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KMID : 1151820190130050773
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Journal of the Korean Society of Radiology
2019 Volume.13 No. 5 p.773 ~ p.778
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Application of Total Variation Algorithm in X-ray Phantom Image with Various Added Filter Thickness : GATE Simulation Study
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Park Tae-Il
Jang Su-Jong
Lee Young-Jin
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Abstract
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Images using X-rays are essential to diagnosis, but noise is inevitable in the image. To compensate for this, a total variation (TV) algorithm was presented to reduce the patient's exposure dose while increasing the quality of the images. The purpose of this study is to verify the effect on the image quality in radiographic imaging according to the thickness of the additional filtration plate through simulation, and to evaluate the usefulness of the TV algorithm. By using the Geant4 Application for Tomographic Emissions (GATE) simulation image, the actual size, shape and material of the Polymethylmethacrylate (PMMA) phantom were identical, the contrast to noise ratio (CNR) and coefficient of variation (COV) were compared. The results showed that the CNR value was the highest and the COV the lowest when applying the TV algorithm. In addition, we can acquire superior CNR and COV results with 0 mm Al in all algorithm cases.
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KEYWORD
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TV Algorithm, Added filter, GATE simulation, PMMA phantom
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