On the left another patient with ground glass pattern in a mosaic distribution. Again the ground glass appearance is the result of hyperperfused lung with large vessels adjacent to oligemic lung with small vessels due to chronic thromboembolic disease. Emboli adherent to the wall and intravascular septa are typical for chronic thromboemboli in which partial recanalization took place. #Clinical #Radiology #CTChest #GGO #Mosaic #Thromboembolism #RadiologyAssistant