Wielopolski, D.R.

imaging image patient fluid volume pulse acquisition signal liver number breath-hold technique section p.a.w pancreatic in-plane echo time echo-planar hepatic readout in-plane phase-encoding direction 90 rf excitation projection 180 rf pulses intensity sequence resolution refocusing phase-encoding breath radiology repetition time k space pancreatic duct volume-rendered images study imaging time system in-plane resolution signal loss image quality echo-planar imaging bile duct center figure artifact intensity projection image region spacing result ratio excitation cerebrospinal fluid direction examination quality ghosting increase background mrcp sequence volume-rendered breath-hold 3 19.8 msec suppression recovery second pancreatitis gradient subject half-fourier gallbladder heat power deposition duct anatomy mr cholangiopancreatography section-select magnetization recovery period repetition wielopolski interest background noise