Now Blackberry Fruit can be used as an oral MRI contrast

In an Article "Blackberry (Rubus spp.): a pH-dependent oral contrast medium for gastrointestinal tract images by magnetic resonance imaging." in Magn Reson Imaging 2006 Feb;24(2):195-200. Epub 2005 Dec 27. by Espinosa MG et al,

"They studied seven fruits have been tested on their magnetic properties, paramagnetic metal content and contrast enhancement in magnetic resonance imaging (MRI) of phantom and in vivo. Magnetic susceptibility was determined for the fruit pulps, as well as the contents of paramagnetic metals; iron, manganese and copper. They concluded blackberry (Rubus spp.) contrast enhancement was the highest among the fruits in T(1)-weighted images. Furthermore, this fruit's contrast enhancement shows to be pH-dependent. These characteristics and the wide availability of the Rubus spp. suggest that it should be implemented as an oral contrast agent in images by MR to assess the function of the gastric section of the GI tract. Furthermore, it has the advantage of being a natural meal, so that it can be well tolerated by the patients and use as much as it is needed without side effects."