Mask type coil device for magnetic resonance imaging of facial tissues and implants of human body

Abstract

The invention discloses a mask type coil device for magnetic resonance imaging of human face tissues and implants, which comprises a soft shell arranged outside a coil body, and the soft shell comprises an upper panel and a lower panel which are the same in material, structure and shape; the upper panel is formed by flexibly bonding six polyimide curved panels through polyurethane rubber, and the six curved panels cover the forehead part, the nose part, the cheek part, the cheek part, the periphery of the lip part and the lower jaw part respectively; nose and eye through holes are formed in the curved plate; the edges of the upper panel and the lower panel are correspondingly connected; the coil body comprises 24 annular coils, and all the coils comprise overlapped parts; the peripheral contour of all the arranged coils is basically consistent with the contour of the soft shell, and the coil body is connected to a magnetic resonance host interface through an external interface board and a radio frequency wire harness. According to the invention, the coil body fits the face of a wearer, and the obtained magnetic resonance imaging has better signal-to-noise ratio and higher image quality.

Description

technical field [0001] The invention relates to the technical field of magnetic resonance imaging, in particular to a mask-type coil device for magnetic resonance imaging of facial tissue and implants of a human body. Background technique [0002] The basic principle of magnetic resonance imaging (MRI, Magnetic Resonance Imaging) comes from the discovery of American scholars Bloch and Purcell in 1946 that under the action of an external magnetic field, some protons (including the Hydrogen protons) under the action of short-term radio frequency waves, the precession angle increases. When the radio frequency waves stop, those protons will gradually return to their original state, and at the same time release radio frequency signals with the same frequency as the excitation wave. This physical phenomenon Known as NMR. Magnetic resonance imaging technology uses this principle to selectively excite the atomic nuclei in the human body at the desired position by adding a pulsed gr...

AI Technical Summary

Problems solved by technology

[0005] At present, most plastic surgeons use verbal descriptions and preoperative photos to communicate with beauty seekers before performing facial plastic surgery, so as to understand the beauty seekers’ surgical expectations and determine the subsequent surgical plan. This type of facial plastic surgery The preoperative consultation design and intraoperative operation are all qualitative design rather than quantitative design, because there is no clear postoperative simulation effect map for the reference of beauty seekers and surgeons, so the pros and cons of the operation effect and success or failure depend on The clinical experience of the surgeon; at the same time, due to the differences in the anatomical shape of the facial and nasal tissues among individual beauty seekers, intraoperative tissue injury, bleeding and swelling, poor facial filling effect, and poor sculpting of the nasal prosthesis, it is difficult for patients immediately after plastic surgery. Judgment of the effect and preferences, etc., resulting in the postoperative effect may not meet the expectations of the beauty seeker, and even problems such as requiring a second operation and medical disputes

[0006] Since the magnetic resonance receiving coil has higher requirements on the signal-to-noise ratio and resolution of magnetic resonance imaging, and the existing commercial magnetic resonance receiving coil is difficult to fit the face, its filling factor is low, resulting in a lower signal-to-noise ratio. Low, it is often difficult to clearly show the details of the facial structure

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