Sequential changes of cerebral regional blood flow and parenchymal perfusion were examined with dynamic CT in 12 patients with arteriosclerotic occlusive disease before and after vascular reconstructive surgery. ROI density values were recorded bilaterally in corresponding regions of the brain tissue and vessels. Interpretation is based on transient time of the bolus (timing of peak), delay of the peak and amplitude of the change of density-time curve. Differences of hemodynamics before and after surgery are demonstrated, a practical technique for measuring the relative perfusion.
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