Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Frontal and lateral chest radiographs demonstrate unremarkable cardiomediastinal and hilar contours . The linear opacifications within the bilateral lung bases likely reflect atelectasis due to poor lung volumes . No pleural effusion or pneumothorax identified .
    OUTPUT:
    
Poor inspiratory effort limiting evaluation of the lungs . No pneumothorax or pleural effusion . No cardiomegaly .