Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The patient is status post coronary artery bypass graft surgery . The cardiac , mediastinal and hilar contours appear unchanged . The heart is again mild - to - moderately enlarged , but appears decreased in size . Streaky opacity at the left lung base suggests minor atelectasis . A right - sided pleural effusion has resolved . A convex opacity appears to refer to the posterior right costophrenic sulcus and suggests a small residual subpulmonic effusion , possibly loculated and likely with associated atelectasis . There is no evidence for pulmonary edema . The bones appear demineralized .
    OUTPUT:
    
Mostly resolved pleural effusion on the right , although with residual opacity probably localizing to the posterior right lower lobe , where there may be a residual pleural effusion .