Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Allowing for differences in technique , the cardiac , mediastinal and hilar contours appear unchanged . There is persistent left basilar opacification but improved . It is difficult to exclude a coinciding pleural effusion . Comparing to the prior CT , there has probably also been some improvement . Small osteophytes are present throughout the mid thoracic spine .
    OUTPUT:
    
Persistent left basilar consolidation but improved to some degree . Mild degenerative disease along the thoracic spine .