Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously described right upper lobe opacity has resolved . Lungs are clear except for a small calcified granuloma in the right upper lobe . Cardiomediastinal contours are unchanged . Persistent prominence of main pulmonary artery contour . Lung volumes are increased with flattening of hemidiaphragms suggestive of COPD . There are no pleural effusions or acute skeletal findings .
    OUTPUT:
    
1 . Resolution of right upper lobe opacity . 2 . Prominent main pulmonary artery contour suggesting the possibility of pulmonary arterial hypertension .