Converting treatment plans for Ring gantry Linac to L-shape Linac

This research aims to develop a method for converting Intensity-Modulated Radiation Therapy treatment plans from a Ring gantry linear accelerator to an L-shape linear accelerator to prevent treatment delays during machine malfunctions, utilizing Equivalent MLC Conversion and Fluence Map Generation methods. The study focuses on comparing the effectiveness and suitability of these methods to determine the most appropriate approach for each specific disease site. The findings indicate that while the EMC approach proves effective for cervical and prostate cancers, the FMG method is applicable to a broader range of anatomical sites and demonstrates a superior capacity in sparing dose to organs at risk.