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

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 lo...

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Bibliographic Details
Published in:Physics and imaging in radiation oncology 2024-01, Vol.29, p.100524-100524, Article 100524
Main Authors: Hughes, Neil, Salzillo, Travis C., Vedam, Sastry, Lim, Tze Yee, Wang, Xin, Wang, He, Mohammedsaid, Mustefa, Fuller, Clifton D., Wang, Jihong, Yang, Jinzhong
Format: Article
Language:English
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Technical Note
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Summary: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.
ISSN:2405-6316
2405-6316
DOI:10.1016/j.phro.2023.100524