Patient 3 CT

CTs and MRIs were both acquired under radiotherapy immobilization protocols with patients in the treatment position. CT scans were acquired on one of four machine models (LightSpeed RT16, GE Medical Systems, Waukesha, WI, USA; Brilliance 64 or Brilliance Big Bore, Philips Healthcare, Cambridge, MA, USA; SOMATOM Definition Edge, Siemens, Washington D.C., USA) using x-ray tube currents between 208 – 434 mA at 120 kVp. All scans have slice thicknesses of either 2.5 or 3 mm, with 2.5 or 3 mm of space between slices. Sections are displayed in 512 x 512 pixel matrices and were reconstructed in diameters between 500 – 600 mm. MRI scans were acquired in one of two machine models (Discovery MR750, GE Medical Systems, Waukesha, WI, USA; Ingenia, Philips Healthcare, Cambridge, MA, USA) in 3 Tesla magnetic fields with echo times between 97.72 – 101.82 milliseconds. All scans have slice thicknesses of 2.5 mm, with 2.5 or 4 mm of space between slices. Sections are displayed in 512 x 512 pixel matrices and were reconstructed in 256 mm diameters.

计算机断层扫描（CT，Computed Tomography）与磁共振成像（MRI，Magnetic Resonance Imaging）扫描均遵循放疗固定方案，以患者治疗体位完成采集。CT扫描采用四款机型之一完成：LightSpeed RT16（通用电气医疗系统，美国威斯康星州沃基肖市）、Brilliance 64或Brilliance Big Bore（飞利浦医疗，美国马萨诸塞州剑桥市）、SOMATOM Definition Edge（西门子，美国华盛顿特区），扫描参数为120千伏峰值（kVp）下，X线管电流介于208–434 mA。所有扫描的层厚为2.5 mm或3 mm，层间距同样为2.5 mm或3 mm；图像以512×512像素矩阵显示，重建视野直径介于500–600 mm之间。MRI扫描采用两款机型之一完成：Discovery MR750（通用电气医疗系统，美国威斯康星州沃基肖市）、Ingenia（飞利浦医疗，美国马萨诸塞州剑桥市），扫描场强为3特斯拉，回波时间介于97.72–101.82毫秒。所有扫描的层厚为2.5 mm，层间距为2.5 mm或4 mm；图像以512×512像素矩阵显示，重建视野直径为256 mm。