Akademik Veri Yönetim Sistemi
Turkish Journal of Gastroenterology, cilt.12, sa.1, ss.53-58, 2001 (Scopus)
Background/aims: Colorectal carcinoma is a common cause of death from malignancy and is detected mainly by endoscopic and radiographic examinations. The aim of this study was to evaluate the efficacy of computed tomographic colonography in diagnosing colorectal tumors. Methods: Twenty-three patients suspected of having colorectal tumors on the basis of endoscopic findings and five patients with incomplete colonoscopy were studied by computed tomographic colonography over a 10-month period. The helical computed tomographic images were acquired using rive mm slice thickness, a pitch of 1.3, a reconstruction interval of 3 mm, 120 kV, 110 mA and 512×512 matrix. The results of computed tomographic colonography were compared with the findings of colonoscopy and where present, with the results of surgery and histopathology. Results: A total of 48 lesions were identified on computed tomographic colonography images in 26 patients. All malignant lesions (n=19) were successfully detected with this method. The sensitivities for polyps 10 mm or larger (n=10) and for polyps between 5-9 mm in diameter (n=15) were 90% and 73% respectively. Polyps less than 5 mm in diameter (n=3) were missed. In one patient, cecal inflammation manifesting as mucosal irregularity and nodularity on 3D endoluminal images were noted. Conclusion: Computed tomographic colonography is a useful diagnostic tool for the majority of protruding masses, stenotic tumors and polyps larger than 5 mm in diameter but the current technology is not accurate in defining diminutive polyps.