9-2 Image enhancement of radiographs using wavelet transform

Abstract

Dynamic range of chest radiography is wide from the signal level in areas which X-ray heavily attenuate through mediastinum, to the signal level in area which X-ray pass through air filled lung. To enhance the feature on the mediastinum, we propose a method of enhancement of chest radiographs using wavelet analysis, and showed that our method can be an regionally adaptive enhancement.