Comparison of User-Directed and Automatic Mapping of the Planned Isocenter to Treatment Space for Prostate IGRT
Joint Authors
Chen, Ronald
Foskey, Mark
Kress, Andrea
Xu, Zijie
Yan, Di
Qin, An
Wang, Andrew
Chaney, Edward
Cullip, Timothy
Chang, Sha
Tracton, Gregg
Tepper, Joel E.
Source
International Journal of Biomedical Imaging
Issue
Vol. 2013, Issue 2013 (31 Dec. 2013), pp.1-12, 12 p.
Publisher
Hindawi Publishing Corporation
Publication Date
2013-11-21
Country of Publication
Egypt
No. of Pages
12
Main Subjects
Abstract EN
Image-guided radiotherapy (IGRT), adaptive radiotherapy (ART), and online reoptimization rely on accurate mapping of the radiation beam isocenter(s) from planning to treatment space.
This mapping involves rigid and/or nonrigid registration of planning (pCT) and intratreatment (tCT) CT images.
The purpose of this study was to retrospectively compare a fully automatic approach, including a non-rigid step, against a user-directed rigid method implemented in a clinical IGRT protocol for prostate cancer.
Isocenters resulting from automatic and clinical mappings were compared to reference isocenters carefully determined in each tCT.
Comparison was based on displacements from the reference isocenters and prostate dose-volume histograms (DVHs).
Ten patients with a total of 243 tCTs were investigated.
Fully automatic registration was found to be as accurate as the clinical protocol but more precise for all patients.
The average of the unsigned x, y, and z offsets and the standard deviations (σ) of the signed offsets computed over all images were (avg.
± σ (mm)): 1.1 ± 1.4, 1.8 ± 2.3, 2.5 ± 3.5 for the clinical protocol and 0.6 ± 0.8, 1.1 ± 1.5 and 1.1 ± 1.4 for the automatic method.
No failures or outliers from automatic mapping were observed, while 8 outliers occurred for the clinical protocol.
American Psychological Association (APA)
Xu, Zijie& Chen, Ronald& Wang, Andrew& Kress, Andrea& Foskey, Mark& Qin, An…[et al.]. 2013. Comparison of User-Directed and Automatic Mapping of the Planned Isocenter to Treatment Space for Prostate IGRT. International Journal of Biomedical Imaging،Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-505905
Modern Language Association (MLA)
Xu, Zijie…[et al.]. Comparison of User-Directed and Automatic Mapping of the Planned Isocenter to Treatment Space for Prostate IGRT. International Journal of Biomedical Imaging No. 2013 (2013), pp.1-12.
https://search.emarefa.net/detail/BIM-505905
American Medical Association (AMA)
Xu, Zijie& Chen, Ronald& Wang, Andrew& Kress, Andrea& Foskey, Mark& Qin, An…[et al.]. Comparison of User-Directed and Automatic Mapping of the Planned Isocenter to Treatment Space for Prostate IGRT. International Journal of Biomedical Imaging. 2013. Vol. 2013, no. 2013, pp.1-12.
https://search.emarefa.net/detail/BIM-505905
Data Type
Journal Articles
Language
English
Notes
Includes bibliographical references
Record ID
BIM-505905