Document Detail

Adaptive Bolus-chasing Computed Tomography Angiography in the Cases of Symmetric and Asymmetric Arterial Flows in Peripheral Arteries.
MedLine Citation:
PMID:  20419058     Owner:  NLM     Status:  Publisher    
Synchronization of the contrast bolus peak and CT imaging aperture is a crucial issue for computed tomography angiography (CTA). It affects the CTA image quality and the amount of contrast dose. A whole-body CTA procedure means to scan from the abdominal aorta to pedal arteries. In this context, the synchronization is much more difficult with the asymmetric arterial flow in lower extremities than in the case of symmetric arterial flow. In this paper, we propose an adaptive optimal controller to chase the contrast bolus peak while it propagates in the aorta and lower extremities with symmetric flow. In the case of asymmetric flow after the contrast bolus splitting into two lower limbs, we propose a dynamic programming approach to cover the lower limbs optimally. Simulation and experimental results show that the proposed methods outperform the current constant-speed method substantially.
Zhijun Cai; Ge Wang; Er-Wei Bai
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Publication Detail:
Journal Detail:
Title:  Biomedical signal processing and control     Volume:  4     ISSN:  1746-8094     ISO Abbreviation:  -     Publication Date:  2009 Oct 
Date Detail:
Created Date:  2010-7-13     Completed Date:  -     Revised Date:  -    
Medline Journal Info:
Nlm Unique ID:  101317299     Medline TA:  Biomed Signal Process Control     Country:  -    
Other Details:
Languages:  ENG     Pagination:  302-308     Citation Subset:  -    
Department of Electrical and Computer Engineering, University of Iowa, Iowa City, IA, 52242.
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Grant Support
R33 EB004287-05//NIBIB NIH HHS

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