Y Ding, J Holmes, B Li, C E Vargas, S A Vora, W W Wong, M Fatyga, R L Foote, S H Patel, W Liu
PURPOSE/OBJECTIVE(S): In some proton therapy facilities, patient alignment relies on two 2D orthogonal kV images, taken at fixed, oblique angles, as no 3D on-the-bed-imaging is available. The visibility of the tumor in kV images is limited since the patient's 3D anatomy is projected onto a 2D plane, especially when the tumor is behind a high-density structure such as bone. This can lead to a large patient setup error. A solution to this problem is to reconstruct the 3D CT image from the kV images obtained in the treatment position...
October 1, 2023: International Journal of Radiation Oncology, Biology, Physics