Research On Performance Measurement Methods Of Dual-nuclear Imaging System

The dual-nuclear multi-function imaging system is a nuclear medicine imaging device with both PET and Gamma camera imaging capabilities.Its detector has a double-plate structure,which can effectively improve the utilization efficiency of current single-function devices.The performance indicators of nuclear medicine imaging equipment are a reflection of its imaging capability and imaging quality.The quality of these indicators also determines the value of equipment in research and clinical application to a certain extent.Therefore,system performance testing is an important part of system research.In this dissertation,we study the physical properties,the structure characteristics of the detectors,and the imaging methods of the dual-nucleus multi-functional imaging system.The key factors affecting the performance of the equipment are discussed in depth,especially the PET imaging spatial resolution,PET imaging sensitivity,PET imaging count performance,Gamma imaging spatial resolution and Gamma imaging sensitivity,which are closely related to the characteristics of the equipment itself.Considering that there have not been any performance testing methods for the structure of double-plane,we study the performance test method for the dual-nucleus multi-function imaging system by referring to test method of existing ring detector PET structure and whole-body Gamma camera imaging system.In this dissertation,the test methods research for each key performance index of dual-nuclear multi-functional imaging system are completed.These key performance indicators include PET imaging spatial resolution,PET imaging sensitivity,PET imaging counting performance,Gamma imaging spatial resolution and Gamma imaging sensitivity.For each performance,a detailed study of test methods,test phantoms,test procedures,and test algorithm processing is completed.Monte Carlo simulation is used to verify the correctness of the test method.The performance of the whole system was tested by the test method.The basic performance parameters of the dual-nucleus system were given.