Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is little interval change from the prior study . The heart size is within normal limits . The aorta remains markedly tortuous . Superior mediastinum remains widened , which on the prior chest CT from ___ is attributable to mediastinal fat and vessels . Pulmonary vascularity is not engorged . There is subsegmental atelectasis in the left lung base . Mild elevation of left hemidiaphragm appears unchanged . No pleural effusion or pneumothorax is present . No areas of focal consolidation are demonstrated . There are no acutely displaced rib fractures visualized .
    OUTPUT:
    
No significant interval change from the prior study . No acute intrathoracic process demonstrated .