Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Since ___ , minimal pulmonary edema , small residual bilateral pleural effusions , left greater than right , and mild bibasilar and retrocardiac atelectasis are improved . Mild cardiomegaly is unchanged . No pneumothorax . Calcifications are noted in the mitral and aortic annulus .
    OUTPUT:
    
Minimal pulmonary edema , small bilateral pleural effusions , left greater than right , and mild bibasilar and retrocardiac atelectasis are improved since ___ .