Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest radiograph demonstrates no focal opacity convincing for pneumonia . Since prior examination performed ___ , there has been interval resolution of a left pleural effusion . No pleural effusion is present on today 's examination . There is no pneumothorax . There is mild cardiomegaly without pulmonary edema . There is no air under the right hemidiaphragm .
    OUTPUT:
    
Mild cardiomegaly without pulmonary edema . No evidence of pneumonia .