Added Value of Diffusion-Weighted MR Imaging to Non-Enhanced CT in the Evaluation of Acute Appendicitis
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Article Type:
Research/Original Article (دارای رتبه معتبر)
Abstract:
Background
Although non-enhanced CT (NECT) can be applied for the diagnosis of acute appendicitis in obligatory conditions such as impaired renal function, it is not as effective as contrast-enhanced CT.
Objectives
This prospective study aims to determine the added value of diffusion weighted imaging (DWI) in the diagnosis of acute appendicitis when combined with non-enhanced computed tomography (NECT).
Patients and
Methods
Between June 2014 and January 2017, 94 patients (48 male, 46 female) imaged with NECT and DWI for acute appendicitis were enrolled in this prospective study. DWI was obtained with b factors 0, 500 and 1000 s/mm2, and assessed with visual and quantitative analysis. Results of NECT and DWI, and combined imaging (NECT and DWI) were analyzed by means of sensitivity, specificity and accuracy.
Results
NECT and DWI provided 91.5% - 94.3% sensitivity, 82.6% - 86.9% specificity and 89.3% - 92.5% accuracy, respectively. The combined protocol (NECT and DWI) revealed 98.5% sensitivity, 95.8% specificity and 97.8% accuracy. The addition of DWI to NECT provided a 7%, 13.2% and 8.5% increase in the sensitivity, specificity and accuracy, respectively. This increase was statistically significant (P
Conclusion
DWI is an efficient technique for the diagnosis of acute appendicitis. This even may become more efficient if added to a NECT scan. We recommend using DWI when NECT is inevitable for different reasons. It may increase the diagnostic accuracy of NECT to avoid an additional contrast-enhanced CT scan.
Language:
English
Published:
Iranian Journal of Radiology, Volume:15 Issue: 1, Jan 2018
Page:
5
magiran.com/p1821917  
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