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Noise properties for three weighted Feldkamp algorithms using a 256-detecotor row CT-scanner: Case study for hepatic volumetric cine imaging
https://repo.qst.go.jp/records/44826
https://repo.qst.go.jp/records/448265a5da98a-9620-4738-ba6b-13cab4bd6ab6
| Item type | 学術雑誌論文 / Journal Article(1) | |||||
|---|---|---|---|---|---|---|
| 公開日 | 2007-04-06 | |||||
| タイトル | ||||||
| タイトル | Noise properties for three weighted Feldkamp algorithms using a 256-detecotor row CT-scanner: Case study for hepatic volumetric cine imaging | |||||
| 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 | |||||
| アクセス権 | ||||||
| アクセス権 | metadata only access | |||||
| アクセス権URI | http://purl.org/coar/access_right/c_14cb | |||||
| 著者 |
Mori, Shinichiro
× Mori, Shinichiro× Endo, Masahiro× Obata, Takayuki× Kishimoto, Riwa× Katou, Hirotoshi× Kandatsu, Susumu× Tsujii, Hirohiko× Tanada, Shuji× 森 慎一郎× 遠藤 真広× 小畠 隆行× 岸本 理和× 加藤 博敏× 神立 進× 辻井 博彦× 棚田 修二 |
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| 抄録 | ||||||
| 内容記述タイプ | Abstract | |||||
| 内容記述 | In cone-beam geometry, image quality may be degraded or artifacts may occur if the cone angle is substantially wide. This is because a cone-beam scan along a circular orbit does not collect the complete set of data required to make an exact reconstruction of all volumetric data. To increase temporal resolution and thus image quality in cone-beam geometry, Silver proposed the new half-scan algorithm (NHS-FDK), which extends Parker's weighting function (HS-FDK) by utilizing a larger range up to 2pi. Here, we evaluated these algorithms for hepatic contrast-enhanced CT in cine scan mode using a 256-detector row CT. The full-scan (FS-FDK) images show uniform distribution of the image noise and CT-number uniformity. Image noise and CT-number uniformity with HS-FDK and NHS-FDK images follow the initial projection angle. HS-FDK images therefore have more changeable higher intensity (brighter) and a lower intensity (darker) areas than respective FS-FDK and NHS-FDK images. We concluded that, considering the trade-off between image quality and temporal resolution, the NHS-FDK algorithm is useful in volumetric cine imaging for the abdomen. | |||||
| 書誌情報 |
European Journal of Radiology 巻 59, p. 289-294, 発行日 2006-09 |
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| ISSN | ||||||
| 収録物識別子タイプ | ISSN | |||||
| 収録物識別子 | 0720-048X | |||||
