Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Portable upright frontal and lateral views of the chest provided . The lungs are clear without focal consolidation , effusion , or pneumothorax . The heart and mediastinal contours are normal . Atherosclerotic calcifications are noted along the aortic knob . The bony structures are intact . Degenerative spurring in the mid thoracic spine is noted .
    OUTPUT:
    
No acute intrathoracic process .