Slide 2: Ground glass opacity lung is denser (whiter) than normal lung, but as compared to consolidation, not dense enough to obscure vessels within the area of GGO.
Slide 3: Most often, GGOs are caused by partial replacement of air within the alveoli with something that does not normally belong there. Many things can fill alveoli so the finding is non-specific. History, physical exam and other findings are key!
Slide 4: In this case the patient had a pulmonary embolism and the GGO was caused by blood partially filling the alveoli.
Tags: ct, ground glass opacity, lung, lungs, pulmonology, radiologist, radiology, reading room, xray