Young S W, Muller H H, Marshall W H
Radiology. 1983 Jul;148(1):279-83. doi: 10.1148/radiology.148.1.6856849.
Phantoms designed to simulate cysts or avascular masses and other material encountered in computed tomographic (CT) body and head scanning were used to evaluate the effect of beam hardening in a GE CT/T 8800 scanner. The phantoms were scanned before and after the addition of iodinated contrast material to various compartments within the phantoms. The results indicate that in general the addition of contrast material in the CT body phantom resulted in a decrease in the CT numbers recorded from the cyst phantoms. Conversely, the addition of contrast material in a concentric peripheral cylinder (simulating the addition or presence of the calvarium in CT head scanning) resulted in a generalized inhomogeneous increase in CT numbers of specimen materials contained in that ring.
为模拟计算机断层扫描（CT）身体和头部扫描中遇到的囊肿、无血管肿块及其他物质而设计的体模，被用于评估GE CT/T 8800扫描仪中的束硬化效应。在向体模内不同隔室添加碘化造影剂之前和之后，对体模进行扫描。结果表明，一般而言，在CT身体体模中添加造影剂会导致囊肿体模记录的CT值降低。相反，在同心外周圆柱体中添加造影剂（模拟CT头部扫描中颅骨的添加或存在）会导致该环内所含标本材料的CT值普遍不均匀增加。
