Oolong tea drink as an alternative to oral negative contrast media in magnetic resonance cholangio pancreatography (MRCP)

High signal intensity of the gastrointestinal system can disrupt the optimization of MRCP image quality. Research on the use of natural oral contrast media of MRCP has been widely used, but contrast media material is difficult to obtain in the developing country market such as Indonesia

Based on Atomic Absorption Spectrometry (AAS) test the manganese content of oolong tea brand packaged is 0.9 mg larger than other packaged tea products. Therefore this study aims to evaluate oolong tea packaged as an alternative to oral MRCP contrast medium and to determine the best start scanning time settings. The subjects of the study were 28 healthy respondents, consisting of one control group and three treatment groups. The treatment group was given a 400 ml oolong tea package then 3D MRCP thick slab axial HASTE scanning was performed after 5 minutes (treatment 1), 15 minutes (treatment 2) and 25 minutes (treatment 3). The MRCP image assessment uses grading based on contrast and image effects.

The results showed that there was a difference of MRCP image on the enhancement of contrast and image effect. The stomach and duodenum can be compressed into hypointense as well as the visualization of the choledochal, and the hepatic ducts appear more clearly at the start of a 15-minute scanning and 25-minute post contrast. visualization of the ampulla, pancreatic ducts, and intra-hepatic ducts showed no difference between pre and post contrast.

Oolong tea in a form of a ready-to-drink package is as effective as other negative contrast media when used in Magnetic Resonance Cholangio Pancreatography (MRCP).