Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Aortic knob is calcified . There appears to be mild pulmonary vascular congestion . Additionally , ill - defined airspace opacities are noted in both lung bases , concerning for infection or aspiration . Blunting of the costophrenic angles bilaterally is compatible with small pleural effusions . There is no pneumothorax . Multilevel degenerative changes are noted in the thoracic spine .
    OUTPUT:
    
Bibasilar airspace opacities concerning for infection or aspiration , as seen on the prior CT torso . Small bilateral pleural effusions are new , with likely mild pulmonary vascular congestion .