Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette . The lungs again demonstrate bibasilar atelectasis , but are otherwise clear . There is no pleural effusion or pneumothorax . Incidentally noted is an imcompletely imaged distended loop of colon measuring up to 6 cm , superimposed above the liver .
    OUTPUT:
    
1 . No acute radiographic cardiopulmonary abnormality . 2 . An incompletely imaged distended loop of colon is incidentally noted . A dedicated abdominal radiograph can be obtained for further evaluation if clinically indicated .