Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . Patchy medial right lung base opacity , more prominent than on the prior study , most likely relates to underlying vascular structures ; however , an underlying evolving consolidation is not excluded in the appropriate clinical setting . The left lung is clear . There is no pleural effusion or pneumothorax . The cardiac and mediastinal silhouettes are stable with the aorta calcified and tortuous . No overt pulmonary edema is seen . Degenerative changes are seen along the spine .
    OUTPUT:
    
Patchy medial right lung base opacity , more prominent compared to the prior study , most likely represents confluence of vascular structures ; however , an evolving consolidation is not excluded in the appropriate clinical setting .