Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided demonstrate no focal consolidation , effusion , or pneumothorax . No free air below the right hemidiaphragm . Cardiomediastinal silhouette is normal . Bony structures are intact . An oblong hyperdensity in the right lower lung appears to follow the margins of a right anterior low rib and is therefore likely a bone island . A well - corticated lucency through the right distal clavicle likely reflects an old fracture , which is ununited .
    OUTPUT:
    
No acute intrathoracic process . No signs of free air below the right hemidiaphragm .