Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube is identified in proper position . There are bilateral parenchymal opacities with most dense consolidation at the left lung base and left mid lung but also seen at the right lung base . There may be a component of left pleural effusion . The cardiac silhouette is upper limits of normal for technique and positioning . Osseous structures are unremarkable .
    OUTPUT:
    
Bilateral parenchymal opacities , left greater than right , could represent multifocal infection / aspiration , edema or hemorrhage , among others given complex medical history . Probable left pleural effusion .