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SU-E-T-431: Investigation of BrachyVision™ Acuros™ Using Varian Surface Applicators
S Simiele1, R Fulkerson1, J Micka1
1University of WI- Madison/ADCL, Madison, WI.
Medical Physics
|May 19, 2017
Summary
Varian Medical Systems
Area of Science:
- Medical Physics
- Radiation Oncology
- Brachytherapy
Background:
- Conical brachytherapy surface applicators are used for conformal dose delivery in treating surface lesions.
- Treatment planning for these applicators utilizes BrachyVision Acuros software.
- Limited clinical studies exist for Acuros in brachytherapy treatment planning.
Purpose of the Study:
- To compare dose distributions calculated by BrachyVision Acuros with Monte Carlo simulations and experimental measurements.
- To validate the accuracy of Acuros for conical brachytherapy surface applicators.
Main Methods:
- Treatment plans were created using Acuros in a virtual water phantom.
- Monte Carlo simulations (MCNP5) were performed for dose distribution characterization.
- Experimental verification used ionization chambers, TLDs, and film for depth-dose and surface dose measurements.
Main Results:
- Surface dose distributions showed a central peak with rapid fall-off.
- Acuros-calculated percentage depth-dose curves were within 3.7%-5.8% of Monte Carlo and measured values for 30mm and 35mm applicators.
Conclusions:
- BrachyVision Acuros accurately calculates depth-dose and surface dose distributions for simple water phantom cases with surface applicators.
- Further investigation into additional treatment geometries and applicators is warranted.
