Patient 15 CT

CTs and MRIs were both acquired under radiotherapy immobilization protocols with patients in the treatment position.<br>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. <br>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）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4款机型之一完成：LightSpeed RT16（通用电气医疗系统公司，美国威斯康星州沃基肖）、Brilliance 64或Brilliance Big Bore（飞利浦医疗保健公司，美国马萨诸塞州剑桥）以及SOMATOM Definition Edge（西门子公司，美国华盛顿特区），扫描时X线管电流设置为208–434 mA，管电压为120 kVp。所有扫描的层厚均为2.5 mm或3 mm，层间距为2.5 mm或3 mm。图像以512×512像素矩阵显示，重建视野直径为500–600 mm。

MRI扫描采用两款机型之一完成：Discovery MR750（通用电气医疗系统公司，美国威斯康星州沃基肖）以及Ingenia（飞利浦医疗保健公司，美国马萨诸塞州剑桥），扫描磁场强度为3特斯拉，回波时间为97.72–101.82毫秒。所有扫描的层厚均为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。