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Proceedings Paper

CAD system for lung cancer based on low-dose single-slice CT image
Author(s): Mitsuru Kubo; Kazuhori Kubota; Nobuhiro Yamada; Yoshiki Kawata; Noboru Niki; Kenji Eguchi; Hironobu Ohmatsu; Ryutaro Kakinuma; Masahiro Kaneko; Masahiko Kusumoto; Kiyoshi Mori; Hiroyuki Nishiyama; Noriyuki Moriyama
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Paper Abstract

We have been developed a computer-aided diagnosis (CAD) system for the lung cancer detection of early stage from low dose single-slice computed tomography (CT) with 10 mm beam width on chest screening. The objective of this study is to solve three problems of the conventional CAD system; (1) lesion which overlaps blood vessel, (2) lesion in contact with blood vessel and (3) lesion near upper mediastinum. This paper presents a new method to solve problem-1 and problem-2. The blood vessels, which overlap lesions and others in contact with lesion, are eliminated by detecting region of interest (ROI) with accuracy. Detection method of ROIs consists of 3 processes; firstly, streak shadows elimination using linear feature detector filter, secondly, estimation of pulmonary background bias using the intensity histogram and the opening method, and finally, ROI's border detection using laplacian filter. We evaluated the new system by apply it to 155 shadows which need confirmation diagnosis. These cases were selected from clinical test from July 1997 to December 2000 in retrospective study. True positive cases of this algorithm achieved sensitivity 91.0 %. The average of false positive cases was 0.53 per slice.

Paper Details

Date Published: 9 May 2002
PDF: 8 pages
Proc. SPIE 4684, Medical Imaging 2002: Image Processing, (9 May 2002); doi: 10.1117/12.467086
Show Author Affiliations
Mitsuru Kubo, Univ. of Tokushima (Japan)
Kazuhori Kubota, Univ. of Tokushima (Japan)
Nobuhiro Yamada, Univ. of Tokushima (Japan)
Yoshiki Kawata, Univ. of Tokushima (Japan)
Noboru Niki, Univ. of Tokushima (Japan)
Kenji Eguchi, Tokai Univ. (Japan)
Hironobu Ohmatsu, National Cancer Ctr. Hospital East (Japan)
Ryutaro Kakinuma, National Cancer Ctr. Hospital East (Japan)
Masahiro Kaneko, National Cancer Ctr. Hospital (Japan)
Masahiko Kusumoto, National Cancer Ctr. Hospital (Japan)
Kiyoshi Mori, National Tochigi Cancer Ctr. Hospital (Japan)
Hiroyuki Nishiyama, Social Health Insurance Medical Ctr. (Japan)
Noriyuki Moriyama, National Cancer Ctr. Hospital (Japan)

Published in SPIE Proceedings Vol. 4684:
Medical Imaging 2002: Image Processing
Milan Sonka; J. Michael Fitzpatrick, Editor(s)

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