Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . There is mild linear atelectasis at the left lung base . The upper lungs are clear . Bilateral pleural effusions are small , if any . No pneumothorax is present .
    OUTPUT:
    
Bilateral pleural effusions are small , if any , and there is minimal left base linear atelectasis .