Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Vague opacity at the right lung base is seen and projects over the hemidiaphragm on the frontal view . It is not clearly identified on the lateral view . Linear opacity is seen in the left mid lung suggestive of atelectasis . Elsewhere , the lungs are clear . There is no effusion or pulmonary vascular congestion . Cardiomediastinal silhouette is stable . Atherosclerotic calcifications noted at the arch . No acute osseous abnormality is detected .
    OUTPUT:
    
Hazy right basilar opacity at the right lung base , unchanged from prior , potentially atelectasis ; however , infection is not totally excluded . No new region of consolidation or evidence of failure .