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

Neil Hughes; Travis C Salzillo; Sastry Vedam; Tze Yee Lim; Xin Wang; He Wang; Mustefa Mohammedsaid; Clifton D Fuller; Jihong Wang; Jinzhong Yang

doi:10.1016/j.phro.2023.100524

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

Phys Imaging Radiat Oncol. 2023 Dec 15:29:100524. doi: 10.1016/j.phro.2023.100524. eCollection 2024 Jan.

Authors

Affiliations

¹ Radiation Therapy Program, MD Anderson Cancer Center School of Health Professions, Houston, TX, United States.
² Department of Radiation Physics, MD Anderson Cancer Center, Houston, TX, United States.
³ Department of Radiation Oncology, MD Anderson Cancer Center, Houston, TX, United States.

Abstract

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.

Associated data

figshare/10.6084/m9.figshare.24777396)

Abstract

Associated data

Grants and funding