Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Mild bibasilar atelectasis is noted without convincing evidence for pneumonia or edema . No large effusion or pneumothorax is seen . Cardiomediastinal silhouette appears stable . Severe degenerative changes in the lumbar spine noted with dextroscoliosis . Degenerative changes also noted at both shoulders .
    OUTPUT:
    
Bibasilar atelectasis . No convincing evidence for pneumonia .