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Pulmonary CT angiography as first-line imaging for PE: image quality and radiation dose considerations
1Department of Radiology, Vancouver General Hospital, 899 West 12th Ave, Radiology Admin, Jim Pattison Pavilion South, Vancouver, BC V5Z 1M9, Canada. john.mayo@vch.ca
Objective:
This article reviews dose reduction techniques in pulmonary CT angiography (CTA) for imaging pulmonary embolism (PE). Dose reduction technologies covered include tube current modulation, kilovoltage modulation, scanning length modification, dynamic z-axis collimation, iterative reconstruction, and dual-energy CT. Age- and weight-specific imaging techniques are suggested.
Conclusion:
Pulmonary CTA plays a vital role in imaging PE. Using dose reduction technologies can provide high-quality diagnostic imaging with a significant reduction in patient dose.
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