Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest demonstrate low lung volumes . Diffuse interstitial abnormality worst at the lung bases and periphery persists . There are increased interstitial markings compared to the ___ exam , suggestive of superimposed volume overload . Small bilateral pleural effusions are also new since prior . Heart size has mildly increased . Pulmonary artery remains prominent , suggestive of possible underlying pulmonary hypertension . Aortic arch calcifications are again noted . There is no pneumothorax . Mediastinal silhouettes are unchanged . Degenerative joint changes of the thoracic spine are unchanged .
    OUTPUT:
    
In comparison to ___ exam , diffuse interstitial abnormalities have progressed with interval development of small pleural effusions and mild enlargement of the cardiac size . The above findings most likely reflect worsening pulmonary edema superimposed on chronic interstitial lung disease .