Evaluation of cost functions for gray value matching of 2D images in radiotherapy
N Dekker, LS Ploeger, M van Herk - … , October 14–17, 2001 Proceedings 4, 2001 - Springer
N Dekker, LS Ploeger, M van Herk
Medical Image Computing and Computer-Assisted Intervention–MICCAI 2001: 4th …, 2001•SpringerIn this paper, cost functions are tested for 2D registration of portal and reference images for
treatment verification in radiotherapy. Tests were performed with and without pre-processing
for 96 image pairs of various treatment sites. The best results were obtained when the
images were preprocessed by unsharp masking and histogram equalization. This led to a
success rate of about 88% and a difference with clinical registration of 1.2 mm SD and 1
degree SD for most of the tested cost functions. The number of local minima with mutual …
treatment verification in radiotherapy. Tests were performed with and without pre-processing
for 96 image pairs of various treatment sites. The best results were obtained when the
images were preprocessed by unsharp masking and histogram equalization. This led to a
success rate of about 88% and a difference with clinical registration of 1.2 mm SD and 1
degree SD for most of the tested cost functions. The number of local minima with mutual …
Abstract
In this paper, cost functions are tested for 2D registration of portal and reference images for treatment verification in radiotherapy. Tests were performed with and without pre-processing for 96 image pairs of various treatment sites. The best results were obtained when the images were preprocessed by unsharp masking and histogram equalization. This led to a success rate of about 88% and a difference with clinical registration of 1.2 mm SD and 1 degree SD for most of the tested cost functions. The number of local minima with mutual information is much larger than with the other tested cost functions.
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