title: Diagnostic performance of 64-section CT using CT gastrography in preoperative T staging of gastric cancer according to 7th edition of AJCC cancer staging manual.
abstract: OBJECTIVE
  To evaluate the accuracy of 64-section multidetector CT with CT gastrography for determining the depth of mural invasion in patients with gastric cancer according to the 7th edition of the AJCC cancer staging manual.
  
  
  METHODS
  A total of 127 patients with gastric cancer and who had undergone both esophago-gastro-duodenoscopy and 64-section CT were included in this study. Two radiologists independently reviewed the preoperative CT images with respect to the detectability and T-staging of the gastric cancers. The sensitivity, specificity, accuracy and overall accuracy of each reviewer for the T staging of gastric cancer were calculated.
  
  
  RESULTS
  Overall, gastric cancer was detected in 123 (96.9%) of the 127 cancers on the CT images. Reviewer 1 correctly staged 98 gastric cancers, and reviewer 2 correctly classified 105 gastric cancers. The overall diagnostic accuracy of the T staging was 77.2% (98/127) for reviewer 1 and 82.7% (105/127) for reviewer 2.
  
  
  CONCLUSIONS
  64-section CT using CT gastrography showed a reasonable diagnostic performance for determining the T staging in patients with gastric cancer according to the 7th edition of the AJCC cancer staging manual.
  
  
  CONCLUSIONS
  64-section CT is useful for determining the T staging of gastric cancer Virtual gastroscopy is helpful for detecting early gastric cancer New CT criteria may be applicable to the T staging The normal gastric wall frequently shows a multilayered pattern.
authors.affiliation: Department of Radiology, Chonnam National University Hwasun Hospital, Hwasun-gun, Jeollanam-do, South Korea.
authors.forename: Jin Woong
authors.initials: JW
authors.lastname: Kim
authors.forename: Sang Soo
authors.initials: SS
authors.lastname: Shin
authors.forename: Suk Hee
authors.initials: SH
authors.lastname: Heo
authors.forename: Yoo Duk
authors.initials: YD
authors.lastname: Choi
authors.forename: Hyo Soon
authors.initials: HS
authors.lastname: Lim
authors.forename: Young Kyu
authors.initials: YK
authors.lastname: Park
authors.forename: Chang Hwan
authors.initials: CH
authors.lastname: Park
authors.forename: Yong Yeon
authors.initials: YY
authors.lastname: Jeong
authors.forename: Heoung Keun
authors.initials: HK
authors.lastname: Kang
mesh_terms: D000328:Adult; D000368:Aged; D000369:Aged, 80 and over; D016009:Chi-Square Distribution; D003287:Contrast Media; D005260:Female; D006801:Humans; D008297:Male; D008875:Middle Aged; D009367:Neoplasm Staging; D017410:Practice Guidelines as Topic; D011300:Preoperative Care; D012680:Sensitivity and Specificity; D013274:Stomach Neoplasms / Q000000981:diagnostic imaging* / Q000473:pathology; D014057:Tomography, X-Ray Computed / Q000379:methods*
chemical_list: D003287:Contrast Media