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AJNR - American Journal of Neuroradiology

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CT Perfusion Parameter Values in Regions of Diffusion Abnormalities

Marcello Galvez^a, Gerald E. York, II^a and James D. Eastwood^a

^a From the Department of Radiology/Neuroradiology, Duke University Medical Center, Durham, NC

View larger version (17K): [in a new window]   FIG 1. Histogram of ADC values in both normal contralateral brain and a region of interest including infarct (abnormal).

View larger version (43K): [in a new window]   FIG 2. Images demonstrate the region >2 SDs above the mean abnormal restriction. Left, diffusion-weighted image (b=1000 s/mm2). Right, Mask.

View larger version (56K): [in a new window]   FIG 3. Images with decreased signal intensity and the region with >30% decrease compared with normal brain parenchyma. Left, ADC images (b=0 s/mm2). Right, Resultant mask.

View larger version (32K): [in a new window]   FIG 4. Images demonstrate the corresponding decrease in CBF in the region of diffusion abnormality. Left, CBF map. Middle, Overlays of the masks from the diffusion-weighted image. Right, Overlay of the mask from the ADC.