Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A PICC line has been removed . The cardiac , mediastinal and hilar contours appear unchanged . The right lung remains clear . There is again mild relative elevation of the left hemidiaphragm with patchy opacification most suggestive of atelectasis , although somewhat improved . There is no pleural effusion or pneumothorax . Prior healed fractures involve the right posterolateral sixth and seventh ribs . The bones are probably demineralized .
    OUTPUT:
    
No evidence of acute disease . Persistent volume loss and atelectasis in the left lower lung , but most recently somewhat improved .