Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A single portable AP chest radiograph was obtained and is limited by portable technique and patient rotation . Focal opacity at the left base appears more conspicuous compared with prior studies dating back to ___ . No other distinct consolidation is identified . There is no effusion or pneumothorax . Mild cardiomegaly is unchanged . Tracheostomy tube remains in unchanged position . Right upper quadrant surgical clips and a percutaneous gastrostomy tube are in appropriate positions .
    OUTPUT:
    
Increased conspicuity of left lower lobe opacity could represent developing consolidation and / or aspiration or atelectasis .