Does MR describe high signal or high density?

Short message number is low, long signal is high. This pathological change is common in MRI pathology of demyelinating encephalopathy. Need help to send magnetic shock photos for your guidance.

_R is not accurate in judging blood flow. In the case of contrast enhancement, contrast perfusion can be seen. So your question is meaningless. In addition, the magnetic vibration is weighted by T 1 (liquid level low signal) and T2 (liquid level high signal). No one uses magnetic vibration to see the heart and lungs. Only 64-slice CT can do cardiac imaging.