Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The exam is severely limited by the patient 's body habitus . The right costophrenic sulcus on anterior view and posterior costophrenic sulci on later view are not imaged . Within the limits of this study , the lungs appear well expanded . A linear opacity in the left mid lung is unchanged , likely scarring / chronic atelectasis . Interstitial markings are exaggerated due to overlying soft tissue , however there are no definite focal opacities to suggest pneumonia . The cardiomediastinal silhouette and hilar contours are unchanged . The heart size is exaggerated on the AP view . There is no large pleural effusion or pneumothorax .
    OUTPUT:
    
Study limited by body habitus and an incompletely imaged costophrenic sulci , however there is no evidence of acute cardiopulmonary process .