Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Right infrahilar parenchymal airspace opacity with slight indistinctness of the the right heart border is concerning for right middle lobe pneumonia . There is also some degree of right middle lobe atelectasis . Retrocardiac opacity is probably atelectasis . There may be minimal pulmonary edema with bronchovascular congestion . The heart remains slightly enlarged . Cardiac defibrillator device is unchanged in position . The mediastinum is not widened . No pneumothorax . No acute fracture . Anterior cervical spinal hardware is incompletely imaged .
    OUTPUT:
    
1 . Right middle lobe pneumonia . Recommend follow - up chest radiograph in ___ weeks after treatment to ensure resolution and exclude underling obstructing mass given associated right middle lobe atelectasis . 2 . Mild background edema .