Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate well expanded clear lungs . Mild cardiomegaly is redemonstrated . There is no pleural effusion or pneumothorax .
    OUTPUT:
    
Unchanged mild cardiomegaly . Otherwise normal chest radiograph . A preliminary read was provided by ___ , MD , to ___ , NP , at ___ on ___ .