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Inter-observer variation in target volume for salvage radiotherapy in recurrent prostate cancer patients after radical prostatectomy using CT versus combined CT and MRI: a multicenter study (KROG 13-11)

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Author(s)
Eonju LeeWon ParkSung Hwan AhnJae Ho ChoJin Hee KimKwan Ho ChoYoung Min ChoiJae-Sung KimJin Ho KimHong-Seok JangYoung-Seok KimTaek-Keun Nam
Keimyung Author(s)
Kim, Jin Hee
Department
Dept. of Radiation Oncology (방사선종양학)
Journal Title
Radiation Oncology Journal
Issued Date
2018
Volume
36
Issue
1
Keyword
Interobserver variationMagnetic resonance imageProstate cancerSalvage radiotherapyTarget volume
Abstract
PURPOSE:

To investigate interobserver variation in target volume delineations for prostate cancer salvage radiotherapy using planning computed tomography (CT) versus combined planning CT and magnetic resonance imaging (MRI).

MATERIALS AND METHODS:

Ten radiation oncologists independently delineated a target volume on the planning CT scans of five cases with different pathological status after radical prostatectomy. Two weeks later, this was repeated with the addition of planning MRI. The volumes obtained with CT only and combined CT and MRI were compared, and the effect of the addition of planning MRI on interobserver variability was assessed.

RESULTS:

There were large differences in clinical target volume (CTV) delineated by each observer, regardless of the addition of planning MRI (9.44-139.27 cm3 in CT only and 7.77-122.83 cm3 in CT plus MRI) and no significant differences in the mean and standard deviation of CTV. However, there were decreases in mean volume and standard deviation as a result of using the planning MRI.

CONCLUSION:

This study showed substantial interobserver variation in target volume delineation for salvage radiotherapy. The combination of planning MRI with CT tended to decrease the target volume and the variation.
Keimyung Author(s)(Kor)
김진희
Publisher
School of Medicine (의과대학)
Citation
Eonju Lee et al. (2018). Inter-observer variation in target volume for salvage radiotherapy in recurrent prostate cancer patients after radical prostatectomy using CT versus combined CT and MRI: a multicenter study (KROG 13-11). Radiation Oncology Journal, 36(1), 11–16. doi: 10.3857/roj.2017.00080
Type
Article
ISSN
2234-1900
DOI
10.3857/roj.2017.00080
URI
https://kumel.medlib.dsmc.or.kr/handle/2015.oak/41316
Appears in Collections:
1. School of Medicine (의과대학) > Dept. of Radiation Oncology (방사선종양학)
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