Abdomen, Biliary Tract / Gallbladder, Radiographers, MR-Cholangiography, Contrast agent-oral, Artifacts, Obstruction / Occlusion
W. Gilani, M. J. Lahaye, C. de Graaf, A. te Boekhorst, R. G. H. Beets-Tan
Methods and materials
For this study ten healthy volunteers were included. The age of the volunteers was between 20-70 years to mimick population variation. All volunteers recieved two MRIs. Patients were asked to fast for 4 hours prior to the MR examination. The first MR-examination was performed without the use of any oral preparation.
For the second MRI the test subjects were asked to drink three glasses (3x150ml) of pineapple juice in 20 minutes before the examination and one glass (1x150ml) just before starting the examination.
The same MR protocol was used for both scans. The MR protocol consists of MRCP sequence, DWI and T2 weighted sequence. To reduce motion artefacts the following techniques were used: MRCP with respiratory triggering, DWI with single shot technique and the T2 with a multivane technique.
One radiologist evaluated quality of all images blinded for the type of oral preparation on five-point-scale. The scale was arranged from very poor to excellent image quality. Image quality of each MRI sequence (MRCP sequence, DWI and the T2 weighted sequence) was scored.
In addition, the overall image quality of the whole MRI examination was scored.