An Electron Paramagnetic Resonance Cavity for In Vivo Measurements of Human Teeth

A technology for magnetic resonance cavity and body measurement, which is applied in the directions of diagnostic recording/measurement, dentistry, application, etc., to achieve the effects of easy processing and production, reduced influence and simple structure

Active Publication Date: 2017-12-22
INST OF RADIATION MEDICINE ACAD OF MILITARY MEDICAL SCI OF THE PLA
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Problems solved by technology

Due to the experimental conditions and sampling problems, this method has great limitations in practical application.

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  • An Electron Paramagnetic Resonance Cavity for In Vivo Measurements of Human Teeth

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Embodiment Construction

[0012] The inner diameter of the resonant cavity is 22mm, the inner height of the resonant cavity is 28.2mm, the thickness of the cavity is 1.5mm, the structural material of the cavity is copper, and the surface is plated with silver. The long side of the rectangular longitudinal through opening of the sample detection port is 10 mm long and the short side is 3 mm, and the sample detection port is chord-wise connected to the chamber wall. The modulation coil is fixed at 5cm on both sides of the center of the sample detection port, and a 100K Hz modulation current is applied. The cavity is connected with the microwave system of the Bruker-A300 electron paramagnetic resonance spectrometer through the deployment unit and the waveguide. The microwave resonance frequency is 9.55G Hz, and the microwave field type in the cavity is TE111. The actual application effect is as follows: the resonant cavity of the present invention is used to detect diphenylpicrylhydrazine free radical (DP...

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Abstract

The present invention relates to an electron paramagnetic resonance resonant cavity capable of measuring human teeth in vivo. The shape of the resonant cavity is cylindrical, and a rectangular sample detection port is opened on the side of the cavity. The sample detection port runs through the chord direction of the cylindrical cavity, and its long side is perpendicular to the direction of the microwave magnetic field component in the resonant cavity and to the cavity wall The directions of the upper current lines are parallel; a pair of coils for modulating the magnetic field are placed on both sides of the sample detection port; the tuning bolts outside the coupling hole are used to realize the coupling adjustment between the resonant cavity and the microwave system; the overall structure of the resonant cavity and the adjustment unit has good electrical conductivity Made of metal. The invention is mainly used for in vivo electron paramagnetic resonance measurement of human teeth to realize rapid estimation of radiation dose, and can also implement electron paramagnetic resonance outside the cavity for samples that are not suitable for destroying the overall structure or are too large to be conveniently placed into the resonant cavity. Resonance detection.

Description

technical field [0001] The invention relates to an electron paramagnetic resonance detection device, in particular to an electron paramagnetic resonance resonant cavity capable of measuring human teeth in vivo. The volume and shape of this specially designed resonant cavity are suitable for being placed in the human oral cavity for direct detection of teeth, so as to obtain the electron paramagnetic resonance spectrum of enamel samples. The technical field is new technologies and methods of biophysics. Background technique [0002] Electron paramagnetic resonance (EPR for short) is a technique used to detect the Zeeman energy level transition of the spin magnetic moment of uncoupled electrons in matter. This technique can be used to analyze the content and properties of paramagnetic centers such as free radicals, transition metal elements, and lattice defects contained in substances. Therefore, electron paramagnetic resonance technology is widely used in many fields such as...

Claims

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Application Information

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Patent Type & Authority Patents(China)
IPC IPC(8): A61C19/04A61B5/055
Inventor 吴可郭俊旺丛建波袁清泉董国福先宏
Owner INST OF RADIATION MEDICINE ACAD OF MILITARY MEDICAL SCI OF THE PLA
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