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 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 23 years. My list of publications includes over 630 articles (peer review and invited) as principal or co-author and 24 books with the 5th edition of Neuroradiology Companion to be published later this year. I have given over 980 invited lectures and served as Visiting Professor in over 40 occasions. Currently, I serve as President 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, above my picture). All information found in this site is updated regularly.

Last week, May 27, I was named Honorary Member of the Spanish Society of Radiology (SERAM) during its annual meeting in Bilbao, Spain.

During the 2016 JPR/RSNA meeting I was named Honorary Member of the Sao Pablo Radiological Society (SPR). 

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.  

Also, our new books on Critical Findings, DWI/DTI and Spinal Imaging are now available.