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Feasibility study of MRI Multi-FIASTA sequence for evaluating the function of ileocecal valve in patients with ileocecal inflammatory |
MENG Hongxiu1, LIU Yujia2, DONG Lijie2, TIAN Chunmei2, WANG Xia3, CHEN Liang2 |
1 Department of Gastroenterology, Wudi People Hospital, Binzhou251900,P.R.China; 2 Ddepartment of CT,Dongying People Hospital; 3 Department of radiology, Binzhou Medical University Hospital; 4 Oral college, Binzhou Medical University |
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Abstract Objective To study the function evaluation of ileocecal valve in ileocecal inflammatory lesions using MR FIESTA small intestine film imaging . Methods From February 2018 to February 2019, 17 patients were diagnosed by enteroscopy and pathology as inflammatory lesions of the ileus were collected, including 9 males and 8 females, range, 18~45 years, with a median age of 38year old. All patients met the inclusion criteria and signed informed consent.In the 50 minutes before the MR scan, 2000 ml non-absorbable fluid(mannitol,2.5%) was ingested at a rate of 200 mL/5 min. After drinking mannitol for 90-100 minutes, the ileocecal valve was dynamically observed in the 2D-FIESTA-cine sequence without breath-hold. The opening times of ileocecal valve and the presence or absence of reflux were observed within 2 minutes. MR multi-FIESTA sequence scanning parameters are: TR 3.3 MS, TE minum, turning angle: 50 °; FOV420 × 420mm; Matrix: 256 × 256; Layer thickness: 6.5 mm. After the scan is completed, the images is transmitted to the post-processing workstation (GE ADW4.7). Two senior radiologists measured and analyzed the images of different patients, and discuss the differences in diagnosis. The observation indicators include: ①Observe the anatomical structure of the ileocecal valve and measure the thickness and length; ②Observe the movement of the ileocecal valve and recorded whether there is a return flow; ③Record the effective opening of ileocecal valve (the ileocecal valve open and can be observed to discharge water into the colon) and the ineffective opening of ileocecal valve (only the ileocecal valve was observed opened but not can be observed to discharge water into the colon). Results Continuous observation for 2 minutes 4 patients with internal regurgitation were opened 8 times per minute (all were effectively opened),6 patients with internal regurgitation were opened 9 times per minute (1 invalid opening and 5 effective opening),7 patients with internal regurgitation were opened 10 times per minute (3 cases of effective opening, 4 cases of invalid opening), and the average number of openings was 9 / min; There was no return flowing. In the inflammatory lesions of the ileocecal junction, the thickness of the ileocecal valve increased, the average thickness of the upper lip was 0.61 cm, the average thickness of the lower lip was 0.63 cm, and the average length of the blind valve was 1.68 cm. The number of ileocecal valve opening increased, but the contraction of the ileum became smaller. Conclusion MRI Multi-FIESTA is fast scan technique , can dynamically observe the function of the ileocecal valve in patients with ileocecal inflammatory in real time, can be used as an effective method for the evaluation of the function of the ileocecal valve.
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Received: 27 June 2019
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