a test that uses x-ray examination to view the large intestine; there are two types of this test: the single-contrast technique where barium sulfate is injected into the rectum in order to gain a profile view of the large intestine; and the double-contrast (or "air contrast") technique where air is inserted into the rectum, jämesoole röntgenuuring päraku kaudu soolde viidud baariumkontrastaine abil (lihtkontrasteerimisega) või baariumkontrastaine ja õhu abil (kaksikkontrasteerimisega); kontrastainena kasutatakse baariumsulfaati