Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is mild to moderately enlarged . There is heterogeneous opacification involving the left mid to lower lung suggesting opacities in the lingula and left lower lobe . It is difficult to exclude a small pleural effusion on the left side . There is no pneumothorax . The bones appear demineralized . Mild degenerative changes are noted along the mid through lower thoracic spine . Vascular calcifications are extensive .
    OUTPUT:
    
Heterogeneous opacification and involving left mid to lower lung regions , probably due to pneumonia . Follow - up radiographs are recommended to show resolution . Mild to moderate cardiomegaly .