Portal de Periódicos da CAPES

MRI of gastric carcinoma: Results of T and N-staging in an in vitro study

2009; Baishideng Publishing Group; Volume: 15; Issue: 32 Linguagem: Inglês

10.3748/wjg.15.3992

2219-2840

Il Young Kim, Sang Won Kim, Hyeong Cheol Shin, Moon Soo Lee, Dong Jun Jeong, Chang Jin Kim, Young Tong Kim,

Radiomics and Machine Learning in Medical Imaging

AIM:To determine the accuracy of 1.5-T magnetic resonance imaging (MRI) in the evaluation of gastric wall invasion and perigastric lymph node metastasis in gastric adenocarcinoma. METHODS:Twenty resected gastric specimens containing 20 tumors were studied with a 1.5-T MR system using a commercial head surface coil.MR scanning was performed with a T1 weighted image (TR/TE = 500/20), and a T2 weighted image (TR/TE = 2500/90).MR findings were compared with pathologic findings. RESULTS:A T1-weighted image demonstrated three layers in the normal gastric wall.All of the gastric tumors were well demonstrated by lesions and location.In a MRI findings of gastric wall invasion, there was 1 case of T1, 7 of T2, 11 of T3.Pathologic results of resected specimens included 3 cases of pT1, 4 of pT2, and 12 of pT3.The accuracy of T staging with MRI was 74% (14 of 19).MRI findings of lymph node me-tastasis included 6 cases of N0, 13 cases of N1.The accuracy of the N staging with MRI was 47% (9 of 19).CONCLUSION: MRI has a high diagnostic accuracy in the evaluation of the T staging of gastric cancer in vitro and thus potentially enables preoperative histopathologic staging.