How do radiologists do it? The influence of experience and training on searching for chest nodules.

摘要: Four observer groups with different levels of expertise were tested to investigate the nature expert performance. The task was detection and localisation significant pulmonary nodules in postero-anterior views chest. One hundred twenty digitised chest images used. 8 experienced radiologists, 5 radiographers before after six months training image interpretation, undergraduate radiography students. Eye tracking carried out differences visual search strategies between observers. Detection performance measured an Alternate Free Response Operating Characteristic technique. Performance measures showed group radiologists plus better at than remainder (t-test p = 0.046). Differences shown eye-tracking parameters groups: saccadic amplitude (ANOVA 0.00047), number fixations 0.041), scrutiny time per decision film for versus inexperienced observers 0.02). Visual coverage reduced increasing level experience but this result did not reach significance. Generally there distinct we discuss significance these findings. We believe results support some recent theoretical models that findings may prove be helpful ‘fast-track’ educational programmes interpretation non-radiology practitioners.