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Two non-parametric methods for derivation of constraints from radiotherapy dose-histogram data.
Phys. Med. Biol. 59, N101-N111 (2014)
Dose constraints based on histograms provide a convenient and widely-used method for informing and guiding radiotherapy treatment planning. Methods of derivation of such constraints are often poorly described. Two non-parametric methods for derivation of constraints are described and investigated in the context of determination of dose-specific cut-points-values of the free parameter (e.g., percentage volume of the irradiated organ) which best reflect resulting changes in complication incidence. A method based on receiver operating characteristic (ROC) analysis and one based on a maximally-selected standardized rank sum are described and compared using rectal toxicity data from a prostate radiotherapy trial. Multiple test corrections are applied using a free step-down resampling algorithm, which accounts for the large number of tests undertaken to search for optimal cut-points and the inherent correlation between dose-histogram points. Both methods provide consistent significant cut-point values, with the rank sum method displaying some sensitivity to the underlying data. The ROC method is simple to implement and can utilize a complication atlas, though an advantage of the rank sum method is the ability to incorporate all complication grades without the need for grade dichotomization.
Impact Factor
Scopus SNIP
Web of Science
Times Cited
Times Cited
Scopus
Cited By
Cited By
Altmetric
2.922
1.756
2
2
Anmerkungen
Besondere Publikation
Auf Hompepage verbergern
Publikationstyp
Artikel: Journalartikel
Dokumenttyp
Wissenschaftlicher Artikel
Schlagwörter
Radiotherapy ; Dose Volume Histograms ; Treatment Complications ; Toxicity ; Constraints; Late Rectal Toxicity; 03.04 Radar Trial; Prostate-cancer; Conformal Radiotherapy; Volume Histograms; Optimal Cutpoints; Statistics; Grade-2; System; Impact
Sprache
englisch
Veröffentlichungsjahr
2014
HGF-Berichtsjahr
2014
ISSN (print) / ISBN
0031-9155
e-ISSN
1361-6560
Zeitschrift
Physics in Medicine and Biology
Quellenangaben
Band: 59,
Heft: 13,
Seiten: N101-N111
Verlag
Institute of Physics Publishing (IOP)
Verlagsort
Bristol
Begutachtungsstatus
Peer reviewed
Institut(e)
Institute of Computational Biology (ICB)
POF Topic(s)
30205 - Bioengineering and Digital Health
Forschungsfeld(er)
Enabling and Novel Technologies
PSP-Element(e)
G-503800-001
WOS ID
WOS:000338424800001
Scopus ID
84902490624
Erfassungsdatum
2014-08-04