Objective    To compare the clinical value of 2 oral contrast agents for magnetic resonance cholangiopancreatography (MRCP) and to investigate the safety

potency ratio of negative gastrointestinal contrast agents and to improve MRCP image quality.     Methods    Before MRCP

30 patients took oral ferric ammonium citrate (FAC) solution as group A and another 30 patients took Gd-DTPA dilution as group B. Then all patients underwent MRCP with T

2

-haste-fs-thick-slab sequence. Image assessment was done before and after oral taking of negative gastrointestinal contrast agents.     Results    After oral taking of negative gastrointesti

nal contrast agents

the interference of liquid in stomach and duodenum was suppressed and even effectively eliminated on MRCP. MRCP image quality was improved. Though the display of bile duct and pancreatic duct was of less image artifact

it reached the quality for diagnosis. No significant difference of MRCP image quality was found between those took FAC solution or Gd-DTPA solution.     Conclusion    FAC and Gd-DTPA both are effective negative gastrointestinal contrast agents. Gd-DTPA solution is of better function and higher quality-price ratio.