Study on Construction of a Medical X-Ray Direct Digital Radiography System and Hybrid Preprocessing Methods

We construct a medical X-ray direct digital radiography (DDR) system based on a CCD (charge-coupled devices) camera. For the original images captured from X-ray exposure, computer first executes image flat-field correction and image gamma correction, and then carries out image contrast enhancement....

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Bibliographic Details
Published in:Computational and mathematical methods in medicine 2014-01, Vol.2014 (2014), p.1-7
Main Authors: Ren, Yong, Wu, Sheng, Wang, Mijian, Cen, Zhongjie
Format: Article
Language:English
Subjects:
Algorithms
Computer Systems
Contrast Media
Equipment Design
Humans
Image Processing, Computer-Assisted - methods
Optics and Photonics
Phantoms, Imaging
Radiographic Image Enhancement - methods
Radiographic Image Interpretation, Computer-Assisted - methods
Reproducibility of Results
Software
X-Rays
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Summary:We construct a medical X-ray direct digital radiography (DDR) system based on a CCD (charge-coupled devices) camera. For the original images captured from X-ray exposure, computer first executes image flat-field correction and image gamma correction, and then carries out image contrast enhancement. A hybrid image contrast enhancement algorithm which is based on sharp frequency localization-contourlet transform (SFL-CT) and contrast limited adaptive histogram equalization (CLAHE), is proposed and verified by the clinical DDR images. Experimental results show that, for the medical X-ray DDR images, the proposed comprehensive preprocessing algorithm can not only greatly enhance the contrast and detail information, but also improve the resolution capability of DDR system.
ISSN:1748-670X
1748-6718
DOI:10.1155/2014/495729