Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart size is top - normal . The hilar and mediastinal contours are within normal limits . Previously seen left upper lobe and upper mediastinal opacities from the ___ are no longer visualized , likely reflecting resolved atelectasis and improved inspiratory effort . There is no pneumothorax , focal consolidation , or pleural effusion .
    OUTPUT:
    
No acute intrathoracic process . Prior combination of atelectasis and vascular congestion along the left upper lobe has resolved since the ___ examination .