I cannot recommend Dr. Krishnam's Emergency Radiology more highly.
Given the breadth of knowledge facing a radiologist in training, efficiency is of utmost importance. Despite the wealth of contained information, this book is incredibly easy to navigate, which is especially important when taking call. I have a subscription to statdx and have burned through various texts; however, when I am on ER call, the first, and typically last, resource I access is Krishnam's book. It's actually the only book I take on call, and as a matter of fact, I've made it a point to leave a copy in the ER reading room at all times for my colleagues. The format is well thought out with sections organized by body region and imaging modalities as well as separate sections on skeletal trauma and pediatrics. Additional miscellaneous sections fill in the blanks. For example, I've frequently encountered physician questions on nephrogenic systemic fibrosis and iodinated contrast reactions. In my experience, if it has to do with Emergency Radiology, this book will not hang you out to dry.
One of my favorite aspects of the book is the logical organization within each section. Related subsections immediately follow each section (e.g. Facial trauma is followed by ZMC, NOE, Lefort, orbital trauma, etc.) Following each heading, information is presented such that it coincides with your general thought process. Clinical history or, in the case of trauma, mechanism, is followed by imaging technique, findings, and a separate box which discusses clinical pearls. Equipped with a comprehensive table of contents at the beginning, a short table of contents under each chapter heading, and a thorough index, I can typically find and read what I'm looking for in less than a minute.
One of my pet peeves when I open a book is finding horrible quality pictures that frankly look nothing like what comes out of my scanner (something I find to be common but unacceptable in radiology texts.) Emergency Radiology doesn't disappoint. The example images are clear, high resolution, large enough so you don't have to squint, and provide classic appearances. If you actually have time on call (IE-not superbowl weekend, New Year's Eve, Halloween, full moon, and so forth,) there are also sources for additional suggested reading which undoubtedly were carefully selected. The font is easy on the eyes, and the pages are crisp but without glare.
I have a very high threshold when deciding to make a purchase, and I have no remorse regarding this book. While I am currently a resident taking ER call, I should also stress that this book is an excellent reference for radiologists of all levels. I would not hesitate to pull the trigger on Krishnam's Emergency Radiology. If you're as hesitant in making purchases as I am, you can always preview the book online and decide for yourself.