Segmentation of humeral head from axial proton density weighted shoulder MR images

Aysun Sezer; Hasan Basri Sezer; Songul Albayrak

doi:10.1117/12.2073494

28 January 2015 Segmentation of humeral head from axial proton density weighted shoulder MR images

Aysun Sezer, Hasan Basri Sezer, Songul Albayrak

Proceedings Volume 9287, 10th International Symposium on Medical Information Processing and Analysis; 928715 (2015) https://doi.org/10.1117/12.2073494
Event: Tenth International Symposium on Medical Information Processing and Analysis, 2014, Cartagena de Indias, Colombia

Abstract

The purpose of this study is to determine the effectiveness of segmentation of axial MR proton density (PD) images of bony humeral head. PD sequence images which are included in standard shoulder MRI protocol are used instead of T1 MR images. Bony structures were reported to be successfully segmented in the literature from T1 MR images. T1 MR images give more sharp determination of bone and soft tissue border but cannot address the pathological process which takes place in the bone. In the clinical settings PD images of shoulder are used to investigate soft tissue alterations which can cause shoulder instability and are better in demonstrating edema and the pathology but have a higher noise ratio than other modalities. Moreover the alteration of humeral head intensity in patients and soft tissues in contact with the humeral head which have the very similar intensities with bone makes the humeral head segmentation a challenging problem in PD images. However segmentation of the bony humeral head is required initially to facilitate the segmentation of the soft tissues of shoulder. In this study shoulder MRI of 33 randomly selected patients were included. Speckle reducing anisotropic diffusion (SRAD) method was used to decrease noise and then Active Contour Without Edge (ACWE) and Signed Pressure Force (SPF) models were applied on our data set. Success of these methods is determined by comparing our results with manually segmented images by an expert. Applications of these methods on PD images provide highly successful results for segmentation of bony humeral head. This is the first study to determine bone contours in PD images in literature.

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Aysun Sezer, Hasan Basri Sezer, and Songul Albayrak "Segmentation of humeral head from axial proton density weighted shoulder MR images", Proc. SPIE 9287, 10th International Symposium on Medical Information Processing and Analysis, 928715 (28 January 2015); https://doi.org/10.1117/12.2073494

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KEYWORDS

Image segmentation

Magnetic resonance imaging

Head

Bone

Tissues

Hough transforms

Computed tomography

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