Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Multifocal opacities in the left lung , some quite nodular , is most likely multifocal pneumonia , but needs followup radiographs to exclude other concurrent diagnoses . Vague heterogeneous opacity overlying the right lower lung may also represent small consolidation . No substantial pleural effusion or pneumothorax . The heart size and cardiomediastinal contours are normal .
    OUTPUT:
    
Multifocal pneumonia involving the left lung and possibly the right lower lobe . Follow up CXR needed in 4 weeks to document substantial clearing in order to exclude other conditions .