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http://dx.doi.org/10.14400/JDC.2014.12.11.407

Quantitative Analysis of Spatial Resolution for the Influence of the Focus Size and Digital Image Post-Processing on the Computed Radiography  

Seoung, Youl-Hun (Dept. of Radiological Science, Cheongju University)
Publication Information
Journal of Digital Convergence / v.12, no.11, 2014 , pp. 407-414 More about this Journal
Abstract
The aim of the present study was to carry out quantitative analysis of spatial resolution for the influence of the focus size and digital image post-processing on the Computed Radiography (CR). The modulation transfer functions of an edge measuring method (MTF) was used for the evaluation of the spatial resolution. The focus size of X-ray tube was used the small focus (0.6 mm) and the large focus (1.2 mm). We evaluated the 50% and 10% of MTF for the enhancement of edge and contrast by using multi-scale image contrast amplification (MUSICA) in digital image post-processing. As a results, the edge enhancement than the contrast enhancement were significantly higher the spatial resolution of MTF 50% in all focus. Also the spatial resolution of the obtained images in a large focus were improved by digital image processing. In conclusion, the results of this study should serve as a basic data for obtain the high resolution clinical images, such as skeletal and chest images on the CR.
Keywords
Computed Radiography; Spatial Resolution; Edge Enhancement; Contrast Enhancement; Focus Size;
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