Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The study is somewhat limited as the patient 's chin projects over and obscures the lung apices . Lung volumes are slightly reduced . The heart size remains mildly enlarged . The aorta is unfolded . The mediastinal and hilar contours are otherwise unchanged . There is no pulmonary vascular congestion . Minimal patchy opacity in the left lung base likely reflects atelectasis . No pleural effusion , focal consolidation or large pneumothorax is identified . Clips from prior thyroidectomy are noted within the neck .
    OUTPUT:
    
Slightly limited exam . Left basilar atelectasis . No evidence for pulmonary edema .