Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate a normal cardiomediastinal silhouette and well - aerated lungs which are clear . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Unchanged chest radiograph without evidence of pneumonia . A preliminary read was provided upon request via telephone by ___ , MD , to ___ , APN , at ___ on ___ .