Four-Year Cumulative Radiation Exposure in Patients Undergoing Computed Tomography Angiography for Suspected Pulmonary Embolism

Table 1

Demographics of subjects.

Demographic data from the original 514 medical records examined
Mean age	50.1±14.0 years
Age range	16–70 years old
Male/female ratio	200/314
Number of PEs identified by pulmonary CTA	40 (7.8%)
Demographic data from 300-subject cohort
Mean age	51.2±13.2 years
Age range	16–70 years old
Male/female ratio	108/182
Mean cumulative radiation dose	31.1±40.5 mSv
Number of PEs identified by pulmonary CTA	19 (6.3%)