Greg Zaharchuk1, Ajit Shankaranarayan2, Roland Bammer1, Matus Straka1, David C. Alsop3, Nancy J. Fischbein4, Scott W. Atlas4, Michael E. Moseley1
1Department of Radiology, Stanford
University, Stanford, CA, USA; 2Appled Sciences Laboratory - West,
GE Healthcare, Menlo Park, CA, USA; 3Department of Radiology, Beth
Israel Deaconess Hospital, Boston, MA, USA; 4Department of
Radiology, Stanford University Medical Center, Stanford, CA, USA
ASL imaging is very sensitive to arterial arrival times and can detect abnormalities in patients with normal bolus PWI studies, the most common of which we have termed the watershed sign.