FIG. 2.

Computerized tomographic scans of mice exposed to nebulized or intratracheal liquid perflubron. Maximal-intensity projection images demonstrate regions of greatest X-ray attenuation, which in these specimens correspond to bone and to perflubron. The “double-vision/ghosting” artifact is due to specimen settling during the 80-min scan. (A) Nebulized perflubron (arrow highlights perflubron in the stomach). (B) For comparison, intratracheal instillation of liquid perflubron is depicted (arrows highlight perflubron in the lungs). Representative scans from one of three similarly treated mice for each condition are shown.