Adaptive Bolus Chasing Computed Tomography Angiography: Control Scheme and Experimental Results.
In this paper, a new adaptive bolus-chasing control scheme is proposed to synchronize the bolus peak in a patient's vascular system and the imaging aperture of a computed tomography (CT) scanner. The proposed control scheme is theoretically evaluated and experimentally tested on a modified Siemens SOMATOM Volume Zoom CT scanner. The first set of experimental results are reported on bolus-chasing CT angiography using realistic bolus dynamics, real-time CT imaging and adaptive table control with physical vasculature phantoms. The data demonstrate that the proposed control approach tracks the bolus propagation well, and clearly outperforms the constant-speed scheme that is the current clinical standard.
Department of Electrical and Computer Engineering, University of Iowa, Iowa City, IA, 52242.
Zhijun
Z
Cai
Colbin
C
Erdahl
Kai
K
Zeng
Tom
T
Potts
Melhem
M
Sharafuddin
Osama
O
Saba
Ge
G
Wang
Er-Wei
EW
Bai