Nepper-Rasmussen J, Mosekilde L
Department of Neuroradiology, AArhus Kommunehospital, Denmark.
Acta Radiol. 1989 Jul-Aug;30(4):369-71.
Twelve lumbar vertebral bodies from cadavers were examined with dual-energy CT, to measure the calcium content in a big central region of interest (ROI). In each of five vertebrae the calcium content was also measured in six small ROI. After completed scanning, six small cylinders were drilled out from each vertebra, and the ash-density of each cylinder was measured. The dual-energy CT measurements correlated well with the ash-density. Both ash-density and dual-energy CT showed a significantly higher mineral content in the posterior part of the vertebrae than in the anterior part, and this difference might be responsible for problems encountered with the reproducibility of dual-energy CT.
对12个来自尸体的腰椎椎体进行双能CT检查，以测量一个大的中央感兴趣区域（ROI）的钙含量。在五个椎体中的每个椎体上，还在六个小ROI中测量了钙含量。扫描完成后，从每个椎体中钻出六个小圆柱体，并测量每个圆柱体的灰分密度。双能CT测量结果与灰分密度相关性良好。灰分密度和双能CT均显示椎体后部的矿物质含量明显高于前部，这种差异可能是双能CT再现性方面出现问题的原因。
