Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The heart is normal in size but demonstrates left ventricular configuration . The aorta is tortuous and calcified , without change . Recently described left lower lobe abnormality has rapidly improved with small residual opacity remaining . Additional right retrocardiac opacity has slightly improved as well . Bilateral pleural effusions are small and similar to the recent radiograph . Bones are diffusely demineralized .
    OUTPUT:
    
1 . Rapidly improving basilar opacities favor atelectasis or aspiration over infectious pneumonia . 2 . Small bilateral pleural effusions .