Absolute cerebral blood flow and blood volume measured by magnetic resonance imaging bolus tracking: comparison with positron emission tomography values.
Research output: Contribution to journal › Journal article › Research › peer-review
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 language | English |
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Journal | Journal of Cerebral Blood Flow and Metabolism |
Volume | 18 |
Issue number | 4 |
Pages (from-to) | 425-32 |
Number of pages | 7 |
ISSN | 0271-678X |
DOIs | |
Publication status | Published - 1998 |
Externally published | Yes |
ID: 14946851