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Analysis of the treatment plan evaluation process in radiotherapy through eye tracking

Kyroudi, Archonteia ; Petersson, Kristoffer LU ; Ozsahin, Mahmut ; Bourhis, Jean ; Bochud, François and Moeckli, Raphaël (2018) In Zeitschrift fur Medizinische Physik 28(4). p.318-324
Abstract

Background and purpose: Treatment plan evaluation is a clinical decision-making problem that involves visual search and analysis in a contextually rich environment, including delineated structures and isodose lines superposed on CT data. It is a two-step process that includes visual analysis and clinical reasoning. In this work, we used eye tracking methods to gain more knowledge about the treatment plan evaluation process in radiation therapy. Materials and methods: Dose distributions on a single transverse slice of ten prostate cancer treatment plans were presented to eight decision makers. Their eye movements and fixations were recorded with an EyeLink1000 remote eye-tracker. Total evaluation time, dwell time, number and duration of... (More)

Background and purpose: Treatment plan evaluation is a clinical decision-making problem that involves visual search and analysis in a contextually rich environment, including delineated structures and isodose lines superposed on CT data. It is a two-step process that includes visual analysis and clinical reasoning. In this work, we used eye tracking methods to gain more knowledge about the treatment plan evaluation process in radiation therapy. Materials and methods: Dose distributions on a single transverse slice of ten prostate cancer treatment plans were presented to eight decision makers. Their eye movements and fixations were recorded with an EyeLink1000 remote eye-tracker. Total evaluation time, dwell time, number and duration of fixations on pre-segmented areas of interest were measured. Results: The main structures receiving more and longer fixations (PTV, rectum, bladder) correspond to the main trade-offs evaluated in a typical prostate plan. Radiation oncologists made more fixations on the main structures compared to the medical physicists. Radiation oncologists fixated longer on the rectum when visited for the first time, while medical physicists fixated longer on the bladder. Conclusion: Our results quantify differences in the visual evaluation patterns between radiation oncologists and medical physicists, which indicate differences in their decision making strategies.

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author
; ; ; ; and
publishing date
type
Contribution to journal
publication status
published
keywords
Decision making, Eye tracking, Plan quality, Prostate
in
Zeitschrift fur Medizinische Physik
volume
28
issue
4
pages
318 - 324
publisher
Elsevier
external identifiers
  • scopus:85038806971
  • pmid:29275899
ISSN
0939-3889
DOI
10.1016/j.zemedi.2017.11.002
language
English
LU publication?
no
additional info
Publisher Copyright: © 2018
id
0a10788d-02a6-4204-9b0a-5c574978ccb0
date added to LUP
2021-11-03 18:15:51
date last changed
2024-04-20 15:38:11
@article{0a10788d-02a6-4204-9b0a-5c574978ccb0,
  abstract     = {{<p>Background and purpose: Treatment plan evaluation is a clinical decision-making problem that involves visual search and analysis in a contextually rich environment, including delineated structures and isodose lines superposed on CT data. It is a two-step process that includes visual analysis and clinical reasoning. In this work, we used eye tracking methods to gain more knowledge about the treatment plan evaluation process in radiation therapy. Materials and methods: Dose distributions on a single transverse slice of ten prostate cancer treatment plans were presented to eight decision makers. Their eye movements and fixations were recorded with an EyeLink1000 remote eye-tracker. Total evaluation time, dwell time, number and duration of fixations on pre-segmented areas of interest were measured. Results: The main structures receiving more and longer fixations (PTV, rectum, bladder) correspond to the main trade-offs evaluated in a typical prostate plan. Radiation oncologists made more fixations on the main structures compared to the medical physicists. Radiation oncologists fixated longer on the rectum when visited for the first time, while medical physicists fixated longer on the bladder. Conclusion: Our results quantify differences in the visual evaluation patterns between radiation oncologists and medical physicists, which indicate differences in their decision making strategies.</p>}},
  author       = {{Kyroudi, Archonteia and Petersson, Kristoffer and Ozsahin, Mahmut and Bourhis, Jean and Bochud, François and Moeckli, Raphaël}},
  issn         = {{0939-3889}},
  keywords     = {{Decision making; Eye tracking; Plan quality; Prostate}},
  language     = {{eng}},
  number       = {{4}},
  pages        = {{318--324}},
  publisher    = {{Elsevier}},
  series       = {{Zeitschrift fur Medizinische Physik}},
  title        = {{Analysis of the treatment plan evaluation process in radiotherapy through eye tracking}},
  url          = {{http://dx.doi.org/10.1016/j.zemedi.2017.11.002}},
  doi          = {{10.1016/j.zemedi.2017.11.002}},
  volume       = {{28}},
  year         = {{2018}},
}