Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . On the lateral view , there is a somewhat nodular opacity projecting over mid thoracic vertebral body . There is no definite corresponding abnormality on the frontal view . The lungs otherwise appear clear . There is mild cardiomegaly . There is tortuosity of the descending thoracic aorta . No acute osseous abnormality is identified .
    OUTPUT:
    
Vague rounded opacity projecting over a mid thoracic vertebral body , the location of this is uncertain , potentially within the bone or overlying lung parenchyma . Non-urgent low - dose chest CT suggested for further characterization .