Takayama T, Motomura N
Medical Engineering Laboratory, Toshiba Corporation.
Kaku Igaku. 1998 Oct;35(8):721-6.
We evaluated the accuracy of left ventricular volume calculations performed using the left ventricular function automatic analysis software (QGS program), which automatically extracts the left ventricular profile from ECG-gated myocardial SPECT data and then measures the left ventricular volume. We used a myocardial phantom for this evaluation. The results of our experiments showed that the left ventricular volume was underestimated by up to 13% as the SPECT spatial resolution deteriorated. To overcome this problem, we have developed a method for correcting the left ventricular volume measured by the QGS program according to the SPECT spatial resolution of the detectors. This new correction method permits the left ventricular volume of the phantom to be calculated with an error of less than 1.4%.
我们评估了使用左心室功能自动分析软件（QGS程序）进行左心室容积计算的准确性，该软件可从心电图门控心肌单光子发射计算机断层扫描（SPECT）数据中自动提取左心室轮廓，然后测量左心室容积。我们使用心肌模型进行了此项评估。我们的实验结果表明，随着SPECT空间分辨率的降低，左心室容积被低估了高达13%。为克服这一问题，我们开发了一种根据探测器的SPECT空间分辨率校正QGS程序测量的左心室容积的方法。这种新的校正方法能够以小于1.4%的误差计算模型的左心室容积。
