Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate clear lungs without pleural effusion or pneumothorax . Previously described right upper lobe opacity has improved . The cardiac silhouette remains top normal in size , the mediastinal contours are normal . A rim-calcified mass is superimposed on the liver and measures 7 .5 x 3 .3 cm , unchanged from ___ and partially imaged in ___ .
    OUTPUT:
    
1 . No acute chest abnormality . 2 . Rim-calcified mass superimposed upon the liver for which further evaluation with cross - sectional imaging is recommended .