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- W2006664211 abstract "Abstract Purpose To introduce, implement, and assess an iterative modification to the active deformational image segmentation method as applied to cervical cancer tumors. Materials and Methods A comparison by Jaccard similarity (J S ) between this active deformational method and manual segmentation was performed on tumors of various sizes across preradiation, 3 weeks postradiation, and 6 weeks postradiation using a General Linear Mixed Model across 121 studies from 52 patients with Stage IIB‐IV cervical cancers. Results The deformable segmentation method produced promising levels of agreement including J S factors of 0.71 ± 0.11 in the preradiation studies. The analysis illustrated a rate of improvement in J S with increasing tumor volume that differed between the preradiation and 6 weeks postradiation stage ( P = 0.0474). In the large preradiated tumors each additional cm 3 of volume was associated with an increase or improvement in J S of 0.0008 (95% confidence interval [CI]: 0.0003, 0.0014). In the smaller postradiation tumors, each additional cm 3 of volume was associated with a more robust improvement in J S of 0.0046 (95% CI: 0.0009, 0.0082). Conclusion Agreement was strongly affected by tumor volume, and its performance was most impacted across volume in the later stages of radiation therapy. The deformation‐based segmentation method appears to demonstrate utility for delineating cervical cancer tumors, particularly in the earliest stages of radiation treatment, where agreement is greatest. J. Magn. Reson. Imaging 2008;28:1188–1194. © 2008 Wiley‐Liss, Inc." @default.
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- W2006664211 date "2008-10-28" @default.
- W2006664211 modified "2023-10-18" @default.
- W2006664211 title "Iterative active deformational methodology for tumor delineation: Evaluation across radiation treatment stage and volume" @default.
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- W2006664211 doi "https://doi.org/10.1002/jmri.21500" @default.
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