Publication
Title
Assessment of neovascular permeability in a pancreatic tumor model using dynamic contrast-enhanced (DCE) MRI with contrast agents of different molecular weights
Author
Abstract
Object We evaluated the relationship of dynamic contrast-enhanced magnetic resonance imaging (DCE-MRI)-derived pharmacokinetic parameters and contrast agents with different molecular weights (MW) in a pancreatic tumor mouse model. Materials and methods Panc02 tumors were induced in mice at the hind leg. DCE-MRI was performed using Gadolinium (Gd)-based contrast agents with different MW: Gd-DOTA (0.5 kDa), P846 (3.5 kDa), and P792 (6.47 kDa). Quantitative vascular parameters (AUC, K trans, V e, and V p) were calculated according to a modified Tofts two-compartment model. Values for all contrast groups were compared for tumor and control (muscle) tissues. Results Values for K trans and V e were significantly higher in tumor tissue than in muscle tissue. When comparing contrast agents, lowest absolute K trans values were observed using P792. The relative increase in K trans in tumor tissue compared with normal tissue was highest after the use of P792. In both tumor and normal tissues, K trans decreased with increasing molecular weight of the contrast agent used. Conclusion It was demonstrated that values for the different DCE-MRI vascular (permeability) parameters are highly dependent on the contrast agent used. Due to their potential to better differentiate tumor from muscle tissue, higher molecular weight contrast agents show promise when evaluating tumors using DCE-MRI.
Language
English
Source (journal)
Magnetic resonance materials in physics, biology, and medicine. - New York
Publication
New York : 2011
ISSN
1352-8661 [online]
0968-5243 [print]
Volume/pages
24:4(2011), p. 225-232
ISI
000295178100004
Full text (Publisher's DOI)
Full text (publisher's version - intranet only)
UAntwerpen
Faculty/Department
Research group
Publication type
Subject
External links
Web of Science
Record
Identification
Creation 23.04.2015
Last edited 28.07.2017