Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . There is mild indistinctness of the pulmonary vascular markings , new since prior . Blunting of the right posterior costophrenic angle raises possibility of small effusion , decreased since prior . Cardiomediastinal silhouette is difficult to assess given overlying the right chest wall pacing device which partially obscures the silhouette . Prosthetic aortic valve is seen as well as median sternotomy wires . Bones are diffusely osteopenic . No definite acute osseous abnormality detected . Degenerative changes noted at the shoulders bilaterally . Severe lower thoracic upper lumbar levoscoliosis is seen .
    OUTPUT:
    
Mild pulmonary vascular congestion with improved bilateral effusions since ___ with trace effusion likely persisting on the right .