Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are low . Widened appearance of the superior mediastinum may be related to low lung volumes . There is no focal consolidation , pneumothorax , or pleural effusion . There is mild cardiomegaly , however this may be exaggerated due to technique and low lung volumes .
    OUTPUT:
    
1 . No evidence of pneumonia . 2 . Widened mediastinum which may be secondary to low lung volumes and repeat PA and lateral views with improved inspiration may be helpful for further assessment .