Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Heart size , mediastinal and hilar contours are normal . New patchy opacities have developed in the right perihilar and left retrocardiac regions , with otherwise clear lungs , and no evidence of pleural effusion or pneumothorax . No sternal or parasternal abnormality detected but positioning is subotpimal on lateral view with arms overlying the sternal region .
    OUTPUT:
    
Rapid development of multifocal patchy opacities , which could be due to multifocal aspiration , and less likely asymmetrical edema or a rapidly developing infection . No sternal or parasternal abnormality detected on this limited study but dedicated sternal radiographs or CT would be much more sensitive .