Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Low lung volumes cause bronchovascular crowding . Bibasilar scarring or atelectasis is unchanged from multiple prior studies . The cardiomediastinal silhouette including mild cardiomegaly is unchanged . There is no focal consolidation pleural effusion , pulmonary edema , or pneumothorax . There is diffuse demineralization . Compression deformities of midthoracic vertebrae are unchanged .
    OUTPUT:
    
Stable appearance of the chest including low lung volumes and bibasilar atelectasis or scarring . No definite focal consolidation or pulmonary edema .