Comput Methods Programs Biomed - A survey of prostate segmentation methodologies in ultrasound, magnetic resonance and computed tomography images.

Tópicos

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Resumo

Prostate segmentation is a challenging task, and the challenges significantly differ from one imaging modality to another. Low contrast, speckle, micro-calcifications and imaging artifacts like shadow poses serious challenges to accurate prostate segmentation in transrectal ultrasound (TRUS) images. However in magnetic resonance (MR) images, superior soft tissue contrast highlights large variability in shape, size and texture information inside the prostate. In contrast poor soft tissue contrast between prostate and surrounding tissues in computed tomography (CT) images pose a challenge in accurate prostate segmentation. This article reviews the methods developed for prostate gland segmentation TRUS, MR and CT images, the three primary imaging modalities that aids prostate cancer diagnosis and treatment. The objective of this work is to study the key similarities and differences among the different methods, highlighting their strengths and weaknesses in order to assist in the choice of an appropriate segmentation methodology. We define a new taxonomy for prostate segmentation strategies that allows first to group the algorithms and then to point out the main advantages and drawbacks of each strategy. We provide a comprehensive description of the existing methods in all TRUS, MR and CT modalities, highlighting their key-points and features. Finally, a discussion on choosing the most appropriate segmentation strategy for a given imaging modality is provided. A quantitative comparison of the results as reported in literature is also presented.

Resumo Limpo

prostat segment challeng task challeng signific differ one imag modal anoth low contrast speckl microcalcif imag artifact like shadow pose serious challeng accur prostat segment transrect ultrasound trus imag howev magnet reson mr imag superior soft tissu contrast highlight larg variabl shape size textur inform insid prostat contrast poor soft tissu contrast prostat surround tissu comput tomographi ct imag pose challeng accur prostat segment articl review method develop prostat gland segment trus mr ct imag three primari imag modal aid prostat cancer diagnosi treatment object work studi key similar differ among differ method highlight strength weak order assist choic appropri segment methodolog defin new taxonomi prostat segment strategi allow first group algorithm point main advantag drawback strategi provid comprehens descript exist method trus mr ct modal highlight keypoint featur final discuss choos appropri segment strategi given imag modal provid quantit comparison result report literatur also present

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