Prostate puncturing mechanism applied to inner part of magnetic resonance imaging machine and working method

A magnetic resonance imaging and prostate technology, which is applied in the field of medical devices, can solve the problem that acupuncture mechanism cannot realize the mutual replacement of rigid needles and flexible needles, etc., and achieves the effects of good nuclear magnetic compatibility, miniaturization, and motion control.
CN110236647APending Publication Date: 2019-09-17NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
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Patent Information

Authority / Receiving Office
CN Β· China
Current Assignee / Owner
NANJING UNIV OF AERONAUTICS & ASTRONAUTICS
Publication Date
2019-09-17

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Abstract

The invention discloses a prostate puncturing mechanism applied to an inner part of a magnetic resonance imaging machine and a working method. The mechanism comprises an outer needle rotation unit, an inner needle feeding unit and an anti-friction unit, wherein when a prostate puncturing needle is a rigid needle, friction resistance in a puncturing process can be reduced through high-frequency vibration of the anti-friction unit; and when the prostate puncturing needle is a flexible needle, rotation of the flexible needle can be controlled through the outer needle rotation unit, so that guidance and obstacle avoidance are realized. According to the prostate puncturing mechanism disclosed by the invention, by adopting a nonmagnetic or weak-magnetic material such as resin and aluminum alloys, and the prostate puncturing mechanism is not affected by a magnetic field, has a less influence on image quality and has good nuclear magnetic compatibility; and meanwhile, by adopting direct driving of nonmagnetic ultrasonic motors of a variety of forms, motion conversion mechanism is eliminated, and therefore, the prostate puncturing mechanism has the characteristics of being compact in structure, high in displacement controlling property and high in response speed.
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Description

technical field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a prostate acupuncture mechanism and a working method used in a magnetic resonance imager. Background technique

[0002] Prostate disease is a common disease that endangers men's health. At present, radiotherapy and biopsy for prostate diseases mostly use manual acupuncture. Compared with manual acupuncture, the prostate acupuncture robot based on magnetic resonance imaging navigation has better visibility and better positioning capabilities. However, the prostate acupuncture robot based on magnetic resonance imaging navigation is affected by the limited space and strong magnetic field environment inside the magnetic resonance imager, and its structure design, material and actuator selection are different from ordinary medical robots.

[0003] The puncture needles used in prostate acupuncture surgery are divided into rigid needles and flexible needles. Both ...

Claims

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