Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: PA and lateral views the chest provided demonstrate midline sternotomy wires and mediastinal clips . Left chest wall pacer device is unchanged with lead extending into the region of the right ventricle . Mild cardiomegaly is unchanged with stable mediastinal contour and aortic calcifications noted . Lungs are clear . Increased lucency in the upper lungs is consistent with emphysema . There is no pulmonary edema . No pneumothorax or pleural effusion . Severe compression deformity of an upper thoracic vertebral body and vertebroplasty of a mid thoracic vertebral body are overall similar to the prior examination .
    OUTPUT:
    
Mild cardiomegaly unchanged . No acute intrathoracic process .