Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable upright chest radiograph was provided . Opacity projecting over the right lower lung likely represents a breast implant as seen on prior . There is no evidence of pneumonia or CHF . No large effusion or pneumothorax . Cardiomediastinal silhouette appears unremarkable , though the patient 's rotation limits evaluation of the mediastinum . Bony structures are intact .
    OUTPUT:
    
No acute findings in the chest .