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KMID : 0357520200430010015
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Journal of Radiological Science and Technology
2020 Volume.43 No. 1 p.15 ~ p.21
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Evaluation of Angle Optimization on Edge Test Device Setting in Modulation Transfer Function
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Min Jung-Whan
Jeong Hoi-Woun
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Abstract
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This study was purpose to evaluation of Modulation Transfer Function in Measurements by using the International electrotechnical commission standard(IEC 62220-1) which were edge device each angle by using edge method. In this study was Aero(Konica, Japan) image receptor which is a indirect Flat panel detector(FPD) was used. The size of matrix 1994 × 2430 (14″× 17″inch) which performed 12 bit processing and pixel pitch is 175 μm. The results of shown as MTF measurements at IEC standard. The amount of data seemed reasonable and at an MTF value of 0.1 the spatial frequencies were 2.56 cycles/mm at an angle of 2.4o. MTF value of 0.5 the spatial frequencies were 1.32 cycles/mm at an angle of 2.4o. This study were to evaluate MTF by setting each angle 2.0o∼2.8o degrees the most effective optimal edge angle and to suggest the quantitative methods of measuring by using IEC.
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KEYWORD
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Modulation transfer function, International electrotechnical commission standard, Edge method, Edge angle, Spatial frequency
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