1. Axial contrast-enhanced CT images obtained through the level of the floor of the mouth in 2 different patients.
Axial contrast-enhanced CT images obtained through the level of the floor of the mouth in 2 different patients. DE-derived WA image (A) and standard SE (120 kVp) image (B). Mean attenuation values (in Hounsfield units) of the sternomastoid muscle, tongue muscle, and internal jugular vein were obtained at this level by using circular regions of interest, as shown. Objective noise was obtained as the SD of the circular regions of interest drawn in air outside the patient. Noise was obtained in all anatomic levels in a similar way.
A.M. Tawfik et al. AJNR Am J Neuroradiol 2011;32:
©2011 by American Society of Neuroradiology