Active shape model with inter-profile modeling paradigm for cardiac right ventricle segmentation

Authors:
Mohammed S. ElBaz;Ahmed S. Fahmy
Affiliations:
Medical Imaging and Image processing Lab., Center for Informatics Science, Nile University, Cairo, Egypt, Division of Image Processing, Department of Radiology, Leiden University Medical Center, L ...;Medical Imaging and Image processing Lab., Center for Informatics Science, Nile University, Cairo, Egypt, Systems and Biomedical Engineering Department, Cairo University, Cairo, Egypt
Venue:
MICCAI'12 Proceedings of the 15th international conference on Medical Image Computing and Computer-Assisted Intervention - Volume Part I
Year:
2012

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Abstract

In this work, a novel active shape model (ASM) paradigm is proposed to segment the right ventricle (RV) in cardiac magnetic resonance image sequences. The proposed paradigm includes modifications to two fundamental steps in the ASM algorithm. The first modification includes employing the 2D-Principal Component Analysis (PCA) to capture the inter-profile relations among shape's neighboring landmarks and then model the inter-profile variations between the training set. The second modification is based on using a multi-stage searching algorithm to find the best profile match based on the best maintained profile's relations and thus the best shape fitting in an iterative manner. The developed methods are validated using a database of short axis cine bright blood MRI images for 30 subjects with total of 90 images. Our results show that the segmentation error can be reduced by about 0.4 mm and contour overlap increased by about 4% compared to the classical ASM technique with paired Student's t-test indicates statistical significance to a high degree for our results. Furthermore, comparison with literature shows that the proposed method decreases the RV segmentation error significantly.