Moss A A, Filly R A, Way L W
J Comput Assist Tomogr. 1980 Dec;4(6):827-31. doi: 10.1097/00004728-198012000-00015.
An in vitro investigation of gallstones from 25 patients using computed tomography (CT) was performed). An abdominal phantom was constructed and filled with a matrix with an attenuation value equivalent to normal liver. A condom filled with water and positioned within the phantom simulated the gallbladder. Gallstones were placed in the condom and were scanned, radiographed, measured, and inspected. All gallstones were detectable by CT as filling defects within the condom having CT attenuation values higher or lower than water. Attenuation values ranged from +178 to -188 CT units (scale, +500 to -500). Gallstones containing calcium settled to the bottom of the condom, while calculi containing gas filled fissures rose to the top of the condom.
对25名患者的胆结石进行了计算机断层扫描（CT）体外研究。构建了一个腹部模型，并用衰减值相当于正常肝脏的基质填充。一个装满水并放置在模型内的避孕套模拟胆囊。将胆结石放入避孕套中进行扫描、射线照相、测量和检查。所有胆结石在CT上均表现为避孕套内的充盈缺损，其CT衰减值高于或低于水。衰减值范围为+178至-188 CT单位（范围，+500至-500）。含钙的胆结石沉淀在避孕套底部，而含气隙的结石则升至避孕套顶部。
