Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates slightly low lung volumes . The cardiac silhouette is mildly enlarged . The pulmonary vasculature is unremarkable . There is no pleural effusion or pneumothorax . No focal consolidation is identified . A left PICC is terminates at the junction of SVC and lfet brachiocephalic vein . Cervical fixation hardware is present .
    OUTPUT:
    
No definite acute intrathoracic abnormality .