A look-up-table development to facilitate CT simulation of MR-Linac treatment

作者：Neil Hughes, Travis C. Salzillo, Sastry Vedam, Tze Yee Lim, X. Wang, He Wang, Mustefa Mohammedsaid, Clifton D. Fuller, Jihong Wang, Jinzhong Yang · 发表于：Physics and Imaging in Radiation Oncology · 年份：2023 · DOI：10.1016/j.phro.2023.100524 · 被引用次数：2 · 研究领域：Advanced Radiotherapy Techniques、Medical Imaging Techniques and Applications、Advanced X-ray and CT Imaging

While current MR-Linac (MRL) treatment workflows utilize a large table overlay during CT simulation to convert indexing between the two machines, we developed a look-up-table (LUT) as an alternative approach. After populating the LUT, index conversion factors were verified at three separate table locations. The resultant root-mean-square isocenter shifts on the MRL were 0.04/0.08 cm, 0.08/0.07 cm, and 0.09/0.08 cm with/without using the table overlay during simulation in the lateral, longitudinal, and vertical directions, respectively, which is within registration tolerance. Clinical implementation of the LUT has resulted in a more efficient MRL treatment workflow while maintaining accurate patient setup.