The present invention uses diffusion weighted imaging, comparing to the clinical programs of diffusion weighted imaging and perfusion weighted imaging, perfusion weighted imaging can omitted and the degree of functional characterization of perfusion abnormalities is reflected without the perfusion weighted imaging, to provide {HEAD ~ middle data} of {TAIL ~ brain tissue} can be saved and the risk of thrombolytic therapy 
The present invention uses diffusion weighted imaging , comparing to the clinical programs of diffusion weighted imaging and perfusion weighted imaging , perfusion weighted imaging can omitted and the degree of functional characterization of perfusion abnormalities is reflected without the perfusion weighted imaging , to provide { HEAD ~ middle data } of { TAIL ~ brain tissue } can be saved and the risk of thrombolytic therapy
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