Professor Emeritus of Radiology at the University of Pennsylvania and Professor of Radiology, Neurosurgery, and Neurology at Penn State, Hershey Medical Center, USA.
Why I love to teach
I was the first MR fellow at the University of Pennsylvania and have managed neurological imaging at Dartmouth Medical Center and the University of Pennsylvania for over 40 years. I’ve written two textbooks, authored over 100 publications and received multiple teaching awards. I’m passionate about online radiology education and run an Instagram account called Radphysics, featuring over 600 cases.
Guides with Alexander
Latest articles with Alexander
Distinguishing common adult extra-axial tumors
In this video, you will learn how to recognize the most common adult extra-axial tumors in the posterior fossa—and avoid misdiagnosis—and why you can't use CT scans alone to do this.
Recognizing a subarachnoid hemorrhage on CT
In this video, from our Brain CT Essentials course, you'll learn how to recognize and correctly localize subdural, epidural, and subarachnoid hemorrhages on CT.
Identifying the early CT findings of infarctions
In this video, we'll review the six findings on CT that support the diagnosis of an acute infarction, the three things you must do when looking at a CT scan, and the super-early clues that predict the future onset of an infarction.
Describing the typical appearance of skull fractures
In this video, from our Brain CT Essentials course, we'll teach you a powerful approach for finding subtle fractures on CT and the key clues you should watch for. You'll learn why the plane of the CT is important when searching for fractures, how the ear can help you locate a fracture, and how you should arrange the images for the best possible views.
Discussing subarachnoid hemorrhages in trauma patients
In this video, from our Brain CT Essentials course, you will be able to recognize traumatic subarachnoid hemorrhage and determine when further imaging with CT angiogram (CTA) is prudent.
Recognizing an extra-axial hemorrhage on computed tomography (CT) imaging
In this video, you'll learn how to recognize and correctly localize subdural, epidural, and subarachnoid hemorrhages on CT imaging.