Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Moderate cardiomegaly and pulmonary vascular plethora , including the hila , are chronic , but mild edema present on ___ has cleared . There is no pneumonia or appreciable pleural effusion .
    OUTPUT:
    
1 . Chronic congestive heart failure , improved since ___ . No acute intrathoracic process .