Objective: To identify the magnitude and causes of radiological errors as perceived by resident and consultant clinicians in the University of Science and Technology (UST)Hospital, Sana’a -Yemen. Methods: A questionnaire-based survey was used to assess the magnitude and causes of radiological errors. It was distributed among all clinicians in UST Hospital. Results: Of 40 residents and consultants from the UST Hospital invited to participate in the present study, 52.5%agreed to join the study. Of them, 81.0% reported the notice of diagnostic radiological errors during their daily practice,wherethe majority of daily noticed errors (64.7%) were in the range of1–10 diagnostic errors. More than half of radiological errors were reported in the ...