We advise that if only DBS is considered, the O-arm application might be more suitable. on behalf of American Association of Physicists in Medicine. Conclusion: This is the first study reporting on CT-Airo application in DBS. Journal of Applied Clinical Medical Physics published by Wiley Periodicals, Inc. © 2018 Orlando Health UF Health Cancer Center. Comparison of the stoichiometric-based AIRO SPR curve and the "dose-adjusted" SPR curve showed slight improvement on gamma analysis between the treatment plan and the AIRO plan for single-field plans at the 1%, 1 mm level, but did not affect clinical plans indicating that HU number differences between the CT Sim and AIRO did not affect dose calculations for robust clinical beam arrangements.īased on this study, we believe the AIRO can be used offline for adaptive proton therapy on a compact double scattering proton therapy system.Īdaptive proton therapy adaptive re-planning hounsfield unit mobile CT stopping power ratios. To create equivalent dose distributions on both data sets, the AIRO SPR curve's low-density data points were iteratively adjusted to yield better proton beam range agreement based on isodose lines. Dose calculated on AIRO CT scans with stoichiometric-based SPR curves produced over-ranged proton beams when large volumes of low-density material were in the path of the beam. Low-density materials demonstrated largest differences. Gamma analysis was used to evaluate dosimetric deviation between both plans.ĪIRO CT values skewed toward solid water when plugs were scanned surrounded by other plugs in phantom. Clinically realistic treatment plans and nonclinical plans were generated on the CT Sim images and subsequently copied onto the AIRO CT scans for dose recalculation and comparison for various AIRO SPR curves. DoseLAB software v.6.6 was utilized for image quality analysis. A RANDO anthropomorphic thorax, pelvis, and head phantom, and a CIRS thorax and head phantom were scanned on the CT Sim and AIRO. Methods Five CT images of a Catphan ® 504 phantom were acquired on the AIRO Mobile CT System, Varian EDGE radiosurgery system cone beam CT (CBCT), Philips Brilliance Big Bore 16 slice CT simulator, and Siemens SOMATOM Definition AS 20 slice CT simulator. We are digitizing all of our user guides to make accessing and locating important product information faster and easier. AIRO-specific CT-stopping power ratio (SPR) curves were created with a commonly used stoichiometric method using the Gammex phantom. To describe the commissioning of AIRO mobile CT system (AIRO) for adaptive proton therapy on a compact double scattering proton therapy system.Ī Gammex phantom was scanned with varying plug patterns, table heights, and mAs on a CT simulator (CT Sim) and on the AIRO.
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