Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The lung volumes are low . There is lleft basilar atelectasis with mild volume loss and elevation of the left hemidiaphragm , increased since the prior exam . There is no focal consolidation to suggest pneumonia . There is no pulmonary edema , pleural effusion , or pneumothorax . The cardiomediastinal silhouette is unchanged with persistent unfolding and tortuosity of the aorta and mild cardiomegaly . Moderate degenerative changes in the thoracic spine with mild compression deformities appear unchanged . Evaluation is limited due to osteopenia .
    OUTPUT:
    
Low lung volumes and left basilar atelectasis . No evidence of pneumonia or other acute process .