AJDRAJNR - American Journal of Neuroradiology

Published ahead of print on September 26, 2007
doi: 10.3174/ajnr.A0720
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Underestimation of Cerebral Perfusion on Flow-Sensitive Alternating Inversion Recovery Image: Semiquantitative Evaluation with Time-to-Peak Values

H.S. Kima, S.Y. Kima and J.M. Kima

a From the Department of Diagnostic Radiology, Ajou University, College of Medicine, Kyunggido, Republic of Korea


Figure 1
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  		Fig 1. The 3 FAIR maps with use of different TIs: (A) 800 ms, (B) 1200 ms, and (C) 1600 ms; and the corresponding TTP map with ROI (D), and a CBF map (E) obtained from the DSC MR image of a 56-year-old man with severe stenosis of the left proximal ICA. The area of decreased CBF (arrows) on the FAIR map with the shortest (800 ms) and intermediate (1200 ms) TIs is larger than those on the FAIR maps with the longest TI (1600 ms).


Figure 2
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  		Fig 2. A stem-and-leaf plot of the rCBFs between the ipsilateral lesions and contralateral normal areas on the 3 FAIR images in the area with less prolonged TTP (dTTP <3.2 s) (FAIR, 800 ms; TI, 800 ms; FAIR, 1200 ms; TI, 1200 ms; FAIR, 1600 ms; TI, 1600 ms).


Figure 3
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  		Fig 3. A stem-and-leaf plot of the rCBFs between the ipsilateral lesions and contralateral normal areas on the 3 FAIR images in the area with more prolonged TTP (dTTP ≥3.2 s) (FAIR, 800 ms; TI, 800 ms; FAIR, 1200 ms; TI, 1200 ms; FAIR, 1600 ms; TI, 1600 ms).





Copyright © 2008 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X