Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: As compared to prior chest radiograph , lung volumes are decreased causing crowding at the lung bases . Overall , there appears to be interval progression of pulmonary opacities , most prominent at the periphery of the lungs bilaterally . Given the short interval time frame between both studies , findings are concerning for an overlying infectious process . Evaluation of the cardiac silhouette is limited . A right - sided Port - A - Cath catheter remains in unchanged position . There is no pneumothorax .
    OUTPUT:
    
Decreased lung volumes , with interval progression of pulmonary consolidations , which are felt to reflect an overlying infectious process .