Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: No definite focal infiltrate is identified . Compared to the prior film , there is slight increase in the degree of vascular engorgement , consistent with mild superimposed CHF . No frank consolidation or gross effusion . Again seen is background COPD and cardiomegaly , with sternotomy wires , including fractured sternotomy wires superiorly , similar to the prior study . The right IJ central line is no longer visualized . Partial image right humeral hardware noted .
    OUTPUT:
    
Probable slight increase in CHF findings . No definite superimposed infiltrate . The possibility of an early occult infiltrate can not be entirely excluded .