Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Compared with ___ , no definite interval change . Mild convexity of the left heart border is more pronounced , but similar to ___ . Patchy opacity in the left cardiophrenic region is similar on the previous chest x-rays from ___ and ___ . There is also minimal atelectasis at the left lung base . No gross left effusion . As before , the left hemidiaphragm is slightly elevated . Minimal blunting of the right costophrenic angle could be new . No CHF . No other areas of focal opacity .
    OUTPUT:
    
Patchy opacity in left cardiophrenic region is unchanged compared with multiple prior films an more likely represent an area of atelectasis and / or scarring . Otherwise , no focal opacities are identified to suggest pneumonia . Minimal blunting of right cardiophrenic angle could be new . No gross effusion seen on either side .