TY - JOUR
T1 - Feasibility of low-radiation-dose CT for abdominal examinations with hybrid iterative reconstruction algorithm
T2 - Low-contrast phantom study
AU - Kondo, Masatoshi
AU - Hatakenaka, Masamitsu
AU - Higuchi, Ko
AU - Fujioka, Taisuke
AU - Shirasaka, Takashi
AU - Nakamura, Yasuhiko
AU - Nakamura, Katsumasa
AU - Yoshiura, Takashi
AU - Honda, Hiroshi
N1 - Funding Information:
Acknowledgments We appreciate the technical support we received from the Research Support Center, Graduate School of Medical Sciences, Kyushu University, and Kouichiro Tawara and Hidekazu Ota from Philips Healthcare for technical assistance with the enormous HIR reconstruction. This work was partly supported by Philips Healthcare. Technical support for this study was provided by Philips Healthcare, and two of the coauthors, Ko Higuchi and Taisuke Fujioka, are employees of Philips Electronics Japan Medical Systems.
PY - 2013/7
Y1 - 2013/7
N2 - Our purpose in this study was to evaluate the image quality of low-radiation-dose CT using hybrid iterative reconstruction (HIR), and to compare the results with those of filtered back projection (FBP) at routine doses. We measured the mean values and standard deviation of the CT numbers within and outside a 15-mm low-contrast object cylinder at 1.0 % contrast level. The noise reduction levels of the HIR were 1 (weak) to 7 (strong). Visual inspection of the low-contrast detectability was done by six radiologic technologists. The low-contrast detectability of the cylinder at the 1.0 % contrast level with HIR at all mAs levels was equal to that obtained with FBP, and thus the use of HIR did not result in any improvement of low-contrast detectability.
AB - Our purpose in this study was to evaluate the image quality of low-radiation-dose CT using hybrid iterative reconstruction (HIR), and to compare the results with those of filtered back projection (FBP) at routine doses. We measured the mean values and standard deviation of the CT numbers within and outside a 15-mm low-contrast object cylinder at 1.0 % contrast level. The noise reduction levels of the HIR were 1 (weak) to 7 (strong). Visual inspection of the low-contrast detectability was done by six radiologic technologists. The low-contrast detectability of the cylinder at the 1.0 % contrast level with HIR at all mAs levels was equal to that obtained with FBP, and thus the use of HIR did not result in any improvement of low-contrast detectability.
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U2 - 10.1007/s12194-012-0197-7
DO - 10.1007/s12194-012-0197-7
M3 - Article
C2 - 23299614
AN - SCOPUS:84880313508
SN - 1865-0333
VL - 6
SP - 287
EP - 292
JO - Radiological physics and technology
JF - Radiological physics and technology
IS - 2
ER -