Three-Dimensional Endoscopic Ultrasonography of Gastrointestinal Lesions Using an Ultrasound Probe

BACKGROUND: This study was carried out to ascertain the clinical usefulness and problems of three-dimensional (3D) images obtained with the ultrasound probe. METHODS: Eighteen resected specimens and 21 patients were examined. After the images were recorded on video, 3D displays were produced using a workstation. RESULTS: In the in vitro study the surface images were quite consistent with the macroscopic findings in 17 cases. In 2 esophageal cancers, 7 of 10 gastric cancers, and 2 colonic cancers the depth of tumor invasion was assessed accurately from the reconstructed images. In the in vivo study although 3 D display had some limitations, it was useful in esophageal and rectal lesions. CONCLUSIONS: This new diagnostic method could visualize the 3D extent of gastrointestinal lesions and appears to have a useful clinical application.