Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size is normal . Aortic knob calcifications are demonstrated . Mediastinal and hilar contours are unremarkable . Lung volumes are lower compared to the previous radiograph . Patchy opacities are noted in the lung bases , more so on the left , compatible with extensive centrilobular and tree - in - ___ nodules seen on the previous CT along with a left lower lobe consolidative opacity . No pleural effusion or pneumothorax is present . There is no pulmonary vascular engorgement .
    OUTPUT:
    
Patchy bibasilar airspace opacities , more pronounced on the left , not changed from the previous radiograph accounting for differences in inspiration and compatible with infection .