Connection method of separated luminal regions of intestine from CT volumes

Masahiro Oda; Takayuki Kitasaka; Kazuhiro Furukawa M.D.; Osamu Watanabe M.D.; Takafumi Ando M.D.; Yoshiki Hirooka M.D.; Hidemi Goto M.D.; Kensaku Mori

doi:10.1117/12.2081977

20 March 2015 Connection method of separated luminal regions of intestine from CT volumes

Masahiro Oda, Takayuki Kitasaka, Kazuhiro Furukawa M.D., Osamu Watanabe M.D., Takafumi Ando M.D., Yoshiki Hirooka M.D., Hidemi Goto M.D., Kensaku Mori

Author Affiliations +

Proceedings Volume 9414, Medical Imaging 2015: Computer-Aided Diagnosis; 94140P (2015) https://doi.org/10.1117/12.2081977
Event: SPIE Medical Imaging, 2015, Orlando, Florida, United States

Abstract

This paper proposes a connection method of separated luminal regions of the intestine for Crohn's disease diagnosis. Crohn's disease is an inflammatory disease of the digestive tract. Capsule or conventional endoscopic diagnosis is performed for Crohn's disease diagnosis. However, parts of the intestines may not be observed in the endoscopic diagnosis if intestinal stenosis occurs. Endoscopes cannot pass through the stenosed parts. CT image-based diagnosis is developed as an alternative choice of the Crohn's disease. CT image-based diagnosis enables physicians to observe the entire intestines even if stenosed parts exist. CAD systems for Crohn's disease using CT volumes are recently developed. Such CAD systems need to reconstruct separated luminal regions of the intestines to analyze intestines. We propose a connection method of separated luminal regions of the intestines segmented from CT volumes. The luminal regions of the intestines are segmented from a CT volume. The centerlines of the luminal regions are calculated by using a thinning process. We enumerate all the possible sequences of the centerline segments. In this work, we newly introduce a condition using distance between connected ends points of the centerline segments. This condition eliminates unnatural connections of the centerline segments. Also, this condition reduces processing time. After generating a sequence list of the centerline segments, the correct sequence is obtained by using an evaluation function. We connect the luminal regions based on the correct sequence. Our experiments using four CT volumes showed that our method connected 6.5 out of 8.0 centerline segments per case. Processing times of the proposed method were reduced from the previous method.

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Masahiro Oda, Takayuki Kitasaka, Kazuhiro Furukawa M.D., Osamu Watanabe M.D., Takafumi Ando M.D., Yoshiki Hirooka M.D., Hidemi Goto M.D., and Kensaku Mori "Connection method of separated luminal regions of intestine from CT volumes", Proc. SPIE 9414, Medical Imaging 2015: Computer-Aided Diagnosis, 94140P (20 March 2015); https://doi.org/10.1117/12.2081977

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KEYWORDS

Intestine

Image segmentation

Computed tomography

Magnetic resonance imaging

CAD systems

Endoscopy

Rectum

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