Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest demonstrate slightly lower lung volumes than on the prior study . Increased interstitial marking are potentially due to lower volumes and possible vascular congestion . No focal opacity is seen . There is also blunting of the right costophrenic angle , with possible trace pleural effusion . The heart size is moderately enlarged , but stable , with a tortuous aorta . No pneumothorax is seen and there is no evidence of pneumonia .
    OUTPUT:
    
Possible trace right pleural effusion . Otherwise , no acute cardiopulmonary disease .