FERRIC AMMONIUM CITRATE-CELLULOSE PASTE FOR OPACIFICATION OF THE ESOPHAGEAL LUMEN ON MRI

Objective: A new ferric ammonium citrate-cellulose mixture for use in MRI of the esophagus was evaluated for its ability to opacify the esop hageal lumen. Materials and Methods: Thirty-two patients with esophage al disorders and ten patients with normal esophagus undergoing MRI at 1.5 T were given similar to 100 ml of the newly developed high-viscosi ty esophageal contrast preparation. Moreover, six of the patients with esophageal cancer were subjected to a second examination after radiat ion therapy. A total of 48 MR imagings were performed.Results: Of the patients examined, successful esophageal opacification, graded as exce llent, was obtained in 84.2, 78.9, and 57.9%, of the sagittal, axial, and coronal images, respectively. In cases of extrinsic disease involv ing the esophagus the contrast medium administration allowed the easy differentiation of the esophagus from adjacent mass lesions and proved very useful in identifying displacement and compression. In cases of esophageal carcinoma the contrast medium administration assisted in th e measurement of wall thickness and length of the lesion as well as in the identification of the site of origin of the tumor. Conclusion: Th e results indicate that this product effectively opacifies the esophag eal lumen in the majority of patients. We found that it is easy to use , is well tolerated, and does not produce artifacts.