3Chan JH, Tsui EY, Yuen MK ,et al. Gadopentetate dimeglumine as an oral negative gastrointestinal contrast agent for MRCP [ J ]. Abdom Imaging, 2000,25 (4) :405- 408.
4Garcia VR , Garcia VA , Abascal F , et al . Magnetic resonance urography : a pictorial overview [ J ]. Br J Radiol, 2006,79 ( 943 ) : 614- 626.
5Cerwinka WH, Damien GJ, Kirsch AJ. Magnetic resonance urography in pediatric urology [ J ]. J Pediatr Urol,2008,4 ( 1 ) :74-82.
6Weinreb JC, Maravilla KR, Redman HC, et al. Improved MR imaging of the upper abdomen with glucagon and gas. J Comput Assist Tomogr, 1984, 8: 835-838.
7Brown JJ, Duncan JR, Heiken JP, et al. Perfluorodtylbromide as a gastrointestinal contrast agent for MR imaging: use with and without glucagon. Radiology, 1991, 181:455-460.
8Hahn PF,Stark DD,Lewis JM,et al. First clinical trial of a new superparamagnetic irom oxide for use as an oral gastrointestinal contrast agent in MR imaging. Radiology, 1990,175:695-700.
9Hirohashi S, Hirohashi R, Uchida H, et al. MR cholangiopancreatography and MR urography: improved enhancement with a negative oral contrast agent. Radiology, 1997, 203:281-285.
10Papanikolaou N, Karantanas A, Maris T, et al. MR cholangiopancreatography before and after oral blueberry juice administration. J Comput Assist Tomogr, 2000,24:229-234.