Top differential diagnoses for multifocal "black dots" on T2/T2* MR include various etiologies of small hemorrhages:

• hypertensive microhemorrhages
• ischemic stroke with microhemorrhages
• multiple cavernous malformations (type 4)
• diffuse axonal injury
• hemorrhagic metastases

However, each of the above mentioned differential diagnoses has different clinical scenario and other supportive imaging features.