Collimator, scanning device and using method of scanning device

Abstract

The invention discloses a collimator, a scanning device and a using method of the scanning device. The collimator comprises an annular cylinder, a plurality of grille pieces and a locating component, wherein the grille pieces stretch along the radial direction and are arranged along the axial direction, the axial direction part of the annular cylinder is equally divided into a plurality of grilles by the grille pieces, and the width of the grilles is adjustable; the locating component is used for locating the grille pieces on the annular cylinder. The collimator provided by the invention not only has a 2D (Two-Dimensional) and 3D (Three-Dimensional) data collection function in the prior art, but also can be used for adjusting or changing the positions of the grille pieces arranged at the inner part of the collimator, changing the width of the grilles and increasing the using field of the collimator; in addition, collimation scanning can be carried out on rays by changing the width of the grilles of the collimator on the premise that the collimator is not replaced according to difference of scanning positions, and the functions of optimized operation of controlling the injected medicine dosage, the scanning time, the ray counting rate and the like can be obtained. Through the mode, the working efficiency of the scanning device can be further increased without replacing the collimator, and the using cost of the scanning device is reduced.

Description

technical field [0001] The invention relates to the technical field of medical instruments, in particular to a collimator, a scanning device and a use method thereof. Background technique [0002] In recent years, equipment in the field of nuclear medicine has developed rapidly, among which positron emission tomography (hereinafter referred to as PET) technology is known as the crown of high-tech medical technology. Its principle is to label drugs with positron emission ( Imaging agent) injected into the human body, such as one or two isotopes of carbon, fluorine, oxygen and nitrogen, these drugs have an annihilation effect in the process of participating in the physiological metabolism of the human body, and generate two The γ-ray photons whose energy moves opposite to each other, according to the difference in the ability of different parts of the human body to absorb the labeled compound, the concentration of the isotope in each part of the human body is different, and th...

AI Technical Summary

Problems solved by technology

[0007] From the above description, it can be seen that the number of 2D acquisition ray coincidences is relatively small, and the imaging speed is relatively fast, but in order to obtain relatively high-quality images, the amount of medicine that needs to be injected is relatively large; It can reduce the amount of drug injected, but due to the large amount of collected data, the time required for image reconstruction is prolonged, and the scattering rays must be effectively corrected to obtain better quality images

And the attenuation correction and system calibration also become complicated, and it usually takes several minutes to collect a bed

[0008] In addition, when scanning different parts, the amount of injected medicine is also different, so in order to obtain a relatively high image, the collimator must be replaced, which is troublesome to operate and the measurement efficiency is relatively low

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