Ian Yulianti, - Contrast-to-noise ratio and histogram analysis of modified digital radiography image of pet. Journal of Physics: Conference Series. (Submitted)

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Abstract

This work presents the quality analysis of the digital image of pet to obtain optimum exposure factors for pet radiography diagnosis using conventional-modified digital radiography. The digital radiography that used was conventional radiography which was modified by using the digital camera, intensifying screen and image processing software so that it works as digital radiography. The object, a bone-broken cat, was exposed to X-ray radiation from the digital radiography with various exposure factors which are voltage, current and exposure time. The image quality analysis was done by performing Contrast-to-Noise Ratio (CNR) analysis and histogram analysis using image processing toolbox provided by MATLAB. The results show that exposure factors of the voltage of 60 kV, the current of 16 mA and exposure time of 0.20 s provided CNR highest value which is 57.249. Histogram analysis shows that the image with the above-mentioned exposure factors has almost uniform grey intensity distribution.

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