His greatest interest has been in the radiology of diseases of the small intestine, and he is currently contributing to the evaluation of small bowel imaging with MR. He has been awarded honorary membership of the Radiological Society of North America, the British Institute of Radiology, the French Society of Radiology, the Radiological Society of Switzerland, the Austrian Society of Radiology, the Italian Society of Medical Radiology, the Royal Belgian Radiological Society, the Argentinean Society of Radiology, the Bulgarian Association of Radiology, the Association of Bosnia and Herzegovina Radiologists, the Turkish Radiological Society, the Hungarian Society of Radiology, the Nordic Radiological Society, the Swedish Society of Radiology and the Polish Society of Medical Radiology.