Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Previously noted PICC line has been removed . The heart remains mildly enlarged . There is minimal retrocardiac linear density which may represent mild scarring or atelectasis . No focal consolidation concerning for pneumonia . No effusion or pneumothorax . Mediastinal contour appears normal . Bony structures are intact . No free air below the right hemidiaphragm is seen .
    OUTPUT:
    
Mild cardiomegaly unchanged without superimposed acute process . Mild retrocardiac atelectasis / scarring .