RESUMO
Objective To evaluate the images of MRCP acquired by adjusting 0.3 Tesla MR unit heavy T 2-weighted scanning parameters and altering scanning angle and diagnostic correctivity to biliary obstructive disease.Methods Routine MR T 1WI,T 2WI scanning were performed axial in 50 cases of patients with biliary obstruction.All of them were divided into two groups,20 cases of them were scanned coronal with FSE T 2-weighted fixed parameters,30 cases of them were scanned with altering scanning angle,increasing scanning slices,decreasing distance of two near slices,reducing signal collection times(NSA),shortening scanning time.Results The acquired images through adjusting FSE T 2-weighted scanning parameters were visualized clearly.The boundary of cholangiopancreatie ducts were showed clearly.The display rate of biliary and pancreatie ducts was elevaled from 20% to 83.3%.The accuracy of it for evaluating the causes of obstruction was increased from 88.9% to 93.3%.The accuracy of it in the detection of the location of bile duct obstruction was 100%.Conclusion Through adjusting scanning purameters low field MRCP is very helpful in improved images quality and reflecting veliable signs of biliary and pancreatie duct obstruction disease combined with MRI T 1-weighted T 2-weighted message.This method can increased the diagnostic accuracy of the causes of obseruction and supply the reliable ground for clinical treatment.
