NDLI: Value of diffusion-weighted imaging and apparent diffusion coefficient in recent cerebral infarctions: a correlative study with contrast-enhanced t1-weighted imaging.

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Value of diffusion-weighted imaging and apparent diffusion coefficient in recent cerebral infarctions: a correlative study with contrast-enhanced t1-weighted imaging.

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Author	Yamada, Naoaki Imakita, Satoshi Sakuma, Toshiharu
Abstract	BACKGROUND AND PURPOSE: The clinical usefulness and the time course of diffusionweighted imaging and apparent diffusion coefficient (ADC) in acute and subacute cerebral infarction have not yet been established, although it is known that contrast-enhanced T1weighted spin-echo imaging can detect a subacute infarct. Our aim was to study which imaging technique is useful in detecting recent infarcts, and whether an increase in ADC or a decrease in signal intensity on diffusion-weighted images is correlated with enhancement on T1-weighted spin-echo images. METHODS: Forty-one infarctions with a duration of 9 hours to 27 days were studied in 29 patients. The ADC and signal intensity on diffusion-weighted images were compared with the contrast-enhancement ratio (CER) on T1-weighted spin-echo images (CER � signal intensity after contrast injection/signal intensity before contrast injection). RESULTS: ADC was linearly correlated with CER, and signal intensity on diffusion-weighted images was inversely correlated with CER. The correlation between ADC and age of the infarct in the subacute phase was weak. CONCLUSION: Diffusion-weighted and contrast-enhanced T1-weighted spin-echo images
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Subject Keyword	Apparent Diffusion Coefficient Correlative Study Diffusion-weighted Imaging Contrast-enhanced T1-weighted Imaging Diffusion-weighted Image Recent Cerebral Infarction Signal Intensity T1-weighted Spin-echo Image Contrast Injection Signal Intensity Subacute Phase Clinical Usefulness Diffusionweighted Imaging Contrast-enhanced T1weighted Spin-echo Imaging Recent Infarct Contrast Injection Contrast-enhancement Ratio Time Course Subacute Infarct Subacute Cerebral Infarction Contrast-enhanced T1-weighted Spin-echo Image Cer Signal Intensity
Content Type	Text

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