抄録
Lipiodol, iodized poppy seed oil, is widely used as a contrast media and can be traced by x-ray. Although it was very slow, lipiodol injected to acupoints flowed along the meridian line upward or downward as was suggested by meridian theory. Tracing of injected lipiodol by x-ray revealed that the meridians are a unique morphological entity through which the material flows.