Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: 2 views were obtained of the chest . Left upper lobe opacification with accompanying volume loss and resultant leftward shift of the mediastinum is noted and suggestive of lingular or segmental left upper lobe collapse . The right lung is comparable a well - aerated . There is no pleural effusion or pneumothorax . The heart size appears normal though obscured by this opacity .
    OUTPUT:
    
Lingular or segmental left upper lobe collapse / atelectasis . Consider mucous plugging or other cause of airway obstruction . Consider repeat imaging after vigorous coughing or suctioning depending on the patient 's clinical circumstance to see if this resolves .