<s>[INST] i had a ct scan done and my doctor has just informed me that it looks like brain ischemia n wants me to have an mri done i dont exactly understand what is gooin to happen if it is ischemia i understand what it is but dont know what happens n if theres a treatment [/INST] Hello, The doctor may be speaking of old areas where ischemia may have once occurred though a CT scan is not terribly sensitive for those things and an MRI would be much better anyway. In addition to the MRI scan, your doctor may wish to recommend an MRA of the head and neck as well which would be much more likely to see points of blockage or narrowing in the cerebrovascular tree that could lead to ischemia in the future. This would allow for some sort of prognostication and avoidance plan for complications to take place depending on what is found. Hope I have answered your query. Let me know if I can assist you further. </s>