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Strahlentherapie und Onkologie
Published in: Strahlentherapie und Onkologie 11/2019

01-11-2019 | Breast Cancer | Original Article

Impact of surface-guided positioning on the use of portal imaging and initial set-up duration in breast cancer patients

Authors: Montserrat Pazos, Franziska Walter, Daniel Reitz, Stephan Schönecker, Dinah Konnerth, Annemarie Schäfer, Maya Rottler, Filippo Alongi, Philipp Freislederer, Maximilian Niyazi, Claus Belka, Stefanie Corradini

Published in: Strahlentherapie und Onkologie | Issue 11/2019

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Abstract

Objective

The impact of optical surface guidance on the use of portal imaging and the initial set-up duration in patients receiving postoperative radiotherapy of the breast or chest wall was investigated.

Material and methods

A retrospective analysis was performed including breast cancer patients who received postoperative radiotherapy between January 2016 and December 2016. One group of patients received treatment before the optical surface scanner was installed (no-OSS) and the other group was positioned using the additional information derived by the optical surface scanner (OSS). The duration of the initial set-up was recorded for each patient and a comparison of both groups was performed. Accordingly, the differences between planned and actually acquired portal images during the course of radiotherapy were compared between both groups.

Results

A total of 180 breast cancer patients were included (90 no-OSS, 90 OSS) in this analysis. Of these, 30 patients with left-sided breast cancer received radiotherapy in deep inspiration breath hold (DIBH). The mean set-up time was 10 min and 18 s and no significant difference between the two groups of patients was found (p = 0.931). The mean set-up time in patients treated without DIBH was 9 min and 45 s compared to 13 min with DIBH (p < 0.001), as portal imaging was performed in DIBH. No significant difference was found in the number of acquired to the planned number of portal images during the entire radiotherapy treatment for both groups (p = 0.287).

Conclusion

Optical surface imaging is a valuable addition for primary patient set-up. The findings confirm that the addition of surface-based imaging did not prolong the clinical workflow and had no significant impact on the number of portal verification images carried out during the course of radiotherapy.
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Metadata
Title
Impact of surface-guided positioning on the use of portal imaging and initial set-up duration in breast cancer patients
Authors
Montserrat Pazos
Franziska Walter
Daniel Reitz
Stephan Schönecker
Dinah Konnerth
Annemarie Schäfer
Maya Rottler
Filippo Alongi
Philipp Freislederer
Maximilian Niyazi
Claus Belka
Stefanie Corradini
Publication date
01-11-2019
Publisher
Springer Berlin Heidelberg
Published in
Strahlentherapie und Onkologie / Issue 11/2019
Print ISSN: 0179-7158
Electronic ISSN: 1439-099X
DOI
https://doi.org/10.1007/s00066-019-01494-x

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