Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Focal air space consolidations in the posterior aspects of the right infrahilar region , left upper lobe and left lateral lung base are consistent with multifocal pneumonia . Small left pleural effusion is minimally worse , if at all . There is no pneumothorax . No evidence of vascular congestion or cardiac decompensation . Mediastinal and hilar contours are stable . Heart size is normal .
    OUTPUT:
    
Multifocal pneumonia , as described . This could be due to atypical infection , such as mycoplasma or Legionella . Recommend follow - up chest radiograph in ___ weeks following antibiotic therapy .