Hye Jin Kim MD, Presenter: Nothing to Disclose

Ah Young Kim MD, Abstract Co-Author: Nothing to Disclose

Jin hug Lee MD, Abstract Co-Author: Nothing to Disclose

Jeong Hwan Yook MD, Abstract Co-Author: Nothing to Disclose

Seong Tae Oh MD, Abstract Co-Author: Nothing to Disclose

Eun Sil Yu MD, Abstract Co-Author: Nothing to Disclose

Hyun Kwon Ha MD, Abstract Co-Author: Nothing to Disclose

et al, Abstract Co-Author: Nothing to Disclose

To assess clinical performance of MDCT virtual gastroscopy (VG) in localization and characterization of gastric cancer and to compare its results with optical gastroscopic (OG) findings on the basis of histopathologic results

A total of 113 consecutive patients (73 men, 40 women; mean age, 58 years) with proven gastric cancer was included in this study. All patients underwent CT gastrography using 16-channel MDCT and OG within 1-2 weeks. CT scanning was performed in the left posterior oblique, supine, and prone positions. VG images were processed on a commercial workstation by two independent observers to evaluate the localization, tumor staging (early or advanced), and morphologic classifications (Borrmann and Yamada type) of gastric cancer. All patients subsequently underwent surgical resection (88 early and 30 advanced gastric cancers). Findings of CT VG and OG were compared with the pathologic and surgical results. For comparison of VE and OG data, generalized linear mixed model was used, and a P value of less than .05 was determined to indicate statistical significance.

Localization of gastric cancer was correct in 116 (98.3%) of total 118 cancers on CT VG and in 118 (100%) on OG. Regarding differentiation of tumor staging, VG showed correct assessment in 92.6% of early gastric cancer and 85% of advanced cancer (high interobserver agreement, nonweighted k value of 0.94). The results of OG were 88.6% and 86.7%, respectively. As for morphologic classification, VG was correct in 77 cancers (65.3%) while OG was correct in 74 (62.7%) cancers. And these results showed no significant difference between the VG and OG data (P = 0.20).

In localization and morphologic assessment in gastric cancer patients, CT virtual gastroscopy showed excellent results comparable to those of conventional optical gastroscopy.

CT virtual gastroscopy can be a valuable imaging technique comparable to optical gastroscopy in localization and morphologic assessment of gastric cancer.

Kim, H, Kim, A, Lee, J, Yook, J, Oh, S, Yu, E, Ha, H, et al, , Clinical Performance of CT Virtual Gastroscopy in Localization and Characterization of Gastric Cancer: Comparative Analysis with Optical Gastroscopic Findings.  Radiological Society of North America 2006 Scientific Assembly and Annual Meeting, November 26 - December 1, 2006 ,Chicago IL. http://archive.rsna.org/2006/4436788.html