Projection-based bolus detection for computed tomographic angiography.
Computed tomographic (CT) angiography is important for imaging studies on cardiovascular structures, peripheral vessels, and solid organs. In practice, a CT angiography scan is triggered by the bolus arrival at a prespecified anatomical location, which is determined using CT fluoroscopy. In this article, we propose a projection-based method adapted from the Grangeat formula to detect the bolus arrival. Then, we evaluate our new method in numerical and animal studies. Our results indicate that this method allows significantly better temporal resolution and is computationally more efficient, as compared with the image-based methods.
Lu
Donghui
D
CT/Micro-CT Laboratory, Department of Radiology, University of Iowa, Iowa City, IA, USA. donghuilu@ct.radiology.uiowa.edu
Bai
Erwei
E
Liu
Jie
J
Yu
Hengyong
H
Wei
Yuchuan
Y
Cai
Zhijun
Z
Sharafuddin
Melhem J
MJ
Golzarian
Jafar
J
Stolpen
Alan
A
Saba
Osama
O
Vannier
Michael
M
Wang
Ge
G
D000465:Algorithms; D000792:Angiography / Q000379:methods; D000818:Animals; D003287:Contrast Media; D005471:Fluoroscopy / Q000379:methods; D008168:Lung / Q000000981:diagnostic imaging; D008962:Models, Theoretical; D011856:Radiographic Image Enhancement / Q000379:methods; D011857:Radiographic Image Interpretation, Computer-Assisted / Q000379:methods*; D012756:Sheep; D013997:Time Factors; D014057:Tomography, X-Ray Computed / Q000379:methods*
D003287:Contrast Media