Objective To investigate the influence of individual factors on pulmonary artery peak time in patients with suspected pulmonary embolism.Methods Gender， age， height， weight， heart rate， systolic and diastolic blood pressure were collected from patients with suspected pulmonary artery embolism within 30 minutes prior to the examination， and the pulmonary artery peak time was measured at the level of the tracheal bifurcation by test-bolus method， and the correlation between individual factors and peak time in patients with suspected pulmonary artery embolism was statistically analyzed using SPSS 23 software.Results The median pulmonary artery peak time in 153 patients with suspected pulmonary embolism was 9.07 s. The pulmonary artery peak time was significantly different from patient gender (P<0.05)， height (P<0.05)， and weight (P<0.05) but not from age (P>0.05)， heart rate (P>0.05)， diastolic blood pressure (P>0.05)， and systolic blood pressure (P>0.05).Conclusion The main factors influencing the pulmonary artery peak time of patients with suspected pulmonary embolism were gender， height and weight， and this result will be useful in guiding clinical precision and individualized scanning of pulmonary CTA imaging in patients with suspected pulmonary embolism.