Affiliations: Department of Electrical and Computer Engineering,
University of Iowa, Iowa City, IA 52242, USA | Department of Radiology, University of Iowa Carver
College of Medicine, Iowa City, IA 52242, USA | Department of Electrical and Computer Engineering,
Iowa State University, Ames, IA 50011, USA | Department of Radiology, Cedar Valley Medical
Specialists, 602 Ansborough Ave, Waterloo, IA 50604, USA | Controlled Cardiac CT, Iowa City, IA 52246, USA
Note: [] Corresponding author: Er-Wei Bai, Department of Electrical and
Computer Engineering, University of Iowa 4316 Seamans Center for the
Engineering Arts and Sciences Iowa City, IA 52242, USA. Tel.: +1 319 355 5949;
E-mail: er-wei-bai@uiowa.edu
Abstract: To improve imaging quality and to reduce contrast dose and radiation
exposure, an adaptive bolus chasing CT angiography was proposed so that the
bolus peak position and the imaging aperture can be synchronized. The
performance of the proposed adaptive bolus chasing CT angiography was
experimentally evaluated based on the actual bolus dynamics. The experimental
results show that the controlled table position and the bolus peak position
were highly consistent. The results clearly demonstrate that the proposed
adaptive bolus chasing CT angiography that synchronizes the bolus peak position
with the imaging aperture by a simple adaptive system is computationally and
clinically feasible. Similar techniques may also be applied to conventional
angiography to improve imaging quality and to reduce contrast dose and/or
radiation exposure.
Keywords: CT angiography, contrast studies, automatic control, nonlinear system
