Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable semi-upright radiograph of the chest demonstrates a left - sided Port - A - Cath terminating in the right atrium , without evidence of pneumothorax . No definite focal consolidation is identified . Basilar opacities have somewhat improved since the prior examination . The cardiac silhouette is unremarkable .
    OUTPUT:
    
No acute intrathoracic abnormality .