Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Again seen in the right upper lung is a linear airspace opacity , decreased in conspicuity in comparison to chest x-ray from ___ . Otherwise , the lungs are clear without focal consolidation . The cardiomediastinal contours are within normal limits . The bilateral hila are unremarkable . There is no evidence of pulmonary vascular congestion . There is no pneumothorax or pleural effusion .
    OUTPUT:
    
1 . Decreased conspicuity of right upper lung linear airspace opacity as seen on numerous prior studies , better assessed on prior chest CT , possibly reflective of recurrent chronic pneumonitis . 2 . Otherwise , clear lungs without focal consolidation .