Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: A portable frontal chest radiograph again demonstrates a normal cardiomediastinal silhouette . The lungs are relatively well aerated , with mild vascular congestion and pulmonary edema which is improved compared to ___ . There is no focal consolidation , pleural effusion , or pneumothorax . The visualized upper abdomen is unremarkable . Generalized increased density of the osseous structures is compatible with renal osteodystrophy and unchanged dating back to ___ .
    OUTPUT:
    
No evidence of pneumonia . Mild vascular congestion and pulmonary edema is persistent but improved compared to ___ .