INTRODUCTION: Endoscopic ultrasonography (EUS) quantitative elastography methods are developed for non-invasive differentiation of pancreatic masses. AIMS: First: To evaluate the diagnostic value of strain ratio (SR) and hue histogram (HH) in @entity1 with pancreatic masses and to determine the cut-off value between @entity788 and focal @entity788 using a pancreatic tissue close to the mass as a reference area. Second: To calculate new variable HH ratio (HHR) in an attempt to improve sensitivity, specificity and accuracy of the method. METHODS: In a prospective single center study, 149 @entity1 were examined: 105 with the pancreatic masses and 44 controls using Pentax EUS linear probes in combination with Hitachi platforms. SR and HH were automatically calculated by machine software. Finally, two groups were formed: @entity788 group (58 @entity1 ) and focal @entity788 group (47 @entity1 ). All statistical analysis has been made in SPSS 14.0 (SPSS Inc., Chicago, USA). CONCLUSION: Statistical analysis in our study showed that SR with a cut-off value of 7.59 reaches 100% sensitivity and 95% specificity with overall accuracy of 97% (confidence intervals [CI]: 92-97%) in detection of @entity788 . Statistical analysis also showed that HH with a cut-off value of >= 86 reaches 100% sensitivity and just 45% specificity with overall accuracy of 66% (CI: 61-66%) in detection of @entity788 . New variable HHR with cut-off >= 1.153 was slightly better with 98% sensitivity and 50% specificity, with overall accuracy of 69% (CI: 63-70%). SR showed significantly higher specificity compared with HH and HHR. More HH studies on Hitachi platforms are needed.

Comparison of elastography methods in XXXX with pancreatic masses.

@entity1 :: ('9606', 'Species') :: ['patients'] @entity788 :: ('MESH:D010190', 'Disease') :: ['pancreatitis', 'Pancreatic cancer', 'pancreatic cancer']
@entity1 :: (9606,Species) :: ['patients']
