Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . Port - A - Cath resides over the right chest wall with catheter tip in the region of the right atrium . Midline sternotomy wires and prosthetic cardiac valve are again seen . Lung volumes are low limiting evaluation . A similar overall pattern is seen compared with multiple prior imaging studies with prominent bronchovascular markings which in the setting of low lung volumes likely reflect bronchovascular crowding . The possibility of mild pulmonary vascular congestion is difficult to exclude in the correct clinical setting . There is no overt evidence for edema , effusion , pneumothorax or pneumonia . Cardiomediastinal silhouette is stable . Osseous structures appear intact .
    OUTPUT:
    
No overt signs of pneumonia or edema . Mild pulmonary vascular congestion difficult to exclude given extensive bronchovascular crowding in the setting of low lung volumes .