الفهرس 
IntroductionOnly 14 pages are availabe for public view
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Abstract
In our study, DW-MRI was performed on all subjects at b-values of 500 and 1000 s/mm2. Mean ADC values of pancreatic masses were measured for each b-value.
Diffusion-weighted imaging is helpful in identifying malignant masses with dense cellularity, demonstrating lower ADC values compared with those of benign masses. ADC value calculation is a promising method that provides quantitative information in differentiation of malignant pancreatic masses from benign ones.
Benign pancreatic masses as pancreatic pseudocyst, simple cyst and abscess show low signal intensities on DWI with high ADC value, however malignant pancreatic masses as adenocarcinoma, lymphoma and metastasis show high signal intensities on DWI with low ADC value with a cut-off value of 1.5 x10-3 s/mm2 for the differentiation of benign from malignant pancreatic masses by b-value 1000 s/mm2 with the sensitivity, specificity, PPV, NPV& p value were 100%, 83.33%, 100%, 93.33%, and <0.001 respectively.
There is statistical significant difference between mean ADC values of benign and malignant pancreatic masses. The mean ADC values of benign and malignant masses done by b-value 1000 s/mm2 are statistically significant higher than done by b-value 500 s/mm2.