Automatic spectral imaging protocol selection combined with iterative reconstruction can enhance image quality and decrease radiation and contrast dosage in abdominal CT angiography

  • Bu-Lang Gao
  • Xiao-Ping Yin
  • Cai-Ying Li
  • Zi-Wei Zuo
  • Ying-Jin Xu
  • Jia-Ning Wang
  • Huai-Jun Liu
  • Guang-Lu Liang

Abstract

PurposeTo investigate the effect of automatic spectral imaging protocol selection (ASIS) and adaptive statistical iterative reconstruction (IR) technology in reducing radiation and contrast dosage.


Methods: Sixty-four patients were randomly divided into two groups for abdominal computed tomography (CT): the experiment group with ASIS plus 30%-50% IR and the control with 120kVp voltage.


Results: The CT dose index volume decreased by 23.68% and 23.57% and the dose length product dropped by 25.59% and 18.45% in the arterial and portal venous phases, respectively, in the experiment than control group. The contrast dose was reduced by 16.86% in the experiment group. In the 70keV+30% IR group, the noise of liver, pancreas and sacrospinal muscle were significantly (P<0.05) lower in both phases than the control group, and the score was higher than in the control group (P<0.05). In the 55keV+ 50% IR group, the arterial contrast-to-noise ratio and scores were significantly (P<0.05) higher in the arterial phase but the sacrospinal muscle noise was significantly (P<0.05) lower than in the control group.


Conclusion: The ASIS technique plus 30%-50% IR can enhance image quality of the abdominal structures while decreasing the radiation and contrast dosage compared with the conventional scan mode.

Published
2017-10-07
How to Cite
GAO, Bu-Lang et al. Automatic spectral imaging protocol selection combined with iterative reconstruction can enhance image quality and decrease radiation and contrast dosage in abdominal CT angiography. Current Science, [S.l.], v. 113, n. Issue 6, oct. 2017. ISSN 0011-3891. Available at: <http://currentscience.org/index.php/CS/article/view/133>. Date accessed: 15 dec. 2017.