Der Radiologe
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Comparative Study
[The MR phase contrast method. Determination of blood flow velocity and flow profile of intracranial arteries].
2D-phase-contrast mapping is a MR method that allows for quantitative measurements of blood flow velocity in intracranial vessels. Using a modified FISP-Sequence with a 1.5 T MR scanner, flow studies were carried out on a phantom. Two matrix sizes (256 x 256 vs. 256 x 512) were compared. ⋯ The blood flow velocity in the MCA determined by 2DPK was lower than the TCD values. Using a 256 x 512 matrix, the acquired data were in better accordance with the TCD findings. Due to significant noise measurements of the ACA and PCA were frequently degraded.