Inclusion Criteria1. Males and females between the age of 18 and 85 who have suffered a stroke confirmed by a CT of the head.
Exclusion Criteria1. You cannot take part in this study unless you have evidence of having a stroke (hemorrhage in your brain).
2. You cannot take part in this study if you are not able to safely have an MRI exam.
3. Women cannot take part in this study if they are pregnant.
4. Women may not participate in this study if they are attempting to become pregnant or think they might be pregnant. We will provide a one-time pregnancy test for anyone who is uncertain about being pregnant.
5. You cannot take part in this study if you have evidence of a large amount of calcifications found on CT exams that have been performed as part of the clinical evaluation for your current condition.