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The use of computed radiography for routine linear accelerator and simulator quality control
I Patel1, T Natarajan, S S Hassan
1North Western Medical Physics, Radiotherapy Department, Rosemere Cancer Centre, Lancashire Teaching Hospitals NHS Foundation Trust, Preston, UK. imran.patel@lthtr.nhs.uk
The British Journal of Radiology
|April 29, 2009
Summary
Computed radiography (CR) systems offer a viable alternative to film for linear accelerator and simulator quality control. This study demonstrates CR
Area of Science:
- Medical Physics
- Radiological Imaging Technology
Background:
- Computed radiography (CR) is established for clinical imaging.
- Limited research exists on CR for linear accelerator and simulator quality control.
Purpose of the Study:
- Evaluate the Kodak 2000RT CR system with Agfa plates as a film replacement for quality control.
- Characterize CR system behavior including uniformity, accuracy, signal decay, and dose-response.
Main Methods:
- Investigated spatial uniformity and accuracy reproducibility.
- Assessed plate signal decay over time and dose-response characteristics.
- Compared radiation field dimension measurements between CR and film.
Main Results:
- CR system performance was thoroughly characterized.
- Measurements of radiation field dimensions using CR agreed closely with film.
- Differences were within 0.1 mm for megavoltage and 0.3 mm for simulator images.
Conclusions:
- The Kodak 2000RT CR system is a suitable alternative to radiographic film for routine quality control.
- CR provides accurate and reproducible results for accelerator and simulator imaging.
- This validates CR for essential quality assurance in radiation therapy.
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