Prediction of conical collimator collision for stereotactic radiosurgery
| Autor: | Sangroh Kim, M. Saiful Huq, Jeong-Hoon Park, Ryan McDermott |
|---|---|
| Rok vydání: | 2020 |
| Předmět: |
medicine.medical_treatment
stereotactic radiosurgery Coordinate system Radiosurgery 030218 nuclear medicine & medical imaging law.invention collision prediction conical collimator 03 medical and health sciences Imaging Three-Dimensional 0302 clinical medicine Software Optics Beam (nautical) law Beam's eye view medicine Humans Radiation Oncology Physics Radiology Nuclear Medicine and imaging Instrumentation Physics Radiation business.industry Radiotherapy Planning Computer-Assisted Isocenter Collimator Conical surface 030220 oncology & carcinogenesis business |
| Zdroj: | Journal of Applied Clinical Medical Physics |
| ISSN: | 1526-9914 |
| DOI: | 10.1002/acm2.12963 |
| Popis: | The purpose of this study is to predict the collision clearance distance of stereotactic cones with treatment setup devices in cone‐based stereotactic radiosurgery (SRS). The BrainLAB radiosurgery system with a Frameless Radiosurgery Positioning Array and dedicated couch top was targeted in this study. The positioning array and couch top were scanned with CT simulators, and their outer contours of were detected. The minimum clearance distance was estimated by calculating the Euclidian distances between the surface of the SRS cones and the nearest surface of the outer contours. The coordinate transformation of the outer contour was performed by incorporating the Beam's Eye View at a planned arc range and couch angle. From the minimum clearance distance, the collision‐free gantry ranges for each couch angle were sequentially determined. An in‐house software was developed to calculate the clearance distance between the cone surface and the outer contours, and thus determine the occurrence of a collision. The software was extensively tested for various combinations of couch and arc angles at multiple isocenter locations for two combinations of cone‐couch systems. A total of 50 arcs were used to validate the calculation accuracies of the software for each system. The calculated minimum distances and collision‐free angles from the software were verified by physical measurements. The calculated minimum distances were found to agree with the measurements to within 0.3 ± 0.9 mm. The collision‐free arc angles from the software also agreed with the measurements to within 1.1 ± 1.1° with a 5‐mm safety margin for 20 arcs. In conclusion, the in‐house software was able to calculate the minimum clearance distance with |
| Databáze: | OpenAIRE |
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