General Information:

I was born in Guatemala, received my training in Diagnostic Radiology at the University of Miami followed by a 2-year Neuroradiology fellowship at Emory University in Atlanta.  For a short 18 months I was an Assistant Professor of Radiology at the University of Texas in Houston and then became Chief of the Division of Neuroradiology and Professor of Radiology at the University of North Carolina in Chapel Hill a position I have held for 22 years. My list of publications includes 620 articles (peer review and invited) as principal or co-author and 22 books with the 5th edition of Neuroradiology Companion to be published next year. I have given 960 invited lectures. Currently, I serve as President-Elect of ARRS and a member of its Executive Council. I have been President of ASNR and Editor in Chief of the American Journal of Neuroradiology.  I travel extensively and for information regarding my travel schedule and conferences available click on "Travel Schedule & Conference List" on the navigation panel (right, below my picture). The last page on this site shows some pictures taken during recent events. All information found in this site is current as of November 2015 and is updated regularly.
Main areas of Interest: 
  • Medical publishing and editorial-related issues
  • New neuroimaging techniques
  • Pediatric neuroimaging
  • Brain tumor and seizure imaging
  • Temporal bone imaging
  • Imaging-pathologic correlations
  • Teaching and neuroradiology training

My new book, Changing Perspectives can be bought from  All royalties will be donated to the Foundation of ASNR.
The book contains nearly 50 of my favorite essays published in AJNR during my tenure as its Editor in Chief.