Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine frontal , upright AP , and upright lateral images of the chest were acquired . Exam is very limited due to portable technique and patient body habitus . The lung volumes are very low . With associated bronchovascular crowding . Supine positioning is responsible for substantial amount of vascular engorgement compared to prior exam in ___ when vessels were normal . This engorgement , along with patient body habitus , makes it difficult to tell if there is heart failure or not . No large pleural effusion is seen . The cardiac silhouette is enlarged .
    OUTPUT:
    
Limited exam due to patient body habitus and portable technique . Supine positioning is responsible for substantial amount of vascular engorgement compared to prior exam in ___ when vessels were normal . This engorgement , along with patient body habitus , makes it difficult to tell if there is heart failure or not . No definite acute cardiopulmonary process .