| Project/Area Number |
24791349
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| Research Category |
Grant-in-Aid for Young Scientists (B)
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| Allocation Type | Multi-year Fund |
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| Research Field |
Radiation science
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| Research Institution | Junshin Gakuen University |
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Principal Investigator |
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| Co-Investigator(Renkei-kenkyūsha) |
TOYOFUKU Fukai 九州大学, 医学系学府 保健学専攻, 教授 (10117179)
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| Project Period (FY) |
2012-04-01 – 2014-03-31
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| Project Status |
Completed (Fiscal Year 2013)
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| Budget Amount *help |
¥2,730,000 (Direct Cost: ¥2,100,000、Indirect Cost: ¥630,000)
Fiscal Year 2013: ¥1,040,000 (Direct Cost: ¥800,000、Indirect Cost: ¥240,000)
Fiscal Year 2012: ¥1,690,000 (Direct Cost: ¥1,300,000、Indirect Cost: ¥390,000)
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| Keywords | presampled MTF / edge method / slit method / digital radiography / image property / resolution / MTF / 医用画像工学 |
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| Research Abstract |
We are proposing a new simplified practical method for measuring the presampled MTF of digital radiographic systems using a virtual slit image from an edge image. The basic concept of our approach is the combination of the edge and slit methods.
The accuracy and uncertainty of the new method was investigated using simulated images (whose true MTFs are known) and a clinical indirect flat panel detector (FPD). In the simulations, the new method had a higher accuracy than the IEC method. In the clinical system, both the MTFs of the new and the IEC methods are in good agreement for frequencies up to the Nyquist frequency limit (within 0.0028). The standard deviation (SD) of the MTF using the new method was comparable with that of the IEC method.
In our method, we can calculate the LSF from a virtual slit image and obtain a precise presampled MTF much more easily than in previous methods.
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