Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Evaluation is limited due to underpenetration of the film . Compared to the prior radiograph , mild cardiomegaly is unchanged . No evidence of focal consolidation , pleural effusion , or pneumothorax . Unchanged appearance of the known thoracic the lumbar spinal hardware .
    OUTPUT:
    
Limited evaluation due to under penetration of the film . Within this limitation , no acute cardiopulmonary process .