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Fig. 4 | Radiation Oncology

Fig. 4

From: Registering prostate external beam radiotherapy with a boost from high-dose-rate brachytherapy: a comparative evaluation of deformable registration algorithms

Fig. 4

Ranking of registration methods according to image-similarity results for registrations applied to 64 patients. The medians of the percentage changes in the mean square error (MSE) and mutual information (MI) were calculated via 100*after/before-100. Increasing ranking indicates less image similarity and more image dissimilarity. Some registrations share the same ranking due to insignificant (p >0.05) paired differences for metric values (alternatively, see Additional file 1: Figures A6 and A7 for metric values and the results of the statistical significance tests). The MSE and MI metrics were calculated for two regions of interest, which were the entirety of the images and the bounding box enclosing both the HDR CT and rigidly-registered EBRT CT rectum structures. See the abbreviations list or the non-rigid registration section of the methods section for information about D, HS, V1 and V2

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Radiation Oncology

ISSN: 1748-717X

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