Imaging in critically ill patients is a ubiquitous but challenging line of investigation for the physician as accurate interpretation is often difficult as patient cooperation during the procedure is grossly compromised, and the resultant image is often suboptimal. This book provides details on principles of imaging and the diagnostic hallmarks of common diseases to assist in correct interpretation. It contains guidance to overcome the deficiencies observed during the performance of bedside imaging and equipment handling and addresses the rationale for various procedural management and imaging approaches. This is a useful companion for most doctors and trainees working in critical care settings.