Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Cardiomegaly , moderate to severe , is stable . The aorta is tortuous and the knob is calcified . Trachea is slightly deviated to the right . There is flattening of the hemidiaphragm suggestive of volume overload . Bibasal atelectasis is present . Small right pleural effusion is stable over multiple prior studies . There are no focal opacities concerning for pneumonia .
    OUTPUT:
    
Stable radiograph with moderate to severe cardiomegaly but no focal opacities concerning for pneumonia .