Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Single semierect frontal view of the chest demonstrates a left pectoral pacer / AICD with leads terminating in the right atrium and right ventricle . The lung volumes are low , accentuating cardiomegaly . There is no vascular congestion . Equivocal opacity in the left costophrenic angle correlates with consolidation on subsequent CT . The right lung is clear .
    OUTPUT:
    
Equivocal opacity in the left base , where there is confluent and increased consolidation on subsequent CT .