Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP portable view of the chest was obtained . The exam is suboptimal due to patient rotation and patient 's chin overlies the right apex . There are low lung volumes that accentuate the bronchovascular markings . Given this , the pulmonary vasculature appears mildly prominent , which could be due to pulmonary vascular congestion . Patchy left base opacity could represent a vascular structure , although an infectious process or aspiration is not excluded . A single - lead left - sided pacer is seen with the distal aspect of the lead not well seen . Cardiac and mediastinal silhouettes are not fully evaluated .
    OUTPUT:
    
Suboptimal study , suggest repeat with better patient positioning if possible . Findings as above .