Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph from ___ , lung volumes remain low . There has been interval improvement of a linear opacity at the right minor fissure . However , bilateral perihilar opacities with indistinct pulmonary vascular markings persist . Blunting of bilateral costophrenic angles could be related to pleural fluid . The cardiac silhouette remains enlarged . There is no pneumothorax .
    OUTPUT:
    
Persistent bilateral perihilar opacities and indistinct pulmonary vascular markings suggestive of congestive heart failure . In the appropriate clinical setting , superimposed infection can not be excluded . Recommend short interval followup after treatment to document resolution .