Patient 1 MRI

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.

CT与磁共振成像（MRI）均按照放疗固定方案采集，采集时患者处于治疗体位。CT扫描采用四种机型之一完成：美国威斯康星州沃基肖市通用电气医疗系统（GE Medical Systems）的LightSpeed RT16、美国马萨诸塞州剑桥市飞利浦医疗（Philips Healthcare）的Brilliance 64或Brilliance Big Bore、美国华盛顿特区西门子（Siemens）的SOMATOM Definition Edge；扫描参数为管电压120 kVp，管电流范围208–434 mA。所有CT扫描的层厚均为2.5 mm或3 mm，层间距为2.5 mm或3 mm，影像以512×512像素矩阵显示，重建视野直径介于500–600 mm之间。

磁共振成像扫描采用两种机型之一完成：美国威斯康星州沃基肖市通用电气医疗系统的Discovery MR750、美国马萨诸塞州剑桥市飞利浦医疗的Ingenia；扫描磁场强度为3特斯拉，回波时间范围97.72–101.82毫秒。所有MRI扫描的层厚均为2.5 mm，层间距为2.5 mm或4 mm，影像以512×512像素矩阵显示，重建视野直径为256 mm。