Comparison of Diagnostic Quality and Radiation Dose between Test Bolus and Bolus Tracking protocols for Computed Tomography Pulmonary Angiography (CTPA) among Pregnant Women in Two Tertiary Centres

Introduction: Computed Tomography Pulmonary Angiography (CTPA) among pregnant women is often non-diagnostic and may need the repetition of CTPA. This study aims to compare test bolus tracking protocols for CTPA by analysing mean contrast enhancement pulmonary artery, diagnostic quality radiation dosage, as well outcome repeated due initial Methods: retrospective from two tertiary centres included who underwent using protocols. quality, artery dose length product (DLP) were collected compared between both The frequency suboptimal analysed. Results: Test protocol yields a slightly higher number qualities than protocol; however not statistically significant. had significantly better acceptable protocol. lower DLP, 220 mGy.cm ± 69, protocol, 323 34, p-value <0.001. Half did show on repetition. Conclusion: No significant difference in women, but overall with dose. Repetition studies poor always benefit. Hence, we advise weighing risk benefits