King M A, Tsui B M, Pan T S, Glick S J, Soares E J
Department of Nuclear Medicine, University of Massachusetts Medical Center, Worcester 01655, USA.
J Nucl Cardiol. 1996 Jan-Feb;3(1):55-64. doi: 10.1016/s1071-3581(96)90024-0.
Attenuation is believed to be one of the major causes of false-positive cardiac single-photon emission computed tomographic perfusion images. This article provides an introduction to the approaches used to correct for nonuniform attenuation once a patient-specific attenuation map is available. Comparison is made of specific attenuation-correction algorithms from each of three major categories of compensation methods that are or will be available commercially. Examples of the use of the algorithms on simulated projections of a mathematic phantom modeling the anatomy of the upper torso are used to illustrate the ability of the methods to compensate for attenuation. The advantages and disadvantages of each approach are summarized, as well as areas that need further investigation.
衰减被认为是心脏单光子发射计算机断层扫描灌注图像假阳性的主要原因之一。本文介绍了在获得患者特异性衰减图后用于校正非均匀衰减的方法。对三种主要补偿方法类别中每种方法的特定衰减校正算法进行了比较，这些方法已商业化或即将商业化。使用算法对模拟上半身解剖结构的数学模型的投影进行处理的示例，以说明这些方法补偿衰减的能力。总结了每种方法的优缺点以及需要进一步研究的领域。
