By Khadija Ozair (Medical Physicist)
Abstract:
With the continuous advancement of radiotherapy techniques
such as Intensity Modulated Radiation Therapy (IMRT) and
Volumetric Modulated Arc Therapy (VMAT), ensuring
accurate and precise dose delivery remains a key factor in
achieving optimal clinical outcomes.
This study aims to
evaluate the accuracy and reliability of the Dolphin®-Compass
3D dosimetry system for patient-specific quality assurance
(PSQA) in prostate cancer treatment plans. Ten prostate cases
will be selected and verified using the Dolphin® Phantom
mounted on the Versa-HD Linear Accelerator. IMRT and
VMAT plans will be generated in the Monaco® Treatment
Planning System (version 6.1.3) utilizing 6 MV photon beams.
The Compass® software will perform a comprehensive 3D
gamma evaluation to compare measured and calculated dose
distributions. It is anticipated that the results will demonstrate
excellent gamma pass rates and a strong correlation between
measured and planned doses.
The outcomes of this study are
expected to validate the effectiveness of the
Dolphin®-Compass system as a robust, efficient, and accurate
QA tool, ensuring both geometric and dosimetric precision
before patient treatment. Ultimately, this work will highlight
the importance of advanced 3D PSQA systems in enhancing
treatment safety and maintaining the high standards required
for modern radiotherapy practice.
Keywords:
IMRT, VMAT, PSQA, Dolphin® Phantom, 3D Dosimetry,
Prostate Cancer