Investigating the reproducibility of a complex multifocal radiosurgery treatment

7th International Conference on 3D Radiation Dosimetry

Niebanck, M.^1 ; Juang, T.^1 ; Newton, J.^1 ; Adamovics, J.^2 ; Wang, Z.^1 ; Oldham, M.^1

Duke University Medical Center, Durham, NC, United States^1

Rider University, Lawerenceville, NJ, United States^2

关键词: Multiple targets;    Patient comfort;    Radiosurgery;    Reproducibilities;    Standard deviation;    Stereotactic radiosurgery;    Treatment plans;    Treatment verification;   

Others  :  https://iopscience.iop.org/article/10.1088/1742-6596/444/1/012072/pdf
DOI  :  10.1088/1742-6596/444/1/012072

来源: IOP

【 摘 要 】

Stereotactic radiosurgery has become a widely used technique to treat solid tumors and secondary metastases of the brain. Multiple targets can be simultaneously treated with a single isocenter in order to reduce the set-up time to improve patient comfort and workflow. In this study, a 5-arc multifocal RapidArc treatment was delivered to multiple PRESAGE® dosimeters in order to explore the repeatability of the treatment. The three delivery measurements agreed well with each other, with less than 3% standard deviation of dose in the target. The deliveries also agreed well with the treatment plan, with gamma passing rates greater than 90% (5% dose-difference, and 2 mm distance-to-agreement criteria). The optical-CT PRESAGE® system provided a reproducible measurement for treatment verification, provided measurements were made immediately following treatment.