1. Variation in Use of Head Computed Tomography by Emergency Physicians
Luciano M. Prevedello, MD, Ali S. Raja, MD, MBA, MPH, Richard D. Zane, MD, Aaron Sodickson, MD, PhD, Stuart Lipsitz, ScD, Louise Schneider, MD, Richard Hanson, Srinivasan Mukundan, PhD, MD, Ramin Khorasani, MD, MPH 
The American Journal of Medicine 
Volume 125, Issue 4, Pages (April 2012)
DOI: /j.amjmed
Copyright © 2012 Elsevier Inc. Terms and Conditions

2. Figure 1
Crude head CT ordering rates by physician in relation to 5 different clinical scenarios. Error bars indicate 1 standard error from the mean.
The American Journal of Medicine  , DOI: ( /j.amjmed )
Copyright © 2012 Elsevier Inc. Terms and Conditions

3. Figure 2
Crude and adjusted overall head CT ordering rates by physician.
The American Journal of Medicine  , DOI: ( /j.amjmed )
Copyright © 2012 Elsevier Inc. Terms and Conditions

4. Figure 3
Crude and adjusted head CT ordering rates by physician in patients with atraumatic headache.
The American Journal of Medicine  , DOI: ( /j.amjmed )
Copyright © 2012 Elsevier Inc. Terms and Conditions