@article{oai:repo.qst.go.jp:00044826,
 author = {Mori, Shinichiro and Endo, Masahiro and Obata, Takayuki and Kishimoto, Riwa and Katou, Hirotoshi and Kandatsu, Susumu and Tsujii, Hirohiko and Tanada, Shuji and 森 慎一郎 and 遠藤 真広 and 小畠 隆行 and 岸本 理和 and 加藤 博敏 and 神立 進 and 辻井 博彦 and 棚田 修二},
 journal = {European Journal of Radiology},
 month = {Sep},
 note = {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.},
 pages = {289--294},
 title = {Noise properties for three weighted Feldkamp algorithms using a 256-detecotor row CT-scanner: Case study for hepatic volumetric cine imaging},
 volume = {59},
 year = {2006}
}