Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views of the chest provided . There is chronic elevation of the right hemidiaphragm . There is blunting of the right CP angle which likely indicates a small right pleural effusion . Subtle opacities in the lower lungs may represent atelectasis , less likely pneumonia . The upper lungs appear well aerated . The heart is top - normal in size . The mediastinal contour is stable and normal . The hila appear mildly congested . No acute osseous abnormality .
    OUTPUT:
    
Mild cardiomegaly , hilar congestion with bibasilar opacities likely atelectasis less likely pneumonia . Small right pleural effusion .