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JACIII Vol.13 No.3 pp. 289-296
doi: 10.20965/jaciii.2009.p0289
(2009)

Paper:

A Genetic-Algorithm-Based Temporal Subtraction for Chest Radiographs

Takeshi Inaba*, Lifeng He*, Kenji Suzuki**, Kazuhito Murakami*,
and Yuyan Chao***

*Graduate School of Information Science and Technology Aichi Prefectural University, Nagakute-cho, Aichi 480-1198, Japan

**Department of Radiology, Division of Biological Sciences, The University of Chicago, 5841 South Maryland Avenue, Chicago, IL 60637, USA

***Graduate School of Environmental Management, Nagoya Sangyo University, Owariasahi-city, Aichi 488-8711, Japan

Received:
November 25, 2008
Accepted:
February 25, 2009
Published:
May 20, 2009
Keywords:
temporal-subtraction image, computer aided diagnosis (CAD), genetic algorithm (GA), medical imaging, image registration
Abstract

To assess pathological chest change, radiologists compare the same patient’s chest radiographs taken at different times. Supporting radiologists’ diagnostics, temporal-subtraction images constructed from the previous and current radiographs have enhanced the visualization of pathological change. This paper presents a genetic-algorithm-based temporal subtraction for chest radiographs. First, we extract ribs from previous and current images and use them for global matching of the two images. Then, we divide the lung area in the current image into many subareas. For individual subarea, we use the genetic algorithm for local matching to find its corresponding area in the previous image efficiently. Results demonstrated that pathological change were accurately enhanced in temporal-subtraction images without major misregistration artifacts, accurately visualizing of pathological change and proving useful in improving radiologists, diagnostic performance.

Cite this article as:
Takeshi Inaba, Lifeng He, Kenji Suzuki, Kazuhito Murakami, and
and Yuyan Chao, “A Genetic-Algorithm-Based Temporal Subtraction for Chest Radiographs,” J. Adv. Comput. Intell. Intell. Inform., Vol.13, No.3, pp. 289-296, 2009.
Data files:
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Last updated on Feb. 25, 2021