Method for detecting skin burn depth based on unilateral nuclear magnetic resonance sensing equipment

Abstract

The invention relates to a method for detecting the skin burn depth based on unilateral nuclear magnetic resonance sensing equipment, and belongs to the field of nuclear magnetic resonance detection. The structure of the unilateral nuclear magnetic resonance sensing equipment mainly comprises a permanent magnet structure, a radio-frequency coil, a gradient coil and a radio-frequency shielding device. The gradient coil conducts spatial encoding; a natural gradient perpendicular to the surfaces of magnets is taken as a selective layer gradient according to the characteristics of a magnetostatic field formed by the unilateral magnets, bi-phase encoding is conducted instead of frequency encoding, and according to the difference of the skin longitudinal relaxation time T1, the skin transverse relaxation time T2 and the diffusion coefficient D measured through obtained magnetic resonance signals, the skin burn depth can be detected. According to the method, the characteristic that the magnetostatic field formed by the unilateral magnets has a longitudinal gradient is fully utilized, and thus the loss of radio frequency energy is reduced; the defect that the signal-to-noise ratio is low is overcome with an accumulation method, signals are constantly restored with a series of 180-degree refocused pulses, and the signal-to-noise ratio can be increased after the signals are superposed and averaged.

Description

technical field [0001] The invention belongs to the field of nuclear magnetic resonance detection, and relates to a method for detecting skin burn depth based on a single-sided nuclear magnetic resonance sensing device. Background technique [0002] In recent years, portable single-sided nuclear magnetic resonance technology has been widely used in food analysis and quality control, material science, geophysics and other fields. Its structure is open, its volume is small, and it is easy to move. It can perform non-destructive testing on objects at any position and from any angle. At the same time, it uses permanent magnets to provide the main magnetic field, which is low in price and low in energy consumption. The information given includes relaxation time T1, T2 imaging, diffusion coefficient D, and even chemical shift. Skin burns are a common disease, but currently there are no good testing equipment and methods for judging the degree of skin burns and diagnosing skin rec...

AI Technical Summary

Problems solved by technology

Skin burns are a common disease, but currently there are no good testing equipment and methods for judging the degree of skin burns and diagnosing skin recovery after burns, mainly based on the subjective judgment of doctors and the personal experience of patients. This method is relatively rough , Subjective, easy to cause misjudgment of burn depth and wrong treatment plan

Existing medical diagnostic methods, such as computed tomography (CT) and magnetic resonance imaging (MRI), can image human skin, but they are too bulky to perform clinical real-time monitoring and measurement.

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