Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: AP and lateral views of the chest were obtained . The exam is limited by low lung volumes and the patient 's positioning and kyphosis . The heart is moderately enlarged . There are bilateral perihilar ill - defined opacities , similar in appearance to prior radiograph and consistent with pulmonary edema . The lung bases are poorly assessed secondary to kyphosis . The cardiomediastinal contour appears similar to prior radiograph . No large pneumothorax is seen .
    OUTPUT:
    
Unchanged pulmonary edema .