A Look-Up-Table Development to Facilitate CT Simulation of MR-Linac Treatment

Authors

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

Publication Date

1-1-2024

Journal

Physics and Imaging in Radiation Oncology

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.

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Associated Data

PMID: 38192414