Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is linear right upper lobe opacity with associated volume loss with elevation of the minor fissure . The lungs are otherwise grossly clear . There is no effusion or edema . There is no pneumothorax . The cardiomediastinal silhouette is within normal limits . No acute osseous abnormalities .
    OUTPUT:
    
Persistent right upper lobe likely atelectasis . No definite superimposed acute cardiopulmonary process . Please note that follow - up chest CT should be performed in ___ months time as previously recommended . This is to evaluate for interval change of subtle opacities on prior chest CT and for cause of persistent underlying right upper lobe atelectasis .