title: Study of an adaptive bolus chasing CT angiography.
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.
authors.affiliation: Department of Electrical and Computer Engineering, University of Iowa, Iowa City, IA 52242, USA.
authors.forename: Er-Wei
authors.initials: EW
authors.lastname: Bai
authors.affiliation: Department of Radiology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
authors.forename: James R
authors.initials: JR
authors.lastname: Bennett
authors.affiliation: Department of Electrical and Computer Engineering, University of Iowa, Iowa City, IA 52242, USA.
authors.forename: Robert
authors.initials: R
authors.lastname: McCabe
authors.affiliation: Department of Radiology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
authors.forename: Melhem J
authors.initials: MJ
authors.lastname: Sharafuddin
authors.affiliation: Department of Electrical and Computer Engineering, Iowa State University, Ames, IA 50011, USA.
authors.forename: Henri
authors.initials: H
authors.lastname: Bai
authors.affiliation: Department of Radiology, Cedar Valley Medical Specialists, 602 Ansborough Ave, Waterloo, IA 50604, USA.
authors.forename: John
authors.initials: J
authors.lastname: Halloran
authors.affiliation: Department of Radiology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
authors.forename: Michael
authors.initials: M
authors.lastname: Vannier
authors.affiliation: Controlled Cardiac CT, Iowa City, IA 52246, USA.
authors.forename: Ying
authors.initials: Y
authors.lastname: Liu
authors.affiliation: Controlled Cardiac CT, Iowa City, IA 52246, USA.
authors.forename: Chenglin
authors.initials: C
authors.lastname: Wang
authors.affiliation: Department of Radiology, University of Iowa Carver College of Medicine, Iowa City, IA 52242, USA.
authors.forename: Ge
authors.initials: G
authors.lastname: Wang
keywords: CT angiography; automatic control; contrast studies; nonlinear system