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Proceedings Paper

Computer-aided diagnosis of breast color elastography
Author(s): Ruey-Feng Chang; Wei-Chih Shen; Min-Chun Yang; Woo Kyung Moon; Etsuo Takada; Yu-Chun Ho; Michiko Nakajima; Masayuki Kobayashi
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Paper Abstract

Ultrasound has been an important imaging technique for detecting breast tumors. As opposed to the conventional B-mode image, the ultrasound elastography is a new technique for imaging the elasticity and applied to detect the stiffness of tissues. The red region of color elastography indicates the soft tissue and the blue one indicates the hard tissue, and the harder tissue usually is classified to malignancy. In this paper, we proposed a CAD system on elastography to measure whether this system is effective and accurate to classify the tumor into benign and malignant. According to the features of elasticity, the color elastography was transferred to HSV color space and extracted meaningful features from hue images. Then the neural network was utilized in multiple features to distinguish tumors. In this experiment, there are 180 pathology-proven cases including 113 benign and 67 malignant cases used to examine the classification. The results of the proposed system showed an accuracy of 83.89%, a sensitivity of 85.07% and a specificity of 83.19%. Compared with the physician's diagnosis, an accuracy of 78.33%, a sensitivity of 53.73% and a specificity of 92.92%, the proposed CAD system had better performance. Moreover, the agreement of the proposed CAD system and the physician's diagnosis was calculated by kappa statistics, the kappa 0.54 indicated there is a fair agreement of observers.

Paper Details

Date Published: 17 March 2008
PDF: 9 pages
Proc. SPIE 6915, Medical Imaging 2008: Computer-Aided Diagnosis, 69150I (17 March 2008); doi: 10.1117/12.769617
Show Author Affiliations
Ruey-Feng Chang, National Taiwan Univ. (Taiwan)
Wei-Chih Shen, Asia Univ. (Taiwan)
Min-Chun Yang, National Taiwan Univ. (Taiwan)
Woo Kyung Moon, College of Medicine, Seoul National Univ. Hospital (South Korea)
Etsuo Takada, Dokkyo Medical Univ. (Japan)
Yu-Chun Ho, National Chung Cheng Univ. (Taiwan)
Michiko Nakajima, Saitama Medical Univ. (Japan)
Masayuki Kobayashi, Saitama Medical Univ. (Japan)


Published in SPIE Proceedings Vol. 6915:
Medical Imaging 2008: Computer-Aided Diagnosis
Maryellen L. Giger; Nico Karssemeijer, Editor(s)

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