Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate an unchanged cardiomediastinal silhouette . Mediastinal and subcutaneous emphysema is persistent but slightly decreased . There is bibasilar atelectasis , slightly increased on the right and unchanged on the left . Bilateral pleural effusions , right greater than left , are also unchanged . A left apical pneumothorax is minimal , if any .
    OUTPUT:
    
1 . Minimal left apical pneumothorax , if any . 2 . Persistent but slightly decreased mediastinal and subcutaneous emphysema . 3 . Bibasilar atelectasis , slightly increased on the right and unchanged on the left . 4 . Unchanged bilateral pleural effusions , right greater than left . These findings were discussed via telephone by Dr . ___ with Dr . ___ ___ at ___ on ___ .