New complete geometrical rapid-test for radiation therapy equipment

Area of Science:

• Medical Physics
• Radiation Oncology
• Radiotherapy Equipment Testing

Background:

• Geometrical performance tolerances are critical for the accuracy and safety of isocentric radiotherapy units.
• Current testing procedures for these tolerances can be time-consuming and complex, impacting routine quality assurance.
• Efficient and accurate methods are needed to ensure consistent performance of radiotherapy equipment.

Purpose of the Study:

• To introduce a novel, time-sparing, and comprehensive test procedure for evaluating geometrical performance tolerances of isocentric radiotherapy units.
• To simplify the process of daily, weekly, and monthly quality assurance testing.
• To enhance the accuracy and efficiency of isocentric radiotherapy unit performance verification.

Main Methods:

• Development and implementation of a simple auxiliary device for rapid testing.
• Conducting tests at the isocentre under multiple conditions using a single ready-pack film.
• Evaluation of isocentre alignment, field-sizes, scales, and optical indicating instruments.

Main Results:

• The new procedure significantly reduces testing time for geometrical performance tolerances.
• It allows for an exact and rapid assessment of critical parameters including isocentre, field-sizes, and scales.
• The method effectively tests optical beam and isocentre indicating instruments with minimal film requirements.

Conclusions:

• The proposed comprehensive test procedure offers a significant improvement in efficiency and simplicity for radiotherapy unit quality assurance.
• This method facilitates more frequent and thorough testing of geometrical performance tolerances, enhancing patient safety.
• The use of a simple auxiliary device and minimal film makes the procedure practical for routine clinical application.