Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Exam is limited by patient positioning as well as the patient 's chin and neck obscuring the lung apices . Low lung volumes are present . Heart size is moderately enlarged . Atherosclerotic calcifications are noted at the aortic knob . Mediastinal contours are unremarkable . Crowding of bronchovascular structures is present with possible mild pulmonary vascular congestion . Small left pleural effusion is likely present . Patchy bibasilar opacities may reflect atelectasis . No large pneumothorax is present . There are hypertrophic changes noted in the thoracic spine .
    OUTPUT:
    
Low lung volumes with probable bibasilar atelectasis . Infection at the lung bases can not be excluded in the correct clinical setting . Mild pulmonary vascular congestion and trace left pleural effusion .