Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Linear opacities at the lung bases bilaterally most likely due to atelectasis . There is mild blunting of the posterior costophrenic angles which could be due to trace effusions . The lungs are otherwise clear of focal consolidation . Cardiomegaly is unchanged . Left chest wall dual - lead pacing device seen with leads in stable position . Degenerative changes seen at the shoulders . No acute osseous abnormality is detected .
    OUTPUT:
    
Cardiomegaly and trace effusions without acute cardiopulmonary process .