Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Available for comparison is a next preceding chest examination in our records dated ___ . The heart size is within normal limits . No configurational abnormality is identified . Mild widening of the thoracic aorta at the level of the arch , but no local contour abnormalities or walled calcifications are identified . The pulmonary vasculature is not congested . There is no evidence of acute pulmonary parenchymal infiltrates . Noted are , however , relatively low positioned diaphragms with bilateral basal lung appearance of hyperinflation with scarcity of vasculature and some irregularity in the peripheral distribution . Acute parenchymal infiltrates can not be identified . The pleural spaces including lateral and posterior pleural sinuses are free from any fluid accumulation and there is no pneumothorax in the apical area . In comparison with the next preceding portable chest examination of ___ , findings are rather unchanged . Hyperinflated base of lungs were noted already on the previous study .
    OUTPUT:
    
No cardiac enlargement , pulmonary congestion , but radiographic signs compatible with chronic basal emphysema , finding that matches the patient 's smoking history and smoke exposure .