Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: There is a central venous catheter terminating at the cavoatrial junction , inserted via a right subclavian approach . The heart is mild - to - moderately enlarged with a globular configuration . The aortic arch is calcified . The aortopulmonary window is slightly prominent suggesting possible enlargement of the main pulmonary artery . Central pulmonary arteries are also mildly enlarged . There is an asymmetric left paramedian opacity with upward tenting , perhaps a form of scarring . Bilateral perihilar fullness suggests mild superimposed pulmonary congestion , however . A moderate left - sided pleural effusion is also noted . Associated parenchymal opacity is suspected , probably attributable to associated atelectasis , although infectious etiology is not entirely excluded .
    OUTPUT:
    
Moderate left - sided pleural effusion . Cardiomegaly and prominent central pulmonary vascularity and suspected congestion . Asymmetric left perihilar opacification with a relatively straight edge , possibly due to scarring and congestion ; correlation with prior radiographs is suggested as well as clinical history .