Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The patient is status post median sternotomy . There is continued elevation of the right hemidiaphragm , increased since the prior study and was likely a subpulmonic effusion . Underlying infectious process is not excluded . There is prominence of the pulmonary vasculature bilaterally concerning for fluid overload . Asymmetric right pulmonary opacity could represent asymmetric edema and pleural effusion however , early infectious process is not excluded . The lateral view is suboptimal due to patient motion and overlying soft tissue . Degenerative change is seen in the right shoulder joint and the right acromioclavicular joint .
    OUTPUT:
    
Low lung volumes . Right basilar opacity with perceived elevated right hemidiaphragm is likely due to a subpulmonic pleural effusion . Additional right base opacity is concerning for a possible superimposed infectious process . However , prominence of the bilateral pulmonary vasculature is concerning for fluid overload . Cardiac silhouette remains enlarged . The aortic knob is calcified .