摘要
探测距离对γ照相机系统空间分辨率的影响非常显著。FWHM和FWTM与探测距离呈线性关系而增大;随着距离的增加高分辨准直器的FWTM和FWTM明显小于通用型准直器。临床检查中尽量缩短探测距离,除了使用高分辨率的准直器外,还应了解所使用γ照相机在不同探测距离下所具有的空间分辨能力,以便对图象结果作出客观分析。
The influence of detect distance on space resolution of Υ camera system is great- significance.The detect distance of FWHM and FWTM assumes linearity.With the increasing in distance,FWHM and FWTM of resoution collimator is smaller than the universal collimator.So there should be reduced detect distance during the clinical examination,with the exception of using resolution collimator,and should comprehend the space resolution abilities of Υ camera used in different detect dis- tances to make out objective analysis of image results.
出处
《医疗卫生装备》
CAS
1990年第3期6-8,共3页
Chinese Medical Equipment Journal
