Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Previously reported asymmetrical density in the left mid and lower hemi thorax is no longer evident and is probably technical in nature . Cardiomediastinal contours are remarkable for mild cardiomegaly and indwelling biventricular ICD pacing device . Lungs are clear except for minimal linear STIR atelectasis at the right base . There are no pleural effusions .
    OUTPUT:
    
No acute cardiopulmonary radiographic abnormality .