Good W F, Gur D
Department of Diagnostic Radiology, University of Pittsburgh, PA 15261.
AJNR Am J Neuroradiol. 1991 Jan-Feb;12(1):83-5.
The errors associated with derivation of cerebral blood flow values by the xenon-enhanced CT method have been evaluated through computer simulations as a function of flow-activation patterns and different scanning protocols. The results of this study indicate that actual flow activation during inhalation increases the derived flow values in a systematic way. Compared with the errors introduced by CT noise and/or variations in scanning protocols, flow activation introduces relatively small errors in the derived flow value when the washin technique is used.
通过计算机模拟，根据血流激活模式和不同扫描方案，评估了氙增强CT法推导脑血流量值时的误差。本研究结果表明，吸入过程中的实际血流激活会以系统的方式增加推导的血流值。与CT噪声和/或扫描方案变化引入的误差相比，当采用洗入技术时，血流激活在推导血流值时引入的误差相对较小。
