Localization accuracy and immobilization effectiveness of a stereotactic body frame for a variety of treatment sites

International Journal of Radiation Oncology, Biology, Physics
Ryan FosterTimothy Solberg

Abstract

The purpose of this study was to analyze the pretreatment setup errors and intrafraction motion using cone beam computed tomography (CBCT) for stereotactic body radiation therapy patients immobilized and localized with a stereotactic body frame for a variety of treatment sites. Localization errors were recorded for patients receiving SBRT for 141 lung, 29 liver, 48 prostate, and 45 spine tumors representing 1005 total localization sessions. All patients were treated in a stereotactic body frame with a large custom-molded vacuum pillow. Patients were first localized to the frame using tattoos placed during simulation. Subsequently, the frame was aligned to the room lasers according to the stereotactic coordinates determined from the treatment plan. Every patient received a pretreatment and an intrafraction CBCT. Abdominal compression was used for all liver patients and for approximately 40% of the lung patients to reduce tumor motion due to respiration. The mean ± standard deviation pretreatment setup errors from all localizations were -2.44 ± 3.85, 1.31 ± 5.84, and 0.11 ± 3.76 mm in the anteroposterior, superoinferior, and lateral directions, respectively. The mean pretreatment localization results among all treatment sites wer...Continue Reading

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Citations

Mar 31, 2016·International Journal of Radiation Oncology, Biology, Physics·Colien HazelaarWilko F A R Verbakel
Jul 1, 2015·Journal of Medical Imaging and Radiation Oncology·Matthew FooteDavid Thwaites
Jun 13, 2016·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Cristina GaribaldiRoberto Orecchia
May 16, 2017·Journal of Applied Clinical Medical Physics·Yoshihiro UedaIndra J Das
Dec 21, 2016·Journal of Medical Radiation Sciences·Catherine HubieRob Appleyard
Jun 27, 2020·Physical and Engineering Sciences in Medicine·James RijkenTanya Kairn
Sep 21, 2020·Radiotherapy and Oncology : Journal of the European Society for Therapeutic Radiology and Oncology·Anita M Werensteijn-HoninghPetra S Kroon
Jun 28, 2021·Physica Medica : PM : an International Journal Devoted to the Applications of Physics to Medicine and Biology : Official Journal of the Italian Association of Biomedical Physics (AIFB)·Kristin KarlssonGavin Poludniowski

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