Summarize the radiology report findings into an impression within 3 sentences.
    INPUT: Lung volumes are very low , exaggerating cardiomediastinal silhouette and pulmonary vascular markings . Linear density in the right lower lung field likely represents atelectasis . The patient 's chin obscures the medial portions of the lung apices . On this limited study , no pleural effusion or pneumothorax is detected . Lower thoracic vertebra plana is chronic . Right humeral head hardware is noted . Diffuse bony mottling is likely secondary to myeloma .
    OUTPUT:
    
Markedly low lung volumes , limiting evaluation , with right lung atelectasis .