Low-contrast dose CT PE

65 yo M, BMI 32, eGFR 45, with shortness of breath after orthopedic surgery,

CT PE done with 50% contrast saline mix, total 32.5 mL Omnipaque 350 used. 45 keV mono-energy oblique axial MIP reconstruction with excellent pulmonary arterial enhancement (>400 HU). Acute PE in right upper lobe.