Dynamic contrast-enhanced quantitative perfusion measurement of the brain using T-1-weighted MRI at 3T

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H.B.W. Larsson, A.E. Hansen, H.K. Berg, E. Rostrup, O. Haraldseth

Purpose: To develop a method for the measurement of brain perfusion based on dynamic contrast-enhanced T-1-weighted MR imaging. Materials and Methods: Dynamic imaging of the first pass of a bolus of a paramagnetic contrast agent was performed using a 3T whole-body magnet and a T-1-weighted fast field echo sequence. The input function was obtained from the internal carotid artery. An initial T-1 measurement was performed in order to convert the MR signal to concentration of the contrast agent. Pixelwise and region of interest (ROI)based calculation of cerebral perfusion (CBF) was performed using Tikhonov's procedure of deconvolution. Seven patients with acute optic neuritis and two patients with acute stroke were investigated. Results: The mean perfusion value for ROIs in gray matter was 62 mL/100g/min and 21 mL/100g/min in white matter in patients with acute optic neuritis. The perfusion inside the infarct core was, 9 mL/100g/min in one of the stroke patients. The other stroke patient had postischemic hyperperfusion and CBF was 140 mL/100g/min. Conclusion: Absolute values of brain perfusion can be obtained using dynamic contrast-enhanced MRI. These values correspond,to expected values from established PET methods. Furthermore, at 3T pixelwise calculation can be performed, allowing construction of CBF maps
Udgivelsesdato: 2008/4
TidsskriftJournal of Magnetic Resonance Imaging
Sider (fra-til)754-762
Antal sider8
StatusUdgivet - 2008

Bibliografisk note

Times Cited: 0ArticleEnglishLarsson, H. B. WUniv Copenhagen, Glostrup Hosp, Funct Imaging Unit, Ndr Ringvej 57, DK-2600 Glostrup, DenmarkCited References Count: 35284MCJOHN WILEY & SONS INC111 RIVER ST, HOBOKEN, NJ 07030 USAHOBOKEN

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