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BioMed Research International
Volume 2018, Article ID 6415497, 8 pages
Research Article

Optical Surface Management System for Patient Positioning in Interfractional Breast Cancer Radiotherapy

1Department of Radiation Oncology, Yantai Yuhuangding Hospital, Yantai 264000, China
2Department of Medical Imaging, Yantai Yuhuangding Hospital, Yantai 264000, China

Correspondence should be addressed to Wei Zhang; moc.621@yhlfgnepux and Yipeng Song; moc.621@72177jpl

Received 26 July 2017; Accepted 16 November 2017; Published 9 January 2018

Academic Editor: Yujiang Fang

Copyright © 2018 Zhao Ma et al. This is an open access article distributed under the Creative Commons Attribution License, which permits unrestricted use, distribution, and reproduction in any medium, provided the original work is properly cited.


Background. The Optical Surface Management System (OSMS) is a simple, fast, reproducible, and accurate solution for patient set-up and can minimize random day-to-day set-up errors. However, studies in breast cancer patients are rare. Objective. To analyze 200 patient set-ups in 20 patients with breast cancer by comparing the OSMS with the conventional cone-beam computed tomography (CBCT). Method. Displacements from concurrent OSMS and CBCT registrations were compared in a total of 200 setups of 20 patients to analyze the interfractional displacement and positioning displacement in three dimensions (lateral, longitudinal, and vertical directions). Results. The interfractional displacement on the lateral, longitudinal, and vertical directions for OSMS versus CBCT was versus centimeters (cm); versus  cm; versus  cm, respectively, without any significant difference (all ). The duration for CBCT scan was about 60 seconds (s), while that for image processing, matching, and couch displacement was at least 5 minutes (min). The average scanning time with OSMS was less than 20 s, and the total duration for positioning was less than 1 min. Conclusion. OSMS is an efficient tool to improve the accuracy and increase the speed for verifying the patient positioning in radiotherapy for breast cancer.