Observer error in liver scans.
D001706:Biopsy; D003951:Diagnostic Errors; D006801:Humans; D008099:Liver / Q000473:pathology; D008107:Liver Diseases / Q000175:diagnosis*; D008113:Liver Neoplasms / Q000175:diagnosis; D008722:Methods; D011786:Quality Control; D011877:Radionuclide Imaging