) is higher than the bottom of the lying plate (1), a duct groove (8) is formed in one side wall of the lying plate (1) close to the head cover (2), and an air pipe connected with the air supply pipe (6) and the manual air inflation bag (5) is paved in the duct groove (8).

Description

Nuclear magnetic resonance imaging positioning device suitable for head Technical Field The invention relates to the technical field of nuclear magnetic resonance imaging, in particular to a nuclear magnetic resonance imaging positioning device applicable to a head. Background The nuclear magnetic resonance imaging technology uses a radio frequency magnetic field to excite hydrogen protons in a human body to generate resonance, further receives radio frequency signals released in the proton relaxation process, and reconstructs a human body structure image after being processed by a computer. The performance of the radio frequency coil as the core hardware for realizing the technology directly determines the nuclear magnetic resonance imaging quality, the scanning efficiency and the clinical application range. Because the distance between the body radio frequency coil and the patient body is far, a high signal-to-noise ratio is difficult to obtain, and the requirement of accurate imaging cannot be met, local coils for different parts of the human body, such as a head coil (head and neck coil), a spine coil, an abdomen coil, a lower limb coil and the like, are generated. The local coil is mostly a radio frequency receiving coil, can be directly coated on the corresponding part of a human body during scanning, is closer to a scanning area, can obviously improve the signal-to-noise ratio of signals, and provides guarantee for high-quality imaging. In head nuclear magnetic resonance examinations, the prior art procedure generally requires the patient to place the head pillow in the recess of the head coil, and then fill the gap between the head and the recess by means of balloon inflation, thereby achieving a fixed positioning of the head. However, most of the currently used air bags are of an integral structure, and have obvious adaptability defects that the integral air bags are in a uniform expansion form after being inflated, cannot be adaptively adjusted according to head type differences of different patients, and are difficult to be attached to protruding and recessed areas of the heads of the patients in a targeted mode, so that head fixing accuracy is insufficient. The imperfect fixation method is easy to cause imaging blurring due to slight shaking of the head of a patient, and seriously affects the accuracy of a diagnosis result. For this purpose we propose a head applicable mri positioning device. Disclosure of Invention In order to overcome the defects in the prior art, the invention provides a magnetic resonance imaging positioning device applicable to a head. The invention adopts the technical scheme that the nuclear magnetic resonance imaging positioning device suitable for the head comprises a lying plate and a head sleeve, wherein the head sleeve is fixedly connected to one side of the lying plate, pneumatic clamping assemblies are distributed on two sides of the interior of the head sleeve, each pneumatic clamping assembly comprises a fixed block, a piston cylinder and a gas distribution cylinder and a gas mounting plate, the fixed blocks are fixedly arranged in the head sleeve, the piston cylinders are fixedly arranged on the fixed blocks, the piston blocks are arranged in the piston cylinders, piston rods are fixedly connected to the piston blocks, a moving plate is fixedly connected to the moving plate after the piston rods extend out of one end of the piston cylinders in a sliding mode, one end of each gas distribution cylinder is fixedly arranged on the moving plate, a ventilation rod penetrates through the one end of each ventilation rod, one side surface of each gas distribution cylinder is fixedly provided with a head fixing gas bag, each head fixing gas bag is communicated with one end of each three-way pipe through a gas charging pipe, the other end of each piston cylinder is connected with a first gas charging pipe, each gas distribution cylinder is connected with a second gas charging pipe in series, each gas distribution cylinder is fixedly connected with a second gas charging pipe, each gas distribution cylinder is communicated with the first hose, a second gas charging pipe is connected to the gas charging pipe is communicated with the first gas charging pipe, one end of each gas distribution cylinder is close to the gas charging pipe is connected with the first gas charging pipe, and then is communicated with the gas charging pipe through the gas charging pipe and the gas distribution pipe is connected with the first gas charging pipe, and the gas charging pipe is connected with the gas charging pipe through the gas charging pipe. Further, the inside fixed shutoff piece that is equipped with of gas cylinder, the centre bore that supplies the pole sliding seal to pass of ventilating is seted up at the shutoff piece middle part, the through-hole has been seted up along its diameter direction on the pole of ventilating, the shaft hole has been seted up along its axis direction on