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Novel framework for determining TPS-calculated doses corresponding to detector locations using 3D camera in in vivo surface dosimetry

 Heesoon Sheen  ;  Ye-In Park  ;  Min-Seok Cho  ;  Junyoung Son  ;  Han-Back Shin  ;  Min Cheol Han  ;  Hojin Kim  ;  Ho Lee  ;  Dong Wook Kim  ;  Jin Sung Kim  ;  Chae-Seon Hong 
 PHYSICS IN MEDICINE AND BIOLOGY, Vol.68(5) : 055011, 2023-03 
Journal Title
Issue Date
Adult ; Breast Neoplasms* ; Cone-Beam Computed Tomography / methods ; Female ; Humans ; Models, Theoretical ; Phantoms, Imaging ; Radiation Dosimeters ; Radiometry* / methods
In vivo dosimetry ; detector ; optically stimulated luminescent dosimeter ; planned dose ; radiation therapy ; surface dose
Purpose. To address the shortcomings of current procedures for evaluating the measured-to-planned dose agreement in in vivo dosimetry (IVD), this study aimed to develop an accurate and efficient novel framework to identify the detector location placed on a patient’s skin surface using a 3D camera and determine the planned dose at the same anatomical position corresponding to the detector location. Methods. Breast cancer treatment was simulated using an anthropomorphic adult female phantom (ATOM 702D; CIRS, Norfolk, VA, USA). An optically stimulated luminescent dosimeter was used for surface dose measurements (MyOSLchip, RadPro International GmbH, Germany) at six IVD points. Three-dimensional surface imaging (3DSI) of the phantom with the detector was performed in the treatment position using a 3D camera. The developed framework, iSMART, was designed to import 3DSI and treatment planning data for determining the position of the IVD detectors in the 3D treatment planning DICOM image. The clinical usefulness of iSMART was evaluated in terms of accuracy and efficiency, for comparison with the results obtained using cone-beam computed tomography (CBCT) image guidance. Results. The relative dose difference between the planned doses determined using iSMART and CBCT images displayed similar accuracies (within approximately ±2.0%) at all detector locations. The relative dose differences between the planned and measured doses at the six detector locations ranged from -4.8% to 3.1% for the CBCT images and -3.5% to 2.1% for iSMART. The total time required to read the planned doses at six detector locations averaged at 8.1 and 0.8 min for the CBCT images and iSMART, respectively. Conclusions. The proposed framework can improve the robustness of IVD analyses and aid in accurate and efficient evaluations of the measured-to-planned dose agreement. © 2023 The Author(s). Published on behalf of Institute of Physics and Engineering in Medicine by IOP Publishing Ltd.
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1. College of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학교실) > 1. Journal Papers
Yonsei Authors
Kim, Dong Wook(김동욱) ORCID logo https://orcid.org/0000-0002-5819-9783
Kim, Jinsung(김진성) ORCID logo https://orcid.org/0000-0003-1415-6471
Kim, Hojin(김호진) ORCID logo https://orcid.org/0000-0002-4652-8682
Shin, Han-Back(신한백)
Lee, Ho(이호) ORCID logo https://orcid.org/0000-0001-5773-6893
Han, Min Cheol(한민철)
Hong, Chae-Seon(홍채선) ORCID logo https://orcid.org/0000-0001-9120-6132
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