Abstract #4032

Changes Over Time in Intracranial Aneurysms Monitored with MRA/I

David Saloner^1,2, Daniel Hurwit^1,2, Vitaliy Rayz^1,2, Loic Boussel³, Alastair Martin¹, William Young⁴, Wade Smith⁵, Nerissa Ko⁵, Michael Lawton⁶

¹Radiology & Biomedical Imaging, University of California San Francisco, San Francisco, CA, United States; ²Radiology, VA Medical Center San Francisco, San Francisco, CA, United States; ³Radiology, Louis Pradel Hospital, Lyon, France; ⁴Anesthesiology, University of California San Francisco, San Francisco, CA, United States; ⁵Neurology, University of California San Francisco, San Francisco, CA, United States; ⁶Neurosurgery, University of California San Francisco, San Francisco, CA, United States

Patients with untreated intracranial aneurysms were imaged at serial intervals to monitor changes in those aneurysms over time. CE-MRA and balanced steady state imaging were performed to assess changes in lumen and intralumenal thrombus. In 36% of interval studies there were no changes; in 30% there was a reduction in lumenal volume secondary to thrombus deposition; and the remaining subjects showed lumenal growth both for aneurysms in the anterior and posterior circulation. 3D MRA/I methods are powerful tools for the non-invasive monitoring of evolution of vascular disease.