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Zonal segmentation of prostate using multispectral magnetic resonance images

Research output: Contribution to journalArticleScientificpeer-review

Details

Original languageEnglish
Pages (from-to)6093-6105
Number of pages13
JournalMedical Physics
Volume38
Issue number11
DOIs
Publication statusPublished - Nov 2011
Publication typeA1 Journal article-refereed

Abstract

Purpose: To investigate the performance of a new method of automatic segmentation of prostatic multispectral magnetic resonance images into two zones: the peripheral zone and the central gland. Methods: The proposed method is based on a modified version of the evidential C-means clustering algorithm. The evidential C-means optimization process was modified to introduce spatial neighborhood information. A priori knowledge of the prostate's zonal morphology was modeled as a geometric criterion and used as an additional data source to enhance the differentiation of the two zones. Results: Thirty-one clinical magnetic resonance imaging series were used to validate the method, and interobserver variability was taken into account in assessing its accuracy. The mean Dice Similarity Coefficient was 89 for the central gland and 80 for the peripheral zone, as validated by a consensus from expert radiologist segmentation. Conclusions: The method was statistically insensitive to variations in patient age, prostate volume and the presence of tumors, which increases its feasibility in a clinical context.

Keywords

  • central gland, multispectral MRI, peripheral zone, prostate, Segmentation