Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Dual lead defibrillator with the tips in the right atrium and right ventricle have not changed , given for differences in patient positioning . Low lung volumes with minimal atelectasis , most pronounced in the right middle lobe . Pulmonary vascular congestion has improved . No pulmonary edema . No pleural effusions . Moderate cardiomegaly .
    OUTPUT:
    
Improved pulmonary vascular congestion . No acute consolidation .