Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Bilateral lung opacities have slightly improved since previous exam but are still moderate - to - severe in this patient with known dilated cardiomyopathy and a pacer / defibrillator with leads in the right atrium and ventricle . There is no pneumothorax and no pleural effusion . Right - sided PICC line ends in upper atrium .
    OUTPUT:
    
Slight improvement of diffuse lung opacities .