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Dynamic CT of the neck.

The authors describe a technique for dynamic incremental computed tomography (CT) of the neck with use of slow-power intravenous injection of contrast material. CT scans of the necks of 55 subjects were evaluated with this technique and were found to exhibit adequate opacification of the neck vessels. This method of contrast enhancement enables vessels to be confidently distinguished from enlarged lymph nodes or masses. It also provides information about the boundaries of masses, their vascularity, and their relationship to surrounding structures. In addition, the authors have optimized this technique by reducing contrast material volume while maintaining diagnostic quality.