Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright radiograph of the chest demonstrates the lungs are well expanded with persistent linear opacities in the right upper lobe , unchanged since ___ , likely scarring . The heart is moderately enlarged and unchanged . No pleural effusion , pulmonary edema , or focal consolidation concerning for pneumonia is identified . A 9 mm rounded radiodensity projecting over the right lower lobe is possibly summation artifact or a nipple shadow , although the left is not visualized . should not be confused for a pulmonary nodule .
    OUTPUT:
    
1 . No evidence of pneumonia . Stable moderate cardiomegaly and right upper lobe scarring . 2 . 9 mm radiodensity projecting over the right lower lobe is possibly summation artifact or a nipple shadow rather than a nodule , and could be differentiated with shallow oblique radiographs . The above findings were communicated to Dr . ___ by Dr . ___ ___ telephone at 7 : 40 am , within ___ min of discovery .