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Surface guided radiotherapy (SGRT) improves breast cancer patient setup accuracy

Kügele, Malin LU ; Mannerberg, Annika LU ; Nørring Bekke, Susanne ; Alkner, Sara LU ; Berg, Lovisa ; Mahmood, Faisal ; Thornberg, Charlotte LU ; Edvardsson, Anneli LU ; Bäck, Sven Å.J. LU and Behrens, Claus F. , et al. (2019) In Journal of Applied Clinical Medical Physics p.61-68
Abstract

Purpose: The purpose of the study was to investigate if surface guided radiotherapy (SGRT) can decrease setup deviations for tangential and locoregional breast cancer patients compared to conventional laser-based setup (LBS). Materials and Methods: Both tangential (63 patients) and locoregional (76 patients) breast cancer patients were enrolled in this study. For LBS, the patients were positioned by aligning skin markers to the room lasers. For the surface based setup (SBS), an optical surface scanning system was used for daily setup using both single and three camera systems. To compare the two setup methods, the patient position was evaluated using verification imaging (field images or orthogonal images). Results: For both tangential... (More)

Purpose: The purpose of the study was to investigate if surface guided radiotherapy (SGRT) can decrease setup deviations for tangential and locoregional breast cancer patients compared to conventional laser-based setup (LBS). Materials and Methods: Both tangential (63 patients) and locoregional (76 patients) breast cancer patients were enrolled in this study. For LBS, the patients were positioned by aligning skin markers to the room lasers. For the surface based setup (SBS), an optical surface scanning system was used for daily setup using both single and three camera systems. To compare the two setup methods, the patient position was evaluated using verification imaging (field images or orthogonal images). Results: For both tangential and locoregional treatments, SBS decreased the setup deviation significantly compared to LBS (P < 0.01). For patients receiving tangential treatment, 95% of the treatment sessions were within the clinical tolerance of ≤ 4 mm in any direction (lateral, longitudinal or vertical) using SBS, compared to 84% for LBS. Corresponding values for patients receiving locoregional treatment were 70% and 54% for SBS and LBS, respectively. No significant difference was observed comparing the setup result using a single camera system or a three camera system. Conclusions: Conventional laser-based setup can with advantage be replaced by surface based setup. Daily SGRT improves patient setup without additional imaging dose to breast cancer patients regardless if a single or three camera system was used.

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Contribution to journal
publication status
published
subject
keywords
interfraction motion, optical surface scanning, patient positioning, surface guided radiotherapy
in
Journal of Applied Clinical Medical Physics
pages
61 - 68
publisher
American College of Medical Physics
external identifiers
  • pmid:31478615
  • scopus:85071778367
ISSN
1526-9914
DOI
10.1002/acm2.12700
language
English
LU publication?
yes
id
af509197-ee5c-4e1b-bee8-d1e70a175808
date added to LUP
2019-09-27 09:57:23
date last changed
2020-01-22 07:46:57
@article{af509197-ee5c-4e1b-bee8-d1e70a175808,
  abstract     = {<p>Purpose: The purpose of the study was to investigate if surface guided radiotherapy (SGRT) can decrease setup deviations for tangential and locoregional breast cancer patients compared to conventional laser-based setup (LBS). Materials and Methods: Both tangential (63 patients) and locoregional (76 patients) breast cancer patients were enrolled in this study. For LBS, the patients were positioned by aligning skin markers to the room lasers. For the surface based setup (SBS), an optical surface scanning system was used for daily setup using both single and three camera systems. To compare the two setup methods, the patient position was evaluated using verification imaging (field images or orthogonal images). Results: For both tangential and locoregional treatments, SBS decreased the setup deviation significantly compared to LBS (P &lt; 0.01). For patients receiving tangential treatment, 95% of the treatment sessions were within the clinical tolerance of ≤ 4 mm in any direction (lateral, longitudinal or vertical) using SBS, compared to 84% for LBS. Corresponding values for patients receiving locoregional treatment were 70% and 54% for SBS and LBS, respectively. No significant difference was observed comparing the setup result using a single camera system or a three camera system. Conclusions: Conventional laser-based setup can with advantage be replaced by surface based setup. Daily SGRT improves patient setup without additional imaging dose to breast cancer patients regardless if a single or three camera system was used.</p>},
  author       = {Kügele, Malin and Mannerberg, Annika and Nørring Bekke, Susanne and Alkner, Sara and Berg, Lovisa and Mahmood, Faisal and Thornberg, Charlotte and Edvardsson, Anneli and Bäck, Sven Å.J. and Behrens, Claus F. and Ceberg, Sofie},
  issn         = {1526-9914},
  language     = {eng},
  pages        = {61--68},
  publisher    = {American College of Medical Physics},
  series       = {Journal of Applied Clinical Medical Physics},
  title        = {Surface guided radiotherapy (SGRT) improves breast cancer patient setup accuracy},
  url          = {http://dx.doi.org/10.1002/acm2.12700},
  doi          = {10.1002/acm2.12700},
  year         = {2019},
}