Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Linear left greater than right basilar opacity is likely related to atelectasis . There are no new focal opacities concerning for pneumonia . There are no pleural effusions or pneumothorax . The cardiomediastinal and hilar contours are stable . Dual - chamber pacemaker leads are in standard positions within the right atrium and right ventricle . There is a tortuous , elongated thoracic aorta . There is mild cardiomegaly .
    OUTPUT:
    
No acute cardiopulmonary process .