A control point interpolation method for the non-parametric quantification of cerebral haemodynamics from dynamic susceptibility contrast MRI
Journal
NeuroImage
Journal Volume
64
Journal Issue
1
Pages
560-570
Date Issued
2013
Author(s)
Abstract
DSC-MRI analysis is based on tracer kinetic theory and typically involves the deconvolution of the MRI signal in tissue with an arterial input function (AIF), which is an ill-posed inverse problem. The current standard singular value decomposition (SVD) method typically underestimates perfusion and introduces non-physiological oscillations in the resulting residue function. An alternative vascular model (VM) based approach permits only a restricted family of shapes for the residue function, which might not be appropriate in pathologies like stroke. In this work a novel deconvolution algorithm is presented that can estimate both perfusion and residue function shape accurately without requiring the latter to belong to a specific class of functional shapes. A control point interpolation (CPI) method is proposed that represents the residue function by a number of control points (CPs), each having two degrees of freedom (in amplitude and time). A complete residue function shape is then generated from the CPs using a cubic spline interpolation. The CPI method is shown in simulation to be able to estimate cerebral blood flow (CBF) with greater accuracy giving a regression coefficient between true and estimated CBF of 0.96 compared to 0.83 for VM and 0.71 for the circular SVD (oSVD) method. The CPI method was able to accurately estimate the residue function over a wide range of simulated conditions. The CPI method has also been demonstrated on clinical data where a marked difference was observed between the residue function of normally appearing brain parenchyma and infarcted tissue. The CPI method could serve as a viable means to examine the residue function shape under pathological variations. ? 2012 Elsevier Inc.
Subjects
accuracy
algorithm
article
brain blood flow
brain function
brain hemodynamics
brain infarction
brain tissue
controlled study
hemodynamics
human
human tissue
nonparametric test
parenchyma
priority journal
simulation
susceptibility weighted imaging
Algorithms
Blood Flow Velocity
Cerebrovascular Circulation
Cerebrovascular Disorders
Computer Simulation
Contrast Media
Gadolinium DTPA
Humans
Image Interpretation, Computer-Assisted
Magnetic Resonance Imaging
Models, Cardiovascular
Numerical Analysis, Computer-Assisted
Reproducibility of Results
Sensitivity and Specificity
SDGs
Type
journal article