Absolute cerebral blood flow and blood volume measured by magnetic resonance imaging bolus tracking: comparison with positron emission tomography values

Publication: Research - peer-reviewJournal article

The authors determined cerebral blood flow (CBF) with magnetic resonance imaging (MRI) of contrast agent bolus passage and compared the results with those obtained by O-15 labeled water (H215O) and positron emission tomography (PET). Six pigs were examined by MRI and PET under normo- and hypercapnic conditions. After dose normalization and introduction of an empirical constant phi Gd, absolute regional CBF was calculated from MRI. The spatial resolution and the signal-to-noise ratio of CBF measurements by MRI were better than by the H215O-PET protocol. Magnetic resonance imaging cerebral blood volume (CBV) estimates obtained using this normalization constant correlated well with values obtained by O-15 labeled carbonmonooxide (C15O) PET. However, PET CBV values were approximately 2.5 times larger than absolute MRI CBV values, supporting the hypothesized sensitivity of MRI to small vessels.
Original languageEnglish
JournalJournal of Cerebral Blood Flow and Metabolism
Volume18
Issue number4
Pages (from-to)425-32
Number of pages7
ISSN0271-678X
DOIs
StatePublished - 1998

    Keywords

  • Animals, Blood Volume, Carbon Monoxide, Cerebrovascular Circulation, Contrast Media, Female, Hypercapnia, Image Processing, Computer-Assisted, Magnetic Resonance Imaging, Oxygen Radioisotopes, Swine, Tomography, Emission-Computed

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