Objective To assess the effect of low dose computed tomography pulmonary angiography (CTPA) on radiation dose in pregnant patients. Materials and methods An old CTPA protocol for pregnant patients was compared to a new protocol. Protocol changes included: decreased kVp; increased contrast injection rate; imaging after shallow inspiration. Patients undergoing CTPA before (phase 1 group) or after (phase 2 group) the protocol change, were assessed. Results Effective dose was lower in the phase 2 group (0.95 v 1.66 mSv; p < 0.001). Quantitative noise was lower in the phase 1 group (p < 0.001). Conclusion Low dose CTPA tailored for pregnancy reduces dose in pregnant patients.
- Computed tomography
- Image quality
- Pulmonary angiography
ASJC Scopus subject areas
- Radiology Nuclear Medicine and imaging