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Model of the human vasculature for studying the influence of contrast injection speed on cerebral perfusion MRI
Author(s) -
van Osch Matthias J.P.,
Vonken Evertjan P.A.,
Wu Ona,
Viergever Max A.,
van der Grond Jeroen,
Bakker Chris J.G.
Publication year - 2003
Publication title -
magnetic resonance in medicine
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 1.696
H-Index - 225
eISSN - 1522-2594
pISSN - 0740-3194
DOI - 10.1002/mrm.10567
Subject(s) - perfusion , contrast (vision) , cerebral blood flow , dynamic contrast , dynamic contrast enhanced mri , population , blood flow , perfusion scanning , magnetic resonance imaging , cerebral perfusion pressure , nuclear magnetic resonance , biomedical engineering , computer science , medicine , cardiology , radiology , physics , artificial intelligence , environmental health
Simulations of dynamic susceptibility contrast (DSC) MRI are frequently performed by assuming a certain shape for the input function and the microvascular response function. However, to investigate the influence of parameters that will affect the shape of the input function, a more complex model of the human vasculature is required. In this study, a model of the human vasculature is proposed that consists of a network of vascular operators based on physiological data typical of a 35‐year‐old male subject. The simulated contrast passage curves were found to be within the range of observed contrast passage curves in a population of patients without vascular disease. The model was used to predict the effect of different injection speeds of the contrast agent on the accuracy of the perfusion experiment. It was found that injection speeds of <3 ml/s lead to an underestimation of the observed cerebral blood flow (CBF). Additionally, it was determined that decreasing the temporal resolution of the acquisition results in an underestimation of the CBF values, and an increase of the standard deviation (SD) of CBF measurements. Magn Reson Med 50:614–622, 2003. © 2003 Wiley‐Liss, Inc.