Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Supine portable AP view of the chest . There is mild bibasilar linear opacities consistent with atelectasis . The upper lungs are clear . The cardiac , mediastinal , and hilar contours are unremarkable . Possible sclerosis of the T9 left rib posteriorly and lateral portion of the left scapula . No pleural effusions . No pneumothorax .
    OUTPUT:
    
1 . Mild bibasilar atelectasis . 2 . Possible sclerosis of the left posterior T9 rib and left scapula , which may be artifactual . Can further assess with conventional PA and lateral chest radiographs , and bone detail views , if clinically indicated .