Abstract
Retake rate of C1-2 open mouth radiography is high. We try to find out the reasons associated with the retake rate by analyzing the subjective factors of the radiological technologist and the objective factors of the patient's anatomy. A total of 102 patients were collected. The operation experiences of technologists were divided into the young and senior groups. The reference distance, angle, and proportion of the cervical spine lateral image were objective factors. Chi-square test and independent t-test were used to analyze the relationship between subjective factors and retake rate and between objective factors and retake rate, respectively. The average retake rate of the young group was 44.4% with significant statistical relationship (p = 0.036). There was significant statistical relationship between the reference distance and the retake rate (p = 0.033). The retake rate of the young group performing the open mouth projection was significantly higher and the reference distance was significantly correlated.