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KMID : 0357520060290030133
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Journal of Radiological Science and Technology
2006 Volume.29 No. 3 p.133 ~ p.139
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Correction Method of Slit Modulation Transfer function on Digital Medical Imaging System
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Kim Jung-Min
Jeong Hea-Won
Min Jung-Whan
Im Eun-Kyung
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Abstract
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By using CR image pixel data, We examined the way how to calculate the MTF and digital characteristic curve. It can be changed to the text-file(Excel) from a pixel data which was printed with a digital x-ray equipment. In this place, We described the way how to figure out and correct the sharpness of a digital images of the MTF from FUJITA. Excel program was utilized to calculate from radiography of slit. Digital characteristic curve, Line Spread Function, Discrete Fourier Transform, Fast Fourier Transform digital specification curve, were indicated in regular sequence. A big advantage of this method, It can be understood easily and you can get results without costly program and without full knowledge of computer language. It shows many different values by using different correction methods. Therefore we need to be handy with appropriate correction method and we should try many experiments to get a precise MTF figures.
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KEYWORD
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Digital Image, Sharpness, LSF, MTF
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