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English: F1: Diffusion weighted imaging (A) and fractional anisotrophy (B) measurement in patient with transient ischemic attack (64-year-old man with transient right extremity weakness. Yet neurologic deficits were completely resolved in 6 h). Diffusion weighted imaging (C) and fractional anisotrophy (D) measurement in patient with stroke (50-year-old man with dysarthria and right extremity weakness). In transient ischemic attack patient, rAIb = 1000 was 1.58 and rFA was 0.89. In stroke patient, rAIb = 1000 was 2.25 and rFA was 0.57. rAIb = 1000 was significantly lower in transient ischemic attack patients compared with that of stroke patients, while rFA was significantly higher in transient ischemic attack patients compared with that of stroke patients. rAI = average signal intensity, rFA = fractional anisotrophy ratio