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To explore the construction and application of imaging technician competency. Through literature review, job analysis and behavioral event interview, 410 imaging technicians from 8 cities in Guangdong province were surveyed, and the data obtained were statistically analyzed by SPSS22.0. There were two rounds of questionnaires with effective recovery rates of 96.1% (173/180) and 93% (221/230), respectively. The competency of imaging technicians was constructed by exploratory and confirmative factor analysis, consisting of 17 items, including comprehensive ability, image, values, characteristics and employment motivation of imaging technicians. Cronbach's α coefficient > 0.9, the correlation between the four dimensions and the imaging technician competency model was comprehensive skills (r=0.935, P<0.001), characteristics and employment motivation (r=0.921, P<0.001), image (r=0.706,P<0.001) and values (r=0.769,P < 0.001). The competency evaluation scale of image technicians constructed by factor analysis is scientific and reliable, and with good reliability and validity, it can provide objective evaluation tool for job selection, performance, training and assessment. [ABSTRACT FROM AUTHOR]