Yamamoto S, Amano M, Miura S, Iida H, Kanno I
J Nucl Med. 1986 Dec;27(12):1925-8.
A deadtime correction method is proposed for quantitative measurements in positron emission tomography. The correction is based on the observation that a deadtime loss of the random coincidence events corresponds to that of the single events and of the total coincidence events. Using the proposed correction method, the deadtime loss was kept within 1% up to the true coincidence rate of 50 X 10(3) cps per plane for a cylindrical phantom of 20 cm in diameter. Accuracy of the method is confirmed to be independent of the size of the object.
提出了一种用于正电子发射断层扫描定量测量的死时间校正方法。该校正基于这样的观察结果：随机符合事件的死时间损失与单事件和总符合事件的死时间损失相对应。使用所提出的校正方法，对于直径为20 cm的圆柱形体模，在每个平面的真符合率高达50×10(3) cps时，死时间损失保持在1%以内。该方法的准确性被证实与物体大小无关。
