DocumentCode :
953886
Title :
A Novel Angiographic Methodology for the Quantification of Angiogenesis
Author :
Gounis, Matthew J. ; Lieber, Baruch B. ; Webster, Keith A. ; Wakhloo, Ajay K.
Author_Institution :
Univ. of Massachusetts, Worcester
Volume :
55
Issue :
3
fYear :
2008
fDate :
3/1/2008 12:00:00 AM
Firstpage :
996
Lastpage :
1003
Abstract :
The objective is to develop a method to quantify the dynamic information of contrast transport using angiography for investigating angiogenic treatments. In the rabbit hindlimb ischemia model, contrast media transport was examined for both arteries and the microvasculature. Time histories of image intensity were constructed and modeled. The differences in contrast transport quantified by the parameters of the mathematical model were statistically compared between animals treated with an adenoviral vector that expressed vascular endothelial growth factor and untreated animals. The data reveal that after one week of ischemia, treated animals have a statistical increase in the number of large vessels that convect blood more efficiently. This analysis further shows a statistically significant increase in the angiographic blush in the treated animals. A methodology is described that offers the capability of examining the number and geometry of large arteries, the dynamics of contrast transport, and the amount of angiographic blush that is related to microvascular density. In therapeutic angiogenesis, numerous techniques are used to measure variables such as the angiographic score, capillary density, and regional blood flow. The analysis presented herein can offer information of these variables, and is transferable from the laboratory to the clinical arena.
Keywords :
biotransport; blood vessels; diagnostic radiography; diseases; genetics; haemodynamics; haemorheology; patient treatment; adenoviral vector; angiogenesis quantification; angiogenic treatments; angiographic methodology; angiographic score; capillary density; contrast transport information; gene therapy; image intensity; microvascular density; microvasculature examination; rabbit hindlimb ischemia model; regional blood flow; vascular endothelial growth factor expression; Angiography; Animals; Arteries; Blood; Density measurement; Geometry; History; Ischemic pain; Mathematical model; Rabbits; Angiogenesis; Angiography; Gene Therapy; Ischemia; Mathematical Modeling; angiography; gene therapy; ischemia; mathematical modeling; Algorithms; Animals; Hindlimb; Ischemia; Microcirculation; Neovascularization, Physiologic; Rabbits; Radiographic Image Enhancement; Radiographic Image Interpretation, Computer-Assisted; Reproducibility of Results; Sensitivity and Specificity;
fLanguage :
English
Journal_Title :
Biomedical Engineering, IEEE Transactions on
Publisher :
ieee
ISSN :
0018-9294
Type :
jour
DOI :
10.1109/TBME.2007.906489
Filename :
4360126
Link To Document :
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