Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single portable view of the chest is compared to previous exam from ___ . Extremely low lung volumes are seen on the current examwith secondary crowding of the bronchovascular markings . There is no large effusion . Cardiac silhouette is stable in configuration . Left chest wall pacing device seen with leads unchanged in position . Right PICC is no longer seen . Proximal left humeral orthopedic hardware is partially visualized .
    OUTPUT:
    
Limited exam due to portable technique and poor inspiratory effort without definite acute cardiopulmonary process .