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Breast Patient Setup Error Assessment: Comparison of Electronic Portal Image Devices and Cone-Beam Computed Tomography Matching Results by Rajko Topolnjak; Jan-Jakob Sonke; Jasper Nijkamp; Coen Rasch; Danny Minkema; Peter Remeijer; Corine van Vliet-Vroegindeweij is a Medicine article available to read on EtoBox.
What is Breast Patient Setup Error Assessment: Comparison of Electronic Portal Image Devices and Cone-Beam Computed Tomography Matching Results about?
Purpose: To quantify the differences in setup errors measured with the cone-beam computed tomography (CBCT) and electronic portal image devices (EPID) in breast cancer patients. Methods and Materials: Repeat CBCT scan were acquired for routine offline setup verification in 20 breast cancer patients. During the CBCT imaging fractions, EPID images of the treatment beams were recorded. Registrations of the bony anatomy for CBCT to planning CT and EPID to digitally reconstructed-radiographs (DRRs) were compared. In addition, similar measurements of an anthropomorphic thorax phantom were acquired. Bland-Altman and linear regression analysis were performed for clinical and phantom registrations. Systematic and random setup errors were quantified for CBCT and EPID-driven correction protocols in the EPID coordinate system (U, V), with V parallel to the cranial-caudal axis and U perpendicular to V and the central beam axis. Results: Bland-Altman analysis of clinical EPID and CBCT registrations yielded 4 to 6-mm limits of agreement, indicating that both methods were not compatible. The EPID-based setup errors were smaller than the CBCTbased setup errors. Phantom measurements showed that CBCT
Who reads Breast Patient Setup Error Assessment: Comparison of Electronic Portal Image Devices and Cone-Beam Computed Tomography Matching Results?
It is typically read by researchers, students, and practitioners in Medicine.
- Author
- Rajko Topolnjak; Jan-Jakob Sonke; Jasper Nijkamp; Coen Rasch; Danny Minkema; Peter Remeijer; Corine van Vliet-Vroegindeweij
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0360-3016)
- Published
- 2010
- Language
- EN
- Field
- Medicine (Health Sciences)