Magnetic resonance scan magnetism field uniformity compensation auxiliary device

Abstract

The invention provides a magnetic resonance scan magnetism field uniformity compensation auxiliary device, and relates to medical imaging examinations. When the magnetic resonance scan magnetism field uniformity compensation auxiliary device is used for scanning irregular body parts of necks and shoulders, upper limbs, wrist joints, palms, knee joints, ankle joints, wrist joints, feet and the like in magnetic resonance mode, partial space can be filled, geometrical morphology of the irregular body parts is changed, the number of interfaces between air and soft tissue is decreased, uniformity of a part of a magnetic field is improved, the body position can be fixed, occurrence probability of random motions is decreased during the scanning process, and therefore magnetic sensitive artifacts and motion artifacts are eliminated or alleviated, and simultaneously partial fat suppression effects can be obviously improved and reliable magnetic resonance images can be provided to clinical diagnosis. The magnetic resonance scan magnetism field uniformity compensation auxiliary device has the advantages of being capable of effectively solving the problems of serious artifacts and low fat suppression effects of the magnetic resonance scan images of the irregular body parts on the basis of not changing an existing scan device, an existing scan method, an existing scan sequence and existing scan parameters and not prolonging scanning time, obviously improving image quality, and increasing detection rate of diseases.

Description

Technical field [0001] The invention involves medical imaging examinations and belongs to a magnetic resonance scanning magnetic field uniformity compensation auxiliary device. Background technique [0002] Magnetic resonance is a new medical imaging technology developed by the end of the 1970s after the CT in the late 1970s, with the help of electronic computer technology and image reconstruction mathematics.If you have good soft tissue resolution, bone pseudo -shadow interference, multi -parameter imaging, multi -directional imaging, blood vessel imaging without consolidation agent is required.It has obvious advantages in the central nervous system, head and neck, muscle joint system, peripheral nerve imaging, and abdominal pelvic mass organs and breast examination.However, because the human neck, shoulder, upper limbs, wrist joints, palms, knee joints, ankle joints, wrist joints, feet, etc., geometric forms are irregular, and the body changes are relatively suddenly., Air-soft...

AI Technical Summary

Problems solved by technology

[0003] The purpose of the present invention is to solve the problem of large magnetic resonance imaging artifacts in irregular human body parts, incomplete fat suppression, and often accompanied by motion artifacts that cause image The problem of poor quality is an external magnetic resonance scanning magnetic field uniformity compensation auxiliary device, which mainly reduces the change in geometry and fills the gap between it and the coil and tissue through a good fit between the device and the examined part , thereby improving the uniformity of the local magnetic field, reducing the susceptibility difference of the air-soft tissue interface, eliminating or alleviating susceptibility artifacts, significantly improving the effect of fat suppression, and at the same time being able to play a braking role and reduce image motion artifacts; the present invention The magnetic resonance scanning magnetic field uniformity compensation auxiliary device provided is characterized in that it includes the following steps: 1) The auxiliary device is composed of two parts: an internal filling material and an external fixing device, and the internal filling material is composed of calcium carbonate powder, liquid paraffin, and glycerin. It is made by mixing in a specific ratio, with good plasticity and uniformity. The external fixation device is composed of two layers, the inner layer is a plastic film, covering the surface of the inner filling material, and the outer layer is made of medical cotton cloth. The size and shape are the same as those of the inner layer. The fillings are consistent, and can be divided into the following forms according to the different parts of use: cylindrical bags, boot-shaped belts, rectangular bags, sleeve bags, etc., except for sleeve bags, the rest are open structures, with There are adhesive sheets or ties, and different forms of auxiliary devices can be selected according to different scanning parts; 2) The device is first applied before the MRI scan of the above-mentioned irregular parts, neck, upper limbs, wrist joints, ankle joints, knee joints , The feet are applied in a 360° wrapping manner, glued and fixed with adhesive sheets, the shoulders are applied in the front and back directions, and the laces at both ends are fixed on the opposite armpit respectively, and the neck and shoulder junctions are overlapped

Images