Indirect Computed Tomography Venography of the Lower Extremities Using Single-Source Dual-Energy Computed Tomography: Advantage of Low-Kiloelectron Volt Monochromatic Images

Optimal image quality with substantially higher venous attenuation is provided by 50-keV monochromatic images from dual-energy CT venography acquisition compared with 70-keV images. The 50-keV monochromatic images increase the confidence in the image interpretation of DVT and decrease the number of indeterminate studies.