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{{Authors|author1=[[User:Mikael Häggström|Mikael Häggström]]|author2=}}Projectional radiography ("X-ray") with peroral intake of barium can determine whether a bowel obstruction is partial or incomplete, and may give clues to the cause.<ref name="pmid12131079">{{cite journal| author=Thompson JS| title=Contrast radiography and intestinal obstruction. | journal=Ann Surg | year= 2002 | volume= 236 | issue= 1 | pages= 7-8 | pmid=12131079 | doi= | pmc=1422542 | url=https://www.ncbi.nlm.nih.gov/entrez/eutils/elink.fcgi?dbfrom=pubmed&tool=sumsearch.org/cite&retmode=ref&cmd=prlinks&id=12131079 }} </ref>