Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: The cardiomediastinal silhouette is normal . There is no pleural effusion or pneumothorax . There is no lobar consolidation . There is a diffuse interstitial abnormality , with a reticular an nodular pattern , right greater than left . Views of the upper abdomen are unremarkable .
    OUTPUT:
    
Diffuse interstitial abnormality , right greater than left , of uncertain chronicity . If the patient has clinical symptoms of acute infectious pneumonia , findings could represent atypical infection , an a followup chest radiograph would be recommended ___ weeks after treatment . In the absence of infectious symptoms , high - resolution chest CT may be helpful for further characterization , particularly if older outside radiographs are unavailable for comparison