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Proceedings Paper

Recognition method of lung nodules using blood vessel extraction techniques and 3D object models
Author(s): Gentaro Fukano; Hotaka Takizawa; Kanae Shigemoto; Shinji Yamamoto; Tohru Matsumoto; Yukio Tateno; Takeshi Iinuma
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Paper Abstract

In this paper, we propose a method for reducing false positives in X-ray CT images using ridge shadow extraction techniques and 3D geometric object models. Suspicious shadows are detected by our variable N-quoit (VNQ) filter, which is a type of mathematical morphology filter. This filter can detect lung cancer shadows with the sensitivity over 95[%], but it also detects many false positives which are mainly related to blood vessel shadows. We have developed two algorithms to distinguish lung nodule shadows from blood vessel shadows. In the first algorithm, the ridge shadows, which come from blood vessels, are emphasized by our Tophat by Partial Reconstruction filter which is also a type of mathematical morphology filter. And then, the region of the ridge shadow is extracted using binary distance transformation. In the second algorithm, we propose a recognition method of nodules using 3D geometric lung nodule and blood vessel models. The anatomical knowledge about the 3D structures of nodules and blood vessels can be reflected in recognition process. By applying our new method to actual CT images (37 patient images), a good result has been acquired.

Paper Details

Date Published: 15 May 2003
PDF: 9 pages
Proc. SPIE 5032, Medical Imaging 2003: Image Processing, (15 May 2003); doi: 10.1117/12.480665
Show Author Affiliations
Gentaro Fukano, Toyohashi Univ. of Technology (Japan)
Yokogawa Electric Corp. (Japan)
Hotaka Takizawa, Toyohashi Univ. of Technology (Japan)
Kanae Shigemoto, Toyohashi Univ. of Technology (Japan)
Shinji Yamamoto, Toyohashi Univ. of Technology (Japan)
Tohru Matsumoto, National Institute of Radiological Sciences (Japan)
Yukio Tateno, National Institute of Radiological Sciences (Japan)
Takeshi Iinuma, National Institute of Radiological Sciences (Japan)

Published in SPIE Proceedings Vol. 5032:
Medical Imaging 2003: Image Processing
Milan Sonka; J. Michael Fitzpatrick, Editor(s)

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