Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single frontal view of the chest . When compared to prior , there has been interval resolution of the opacities seen on the prior chest x-ray . Vague opacity persists at the left lung base , projecting over the anterior left sixth rib thought to be costochondral calcification and is unchanged when dating back to ___ . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Previously seen regions of consolidation have essentially resolved . No evidence of acute cardiopulmonary process .