Brilliance ct

The patients were immobilized by head neck shoulder thermoplastic mask at comfortable position. CT-sim scan was completed with Philips Brilliance CT or GE Light Speed, and scan layer thickness was 3 mm. After CT-sim scan, MRI scan was obtained in the same posture and immobilization mode with SIEMENS Verio 3.0 T. The parameters of MRI scan were as follow: layer thickness 1.5 mm, layer space 0.45 mm, field of view (FOV) = 230 × 230 mm, TR 1440 ms, TE 11 ms, flip angle (FA) 150 degree, scan matrix 320 × 320, the rotation angle 90 degree, voxel size = 1.0 × 0.7 × 1.5 mm³. CT-sim and MRI scan images were transmitted into RayStation4.0 v (RaySearch Laboratories AB), then the CT and MRI images were fused and reconstructed for target and OARs delineation.

Five AMB patients (18 years of age and older) who were confirmed by pathology and treated with HT from June 2015 to October 2016 at Zhejiang Cancer Center were enrolled in the study. The Chang staging system [9 (link)] was used to evaluate the patients. Acute toxicity was evaluated with Common Toxicity Criteria (CTC) V4.0, and the last follow-up time was in January 2018. Patients were immobilized by the head, neck, and shoulder, and they wore body thermoplastic masks. CT-simulation equipment was used (i.e., Philips Brilliance CT or GE Light Speed), and the scanning range was from the top of the head to the ossa sedentarium. The simulation images were transmitted to an Accuray CT Planning Station Hi-Art Version 5.1.0 workstation, RayStation 4.0V, and Pinnacle Version 9.2 workstation.