Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiograph demonstrates clear lungs . There is no focal consolidation . Prior seen opacification within the right lower lobe has cleared . There is interval development of right - sided moderate layering pleural effusion . Left lung is clear . There is no pneumothorax . Interval cardiothoracic surgery as demonstrated by change in sternotomy wires and no replaced aortic and mitral valve repairs . Heart size is within normal limits . There is a tortuous descending aorta , though a degree of dilatation can not be excluded . Pulmonary vasculature is unremarkable . Mediastinal and hilar contours are within normal limits . Right upper lobe densities consistent with surgical clips .
    OUTPUT:
    
No pneumonia . New right moderate sized pleural effusion when compared to chest radiograph dated ___ .