Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient upright position . Comparison is made with the next preceding similar study of ___ . The heart size is now within normal limits . The thoracic aorta is unchanged in appearance and shows rather advanced wall calcifications at the level of the arch . The pulmonary vasculature is not congested . The previously described multiple rib fractures in the right hemithorax located posteriorly and involving ribs # 3 , 4 , 5 , 6 , and 7 appear rather unchanged . The pleural effusion persists but has decreased in size . No new pulmonary parenchymal abnormalities are seen and no pneumothorax is present in the apical area .
    OUTPUT:
    
Slow regression of previously described right - sided pleural effusion appearing in conjunction with trauma and multiple right - sided rib fractures . No pneumothorax . Heart size is now within normal limits .