Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate to severe cardiomegaly is re - demonstrated but similar compared to the prior study . The mediastinal contour is unchanged . Mild perihilar haziness with vascular indistinctness is compatible with mild pulmonary edema , slightly worse when compared to the prior exam . No pleural effusion or pneumothorax is noted . There are no acute osseous abnormalities detected .
    OUTPUT:
    
Mild congestive heart failure , slightly worse compared to the prior exam .