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Application of a variable filter for presampled modulation transfer function analysis with the edge method
http://hdl.handle.net/2297/43456
http://hdl.handle.net/2297/43456d1fe4341-7813-4674-9358-a169d5db3209
| 名前 / ファイル | ライセンス | アクション |
|---|---|---|
ME-PR-HIGASHIDE-R-320.pdf (497.3 kB)
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| Item type | 学術雑誌論文 / Journal Article(1) | |||||
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| 公開日 | 2017-10-03 | |||||
| タイトル | ||||||
| タイトル | Application of a variable filter for presampled modulation transfer function analysis with the edge method | |||||
| 言語 | ||||||
| 言語 | eng | |||||
| 資源タイプ | ||||||
| 資源タイプ識別子 | http://purl.org/coar/resource_type/c_6501 | |||||
| 資源タイプ | journal article | |||||
| 著者 |
Higashide, Ryo
× Higashide, Ryo× Ichikawa, Katsuhiro× Kunitomo, Hiroshi× Ohashi, Kazuya |
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| 書誌情報 |
Radiological Physics and Technology 巻 8, 号 2, p. 320-330, 発行日 2015-07-23 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 1865-0333 | |||||
| NCID | ||||||
| 収録物識別子タイプ | NCID | |||||
| 収録物識別子 | AA12236881 | |||||
| DOI | ||||||
| 関連タイプ | isVersionOf | |||||
| 識別子タイプ | DOI | |||||
| 関連識別子 | 10.1007/s12194-015-0325-2 | |||||
| 出版者 | ||||||
| 出版者 | 日本放射線技術学会 and 日本医学物理学会Japanese Society of Radiological Technology and Japan Society of Medical Physics / Springer-Verlag Tokyo | |||||
| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | We devised a new noise filtering method to reduce the noise in the line spread function (LSF) for presampled modulation transfer function (MTF) analysis with the edge method. A filter was designed to reduce noise effectively using a position-dependent filter controlled by the boundary frequency b for low-pass filtering, which is calculated by 1/2d (d: distance from the LSF center). In this filtering process, strong filters with very low b can be applied to regions distant from the LSF center, and the region near the LSF center can be maintained simultaneously by a correspondingly high b. Presampled MTF accuracies derived by use of the proposed method and an edge spread function (ESF)-fitting method were compared by use of simulated ESFs with and without noise, resembling a computed radiography (CR) and an indirect-type flat panel detector (FPD), respectively. In addition, the edge images of clinical CR, indirect-type FPD, and direct-type FPD systems were examined. For a simulated ESF without noise, the calculated MTFs of the variable filtering method agreed precisely with the true MTFs. The excellent noise-reduction ability of the variable filter was demonstrated for all simulated noisy ESFs and those of three clinical systems. Although the ESF-fitting method provided excellent noise reduction only for the CR-like simulated ESF with noise, its noise elimination performance could not be demonstrated due to the lesser robustness of the fitting. © 2015, Japanese Society of Radiological Technology and Japan Society of Medical Physics. | |||||
| 内容記述 | ||||||
| 内容記述タイプ | Other | |||||
| 内容記述 | 発行後1年より全文公開 | |||||
| 権利 | ||||||
| 権利情報 | The final publication is available at www.springerlink.com/article/10.1007%2Fs12194-015-0325-2 | |||||
| 著者版フラグ | ||||||
| 出版タイプ | AM | |||||
| 出版タイプResource | http://purl.org/coar/version/c_ab4af688f83e57aa | |||||
