Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Low lung volumes result in bronchovascular crowding . There is no focal consolidation , pleural effusion or pneumothorax . Heart size is normal . Mediastinal silhouette and hilar contours are normal . A ___- mm opacity projecting over the right lower lung is unchanged from ___ and likely represents a nipple shadow . Compression deformity in the mid thoracic spine is unchanged .
    OUTPUT:
    
No pneumonia , edema , or effusion .