Stern D, Zamenhof R, Dawson-Hughes B
Department of Veterans Affairs, Medical Center, Palo Alto, California.
Osteoporos Int. 1993 Sep;3(5):283-5. doi: 10.1007/BF01623834.
A 69-year-old woman presented with a 20-year history of back pain and a 10 cm height loss. She had received an injection of the contrast agent, Thorotrast, at age 23. There was no history of fluoride exposure. Multiple vertebral compression fractures were seen on radiographs. Dual-energy X-ray absorptiometry (DXA) scans revealed high normal bone mineral content on the spine and, on whole body scan, visualization of the liver and spleen regions. Given the attenuation coefficient of thorium and the thorium concentrations reported for liver, spleen and vertebral bodies, it is likely that thorium was visualized in the liver and spleen and that it caused spurious elevation in her DXA bone mineral content values.
一名69岁女性，有20年背痛病史，身高降低了10厘米。她23岁时曾注射过造影剂钍胶体。无氟暴露史。X线片显示多个椎体压缩性骨折。双能X线吸收法（DXA）扫描显示脊柱骨矿物质含量正常偏高，全身扫描可见肝脏和脾脏区域显影。鉴于钍的衰减系数以及报道的肝脏、脾脏和椎体中的钍浓度，很可能钍在肝脏和脾脏中显影，并导致她的DXA骨矿物质含量值出现假性升高。
