Preliminary study on MR colonography with air enema in detection of colorectal neoplasms  

作　　者：LUO Ming-yue LIU Li YAN Fu-hua SHEN Ji-zhang YAO Li-qing ZHOU Kang-rong 

机构地区：[1]Department of Radiology, the Sixth Affiliated Hospital of Sun Yat-sen University, Guangzhou, Guangdong 510655, China [2]Statistics Bureau of Guangzhou Economic and Technological Development District, Guangzhou, Guangdong 510530, China [3]Department of Radiology , Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, China [4]Department of Radiology , Endoscopy Center,Zhongshan Hospital Affiliated to Fudan University, Shanghai 200032, China

出　　处：《Chinese Medical Journal》2010年第18期2527-2531,共5页中华医学杂志（英文版）

摘　　要：Background The few studies on MR colonography with air enema involved feasibility of bowel distention and imaging quality and lacked detection sensitivity of colorectal neoplasms. The purpose of this prospective study was to assess the detection sensitivity of colorectal neoplasms with the three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography with air enema. Methods A total of 30 patients scheduled for optical colonoscopy due to rectal bleeding, positive fecal occult blood test results or altered bowel habits were recruited and successfully underwent entire colorectal examinations with three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography and subsequent optical colonoscopy on the same day. Detection sensitivity of colorectal neoplasms with MR colonography was statistically analyzed on a per-neoplasm size basis by using findings from optical colonoscopy and histopathological examinations as the reference standards. Results Seventy-six neoplasms were detected with optical colonoscopy, consisting of 1 mm-5 mm （n=11）, 6 mm-9 mm （n=29） and 〉10 mm （n=-36） in diameter. Detection sensitivities of 1 mm-5 mm, 6 mm-9 mm, 〉10 mm and 〉6 mm colorectal neoplasms with MR colonography were 9.1%, 75.9%, 100% and 89.2%, respectively; overall detection sensitivity for all sizes colorectal neoplasms was 77.6%. Conclusions Detection sensitivity of three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography with air enema is low for 1 mm-5 mm colorectal neoplasms, but the detection sensitivity is 89.2% for ≥6 mm neoplasms, and all ≥10 mm neoplasms could be detected.Background The few studies on MR colonography with air enema involved feasibility of bowel distention and imaging quality and lacked detection sensitivity of colorectal neoplasms. The purpose of this prospective study was to assess the detection sensitivity of colorectal neoplasms with the three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography with air enema. Methods A total of 30 patients scheduled for optical colonoscopy due to rectal bleeding, positive fecal occult blood test results or altered bowel habits were recruited and successfully underwent entire colorectal examinations with three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography and subsequent optical colonoscopy on the same day. Detection sensitivity of colorectal neoplasms with MR colonography was statistically analyzed on a per-neoplasm size basis by using findings from optical colonoscopy and histopathological examinations as the reference standards. Results Seventy-six neoplasms were detected with optical colonoscopy, consisting of 1 mm-5 mm （n=11）, 6 mm-9 mm （n=29） and 〉10 mm （n=-36） in diameter. Detection sensitivities of 1 mm-5 mm, 6 mm-9 mm, 〉10 mm and 〉6 mm colorectal neoplasms with MR colonography were 9.1%, 75.9%, 100% and 89.2%, respectively; overall detection sensitivity for all sizes colorectal neoplasms was 77.6%. Conclusions Detection sensitivity of three-dimensional Fourier transform fast spoiled gradient-recalled MR colonography with air enema is low for 1 mm-5 mm colorectal neoplasms, but the detection sensitivity is 89.2% for ≥6 mm neoplasms, and all ≥10 mm neoplasms could be detected.

关 键 词：COLORECTUM CANCER POLYPS MR COLONOGRAPHY 

分 类 号：R686[医药卫生—骨科学]