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Radiology Resident Evaluation of Head CT Scan Orders in the Emergency Department

William K. Erlya, William G. Bergera, Elizabeth Krupinskia, Joachim F. Seegera and John A. Guistob

a Department of Radiology, University of Arizona Health Sciences Center, Tucson
b Department of Surgery, University of Arizona Health Sciences Center, Tucson



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  		FIG 1. Axial CT scan (A) and MR image (B) show false-negative finding involving ischemic disease.

A, Acute right occipital infarct is visible as both hypoattenuating gray matter and hypoattenuating white matter, with associated sulcal effacement (arrows).

B, Proton density–weighted (2400/30 [TR/TE]) MR image confirms the findings (arrows).



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  		FIG 2. Axial CT image obtained in a patient with schizencephaly and callosal dysgenesis shows an error in synthesis that was considered significant. Note the communication of the right lateral ventricle with the subarachnoid space (arrows) and the characteristic configuration of the occipital horns.



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  		FIG 3. Contiguous 5-mm non–contrast-enhanced routine axial CT scans demonstrate a large mass (arrows) in the sella in a case of pituitary macroadenoma.



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  		FIG 4. Axial images show metastatic disease interpreted as infarction.

A, CT image shows a right frontal lobe mass (arrows).

B, On the CT section adjacent to A, vasogenic edema (arrows) is evident.

C, Contrast-enhanced MR image more clearly shows the mass (arrows).





Copyright © 2009 by the American Society of Neuroradiology. Print ISSN: 0195-6108 Online ISSN: 1936-959X