Elliot K. Fishman, of the Website CTisus adds an interesting column on Pearls in CT on his site. He goes like-
"Imaging "pearls" or critical points have been as much a part of radiology as teaching files. Therefore, we are pleased to bring you our new "pearls" section which will bring to our readers key vignettes on imaging. I will do this monthly based on either the current literature or information that comes across my desk. "
Extremely useful or i might say a Pearl of a link for Radiology Residents :-)