Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral chest views were obtained with patient in upright position . Analysis is performed in direct comparison with the next preceding similar study of ___ . Heart size is difficult to assess because of overlying left - sided pulmonary abnormalities . Heart size is probably normal as there is no evidence of pulmonary vascular congestion . Multiple previous chest examinations are reviewed in sequence , demonstrating that the fibrotic changes have progressed continuously since ___ . Comparison with the next preceding chest examination of ___ demonstrates further progress to a lesser degree . Again , there are bilateral , mostly basal linear changes , most marked on the left side where there also blend with the mediastinal structures and obscure the cardiac contours . On the left base laterally , in the vicinity of the chest wall , there are increased local densities identified , which are suggestive of possibly new acute processes . The diagnosis is not conclusive in light of the previously existing rather advanced changes . It is therefore suggested to treat the patient for the present acute infection and take a followup chest examination with shorter time interval ( one week ) to see if these changes are regressing .
    OUTPUT:
    
Mild regression of chronic fibrotic changes since ___ . Suspicion for local left lower lobe lateral infiltrate . Recommend followup .