体位改变对SPECT心肌显像中左室下壁衰减校正的价值  

A study of a method to decrease artifactual defects of inferior wall in ^(99)Tc^m-MIBI myocardial SPECT

作　　者：石洪成[1] 陈绍亮[1] 李文罡[1] 姚之丰[1] 朱玮珉[1] 刘文官[1] 

机构地区：[1]复旦大学核医学研究所

出　　处：《中华核医学杂志》2001年第2期82-84,共3页Chinese Journal of Nuclear Medicine

摘　　要：目的　探讨右侧卧位 (RL)和俯卧位采集对99Tcm 甲氧基异丁基异腈 (MIBI)心肌显像左室下壁衰减校正的价值。方法　对 31例正常者进行了仰卧位、RL和俯卧位99Tcm MIBI静息心肌显像。在靶心图上测定各区域像素平均计数 ,在断面图上对下壁显示断层形态和扫描过程中位移情况进行分级 ,在不同体位间进行比较。结果　①仰卧位有 5 8.1%的下壁显示不全 ,体位变化后 88.9%有不同程度的改善。②俯卧位和RL对于下壁的形态显示和计数均优于仰卧位。③各种体位间位移差异并无显著性。结论　俯卧位和RL可使下壁衰减得以校正 ,计数和断层明显改善 ,且前者更好。Objective To evaluate whether the prone and the right lateral(RL) imaging can image the left ventricular inferior wall better than supine imaging. Methods The RL and prone position images were obtained one after another immediately after supine imaging. Regional myocardial counts were assessed by quantitative polar map analysis for 31 subjects without ischemic myocardium, and the slices were scored by three experienced observers. The frequency and the degree of severity of motion during data acquisition were evaluated by the computer soft ware. All the results were compared among the three positions. Results In supine imaging 58.1% of the inferior wall had showed artificial defects, but in RL or prone imaging 88.9% became normal. Higher inferior myocardial counts per pixel and better images were observed in prone and RL than in supine imaging,and the previous form (prone imaging) was better than the latter. All study subjects tolerated RL and prone imaging well.Conclusion RL position and prone position improve the inferior wall counts per pixel and make it show more completely than in supine imaging.

关 键 词：体位改变 SPECT 心肌显像 左室下壁 衰减校正 

分 类 号：R817[医药卫生—影像医学与核医学]