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Detection of Pharyngeal Perforation

Comparison of Aqueous and Barium-Containing Contrast Agents

Marc Keberle1, Guenther Wittenberg1, Andreas Trusen1, Florian Hoppe2 and Dietbert Hahn1

1 Department of Radiology, University of Würzburg, Josef-Schneider-Str. 2, D-97080 Würzburg, Germany.
2 Department of Otorhinolaryngology, Head and Neck Surgery, University of Würzburg, D-97080 Würzburg, Germany.



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  		Fig. 1. —Spot radiograph shows polyethylene tubes (inner diameter, 0.09 cm) filled with (left to right) 100% weight/volume (wt/vol) barium suspension, 50% wt/vol barium suspension, and iodinated aqueous contrast agent. Exposure parameters are automatic exposure, 3 mAs at 70 kV; small focal spot; smallest field of view. Below, CT scans of 100% wt/vol barium suspension, 50% wt/vol barium suspension, and iodinated aqueous contrast agent are presented also showing regions of interest used for determination of respective CT densities.

 


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  		Fig. 2A. —58-year-old man who underwent total laryngectomy and hemipharyngectomy. Pharyngogram obtained with iodinated contrast agent reveals long narrow perforation (arrowheads).

 


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  		Fig. 2B. —58-year-old man who underwent total laryngectomy and hemipharyngectomy. Second pharyngogram obtained with barium-containing contrast agent (100% weight/volume) 12 min after A does not show perforation. Note faint remnants of iodinated contrast agent (arrow).

 

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