Image quality and radiation exposure at pulmonary CT angiography with 100- or 120-kVp protocol: prospective randomized study.

Purpose: To prospectively compare 16-section multidetector computed tomography (CT) at 100 and 120 kVp for image quality and radiation dose.

Materials And Methods: The study had institutional review board approval; written informed consent was obtained. Sixty patients were referred for evaluation of suspected pulmonary embolism with CT angiography.