Diffusion-weighted imaging (DWI), being able to detect the diffusion of water molecules in the tissue, is one of the potential techniques for the diagnosis of myocardial infarction without contrast agent administration. In this study, we investigated the diagnostic value of the mono-exponential and stretched exponential DWI model in the assessment of acute myocardial infarction. The preliminary results from 10 patients showed that the diffusion parameters were significantly lower in the infarcted region, and both models had capability of diagnosing acute myocardial infarction with the stretched exponential model performing slightly better.
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