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©2013 UpToDate ® Print Email Adult abdominal and pelvic effective doses Procedure Modality Average effective dose (mSv) Number of chest x-rays (PA/lateral) with equivalent radiation dose* Pelvic radiograph Conventional radiography 0.6 6 Abdominal radiograph Conventional radiography 0.7 7 Intravenous pyelogram Conventional radiography 2.5 25 Renogram Nuclear medicine 2.6 26 HIDA scan Nuclear medicine 3.1 31 ERCP Conventional fluoroscopy or interventional radiology 4 40 Small bowel follow through Conventional fluoroscopy or interventional radiology 5 50 Upper gastrointestinal series Conventional fluoroscopy or interventional radiology 6 60 CT pelvis Computed tomography 6 60 GI bleeding study Nuclear medicine 7.8 78 Barium enema Conventional fluoroscopy or interventional radiology 8 80 CT abdomen Computed tomography 8 80 Abdominal angiogram Conventional fluoroscopy or interventional radiology 12 120 Whole body PET Nuclear medicine 14.1 141 CT triphasic liver Computed tomography 15 150 CT angiogram aorta Computed tomography 24 240 ERCP: endoscopic retrograde cholangiopancreatography; HIDA: hepatobiliary aminodiacetic acid; PET: positron-emission tomography. * PA and lateral chest radiograph = .1 mSv. Data from: Mettler, FA, Huda, W, Yoshizumi, TT, Mahesh, M. Effective doses in radiology and diagnostic nuclear medicine: a catalog. Radiology 2008; 248:254. Smith-Bindman, R, Lipson, J, Marcus, R, et al. Radiation dose associated with common computed tomography examinations and the associated lifetime attributable risk of cancer. Arch Intern Med 2009; 169:2078. Shrimpton, PC, Hillier, MC, Lewis, MA, Dunn, M. National survey of doses from CT in the UK: 2003. Br J Radiol 2006; 79:968.