Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomediastinal silhouette is within normal limits . New faint right basilar opacity may represent atelectasis , although superimposed infection is not excluded in this clinical setting . No pneumothorax or pleural effusions detected .
    OUTPUT:
    
Since ___ , new faint right basilar opacity may represent atelectasis , but superimposed infection is also considered , given the patient 's symptoms .