Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Tracheostomy tube is seen in situ and is in a standard position . Both lung volumes are low . Perihilar and lower lung opacity is new and is concerning for aspiration or asymmetric pulmonary edema considering very rapid development over last 24 hours . Minimal left perihilar and lower lung opacities are seen but are obscured by the cardiomediastinal silhouette due to the rotation of patient . Assessment of cardiomediastinal silhouette was limited because of low lung volumes and rotation of patient . Right pleural effusion is unchanged .
    OUTPUT:
    
Right perihilar and lower lung opacity which has developed over last 24 hours is likely from aspiration or asymmetric edema . Pleural effusion is unchanged .