Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Mild linear opacities in the lung bases correspond with areas of subsegmental atelectasis on concurrent chest CT . Otherwise , the lungs are clear . There is no pneumothorax . No vascular congestion , edema or pleural effusions are evident . Cardiomediastinal and hilar contours are within normal limits .
    OUTPUT:
    
No acute cardiopulmonary process .