Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest were obtained . There is mild cardiomegaly . The mediastinal and hilar contours are unremarkable . There are low lung volumes resulting in apparent crowding of bronchovascular structures . There is no focal consolidation concerning for pneumonia . Obscuration of the left hemidiaphragm may indicate a small left effusion . There is no right pleural effusion . Again seen is calcification of the mitral valve annulus .
    OUTPUT:
    
Mild cardiomegaly with possible small left pleural effusion . No overt signs of pneumonia or edema .