Most of those are fixed light source-detector , so it can only monitor the change of blood oxygen metabolizing in a certain depth.
广泛采用的光源与探测器间距固定的装置，只能反映组织特定深度的血氧信息；
Buddha of Fixed light. It is told that when he was born his body is surrounded with all lights.
燃灯佛，相传其出生时身边一切光明如灯。
Buddha of Fixed light. It is told that when he was born his body is surrounded with all lights.
燃灯佛，相传其出生时身边一切光明如灯。
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