Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is rotated towards the left and the chin obscures the upper lung apices , bilaterally . Additionally , lung volumes are low leading to crowding of the bronchovascular structures . Within these limitations , there is mild cardiomegaly and central pulmonary vascular congestion . Left retrocardiac streaky opacity likely reflects atelectasis . There is no lobar consolidation , pleural effusion , or pneumothorax .
    OUTPUT:
    
Low lung volumes , mild cardiomegaly , and mild central pulmonary vascular congestion . Left lower lobe atelectasis .