Three-dimensional heterogeneous PET (positron emission tomography) system

Abstract

The invention provides a three-dimensional heterogeneous PET (positron emission tomography) system. The system comprises at least two heterogeneous detector modules, wherein each heterogeneous detector module comprises at least two crystal strips; the crystal strips are closely arranged to form the heterogeneous detector modules; detection properties of different kinds of the crystal strips are positioned at different grades; the detection properties of the crystal strips of the same kind are positioned at the same grade; detection property parameters of the crystal strips include energy resolution, density, size, light output and the like; the detection properties of the crystal strips positioned at different grades comprise one or more of the detection property parameters of the crystal strips positioned at different grades. Compared with a high-space-resolution PET system, the system disclosed by the invention has the advantage that the overall manufacturing cost of the PET system can be effectively reduced on premise of not obviously reducing the space resolution of the PET system. Compared with an ordinary-space-resolution PET system, the system disclosed by the invention has the advantage that the space resolution of the PET system can be improved when the cost is not obviously increased. In addition, an imaging view field under the high space resolution can be provided in partial radial direction.

Description

technical field [0001] The invention relates to a positron emission computed tomography system in the field of nuclear medicine, and more particularly to a three-dimensional heterogeneous PET system. Background technique [0002] PET (Positron Emission Tomography, positron emission tomography, hereinafter referred to as PET) is a large-scale, cutting-edge nuclear medical imaging equipment. Its imaging principle is to inject biologically active and radioactive tracers into the living body. The tracer participates in the metabolism of the living body, and the tracer presents different distributions in the living body with different metabolic levels, and then the distribution of the tracer in the living body is imaged. PET can non-invasively, quantitatively and dynamically evaluate the metabolic level, biochemical reaction and functional activity of various organs in the living body at the cellular level, so it can detect relevant biochemical changes before many diseases cause ...

AI Technical Summary

Problems solved by technology

[0010] The purpose of the present invention is to provide a three-dimensional heterogeneous PET system, so as to solve the problem that the PET system in the prior art cannot take into account both cost and high spatial resolution imaging at special positions

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