Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Rotated positioning . Again seen is moderate cardiomegaly . No definite CHF . Minimal atelectasis at both lung bases , but no convincing focal infiltrate and no consolidation identified . Previously seen increased markings at the right base have improved . No gross effusion on either side . The extreme right costophrenic angle is excluded from the film .
    OUTPUT:
    
1 . Left - greater - than - right bibasilar atelectasis . No definite infiltrate . 2 . Allowing for technical differences , previously seen right base infiltrate has improved . Otherwise , I doubt significant change .