Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Patient has known left lung mass , better assessed on prior CT . Small left pleural effusion is mildly improved and the left heart border is more distinct distinct . Opacities in the right mid lung and base have mildly improved . No evidence of pulmonary edema . Cardiomediastinal structures are midline .
    OUTPUT:
    
Mild improvement in left pleural effusion and opacities in the right mid lung and base . No evidence of pulmonary edema . If concern for PE persists , recommend dedicated CTA for further evaluation .