Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest . Lungs are clear . Vague increased opacity at the left lung base only on the frontal view only is likely due to overlying soft tissues and confluence of shadows . There is no effusion or pulmonary vascular congestion . Cardiomediastinal silhouette is unchanged . No acute osseous abnormality is identified . Lower thoracic vertebroplasty changes are again seen .
    OUTPUT:
    
No acute cardiopulmonary process .