Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral radiographs of the chest were acquired . There is dense retrocardiac opacification , possibly atelectasis , although infection can not be excluded , similar in appearance compared to the prior radiograph from ___ . There is minimal right lower lung atelectasis . Small bilateral pleural effusions , left greater than right , have decreased . There is fluid tracking within the major fissure on the left . The heart is mildly enlarged , unchanged . The mediastinal contours are normal .
    OUTPUT:
    
1 . Small bilateral pleural effusions , left greater than right , decreased compared to the prior study from ___ . 2 . Unchanged retrocardiac opacification , possibly atelectasis , although infection can not be excluded . 3 . Unchanged mild cardiomegaly .