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Intra- and Interfractional Variations for Prone Breast Irradiation: An Indication for Image-Guided Radiotherapy by Natalya V. Morrow; Christopher Stepaniak; Julia White; J. Frank Wilson; X. Allen Li is a Medicine article available to read on EtoBox.
What is Intra- and Interfractional Variations for Prone Breast Irradiation: An Indication for Image-Guided Radiotherapy about?
Purpose: Intra-and interfractional errors for breast cancer patients undergoing breast irradiation in the prone position were analyzed. Methods and Materials: To assess intrafractional error resulting from respiratory motion, four-dimensional computed tomography scans were acquired for 3 prone and 3 supine patients, and the respiratory motion was compared for the two positions. To assess the interfractional error caused by daily set-up variations, daily electronic portal images of one of the treatment beams were taken for 15 prone-positioned patients. Portal images were then overlaid with images from the planning system that included the breast contour and the isocenter, treatment beam portal, and isocenter. The shift between the planned and actual isocenter was recorded for each portal image, and descriptive statistics were collected for each patient. The margins were calculated using the 2S þ 0:7s recipe, as well as 95% confidence interval based on the pooled standard deviation of the datasets. Results: Respiratory motion of the chest wall is drastically reduced from 2.3 ± 0.9 mm in supine position to À0.1 ± 0.4 mm in prone position. The daily set-up errors vary in magnitude from
Who reads Intra- and Interfractional Variations for Prone Breast Irradiation: An Indication for Image-Guided Radiotherapy?
It is typically read by researchers, students, and practitioners in Medicine.
- Author
- Natalya V. Morrow; Christopher Stepaniak; Julia White; J. Frank Wilson; X. Allen Li
- Publisher
- Elsevier Science; Elsevier ; Elsevier BV (ISSN 0360-3016)
- Published
- 2007
- Language
- EN
- Field
- Medicine (Health Sciences)