A comparison study of laryngography techniques. 150 KVP. plain roentgenography vs. positive contrast roentgenography.

1. In a series of 15 patients having laryngeal tumors, positive contrast laryngography was found to be superior to the 150 kvp. plain roentgenography in both tumor detection and delineation.2. However, the subglottic region was equally well visualized by both techniques.3. When positive contrast laryngography is technically unsatisfactory or contraindicated, 150 kvp. plain roentgenography offers an alternative method, especially as regards evaluation of subglottic involvement by tumor.