Fig 1. MR imaging examinations during the study. MTT indicates mean transit time; rCBF/CBV, regional cerebral blood flow/volume; Vt, venous thrombosis; ICH, intracerebral hemorrhage. *All 3 examinations in one patient. **Included in the 22 postprocedural MRI with new MR lesions. The 10 follow-up examinations are not included in this figure.