Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Obscuration of the right heart border is likely caused by mild pectus excavatum deformity . The lungs are clear otherwise . No retrocardiac opacities are present . There is no cardiomegaly . The aortic contour is unremarkable . There is no pleural effusion or pneumothorax . Mild mid thoracic dextroscoliosis .
    OUTPUT:
    
No acute cardiopulmonary process .