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- Akira Iwasaki, Yoshie Kodera, +5 authors Yoshinao Abe
- Igaku butsuri : Nihon Igaku Butsuri Gakkai…
- 2005

Graphic noise properties are usually evaluated using the Wiener spectrum. However, this approach is not appropriate for periodic noise for two reasons. One is that it takes infinite values at the spatial frequencies of periodic noise. The other is that when adopting a numerical integration, it allows unstable values at each spatial frequency, depending on… (More)

- Akira Iwasaki, Yoshie Kodera, +5 authors Yoshinao Abe
- Applied radiation and isotopes : including data…
- 2006

Radiographic noise properties have been evaluated using the Wiener spectrum. However, this approach is not appropriate for periodic noise for two reasons. One is that it takes infinite values at the spatial frequencies of periodic noise. The other is that when adopting a numerical integration, it allows unstable values at each spatial frequency, depending… (More)

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