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Related Experiment Video

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Radiation Planning Assistant - A Web-based Tool to Support High-quality Radiotherapy in Clinics with Limited Resources

Radiation Planning Assistant - A Web-based Tool to Support High-quality Radiotherapy in Clinics with Limited Resources

Published on: October 6, 2023

Software tool for portal dosimetry research.

P Vial¹, P Hunt, P B Greer

¹Department of Medical Physics, Liverpool and Macarthur Cancer Therapy Centres, Sydney, Australia. philip.vial@sswahs.nsw.gov.au

Australasian Physical & Engineering Sciences in Medicine

|October 25, 2008

Summary

This summary is machine-generated.

A new software tool enhances electronic portal imaging device (EPID) dosimetry for intensity modulated radiation therapy (IMRT). It refines dose predictions by correcting for differences in radiation transmission through multileaf collimators (MLCs).

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Area of Science:

Medical Physics
Radiation Oncology
Software Development

Background:

Electronic portal imaging devices (EPIDs) are crucial for verifying radiation doses in intensity modulated radiation therapy (IMRT).
Existing portal dose image prediction (PDIP) models in treatment planning systems (TPS) require refinement to accurately account for complex beam modulation by multileaf collimators (MLCs).

Purpose of the Study:

To develop and validate a software tool that modifies TPS-integrated PDIP models for improved EPID dosimetry in IMRT.
To incorporate correction factors into predicted EPID images, addressing discrepancies caused by MLC-transmitted radiation.

Main Methods:

Implementation of a software tool using C# and the .NET framework within a commercial TPS.
Reading MLC files and PDIP data, calculating MLC shielding fractions, interpolating correction factors, and generating corrected PDIP images.
Validation of the software tool's operational performance.

Main Results:

The software successfully modifies PDIP models by applying correction factors to EPID images.
Generated corrected PDIP images accurately reflect EPID response to IMRT beams, considering MLC transmission.
The tool provides capabilities for displaying, analyzing, and exporting image datasets.

Conclusions:

The developed software tool offers valuable functionalities for EPID dosimetry research.
This tool enhances the accuracy of dose verification in IMRT and is actively used in ongoing research projects.
Further development of the software is ongoing for advanced EPID and IMRT dosimetry applications.