Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral views of the chest were obtained . The lungs are clear without focal consolidation , pleural effusion or pneumothorax . The cardiac silhouette is top normal size , slightly larger than the prior study . The pulmonary vasculature is normal . Mediastinal and hilar contours are normal . The nipples projecting over the bilateral lower lungs should not be mistaken for lung nodules .
    OUTPUT:
    
No pneumonia , edema , or effusion . Top normal heart size with interval increase in size of cardiac silhouette .