Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear atelectasis is noted at the left lung base . Otherwise , lungs appear grossly clear without lobar consolidation , pleural effusion , pneumothorax , or pulmonary edema . Moderate cardiomegaly is unchanged from prior examination . Calcifications are seen at the aortic arch . There is no evidence of free subdiaphragmatic air .
    OUTPUT:
    
Moderate cardiomegaly and left basilar atelectasis .