使用195mAu和单晶数字伽马相机评估整体射血分数的准确性和可重复性：准直器设计的影响

Accuracy and reproducibility of the assessment of the global ejection fraction using 195mAu and a single-crystal digital gamma camera: influence of collimator design.

作者信息

Zatta G, Tarolo G L, Gallazzi M, De Agostini A, Albertini A, Radice M, Alberti D

机构信息

Nuclear Medicine Department, Istituto di Scienze Mediche Bassini, Italy.

出版信息

Nuklearmedizin. 1987 Aug;26(4):167-71.

PMID:3671098

Abstract

A sequence of RAO first-pass studies (first with 99mTc and then twice with 195mAu) was performed in 18 normal volunteers and in 12 CAD patients using two different types of collimator for medium energy: a standard collimator (MEMS) and a special high-sensitivity collimator (MEHS). The following data were compared: the peak count rate, the net LV end-diastolic counts and the LVEF. Using MEMS the end-diastolic counts acquired were so low (12% of 99mTc average value) that EF standard deviation had a mean value of 0.061 (range 0.045-0.081). With MEHS the following results were obtained: 1. the peak count rate and LV net end-diastolic counts with 195mAu were 55% and 50% respectively, of 99mTc values; 2. a good correlation was shown between LVEF values either with 99mTc and 195mAu (r = .97), or with 195mAu sequential studies (r = .98).

摘要

对18名正常志愿者和12名冠心病患者进行了一系列右前斜位首次通过研究（先用99mTc，然后用195mAu进行两次研究），使用两种不同类型的中能准直器：标准准直器（MEMS）和特殊高灵敏度准直器（MEHS）。比较了以下数据：峰值计数率、左心室舒张末期净计数和左心室射血分数。使用MEMS时，获得的舒张末期计数非常低（为99mTc平均值的12%），以至于射血分数标准差的平均值为0.061（范围为0.045 - 0.081）。使用MEHS时，得到以下结果：1. 195mAu的峰值计数率和左心室舒张末期净计数分别为99mTc值的55%和50%；2. 99mTc和195mAu的左心室射血分数值之间（r = 0.97），或195mAu序贯研究之间（r = 0.98）显示出良好的相关性。