The technique of analysing light which penetrates the skin, then reflects, then penetrates the skin again on the way out? Easier with skin that allows more light through.
You can turn up the light source to make up for the loss due to skin pigmentation, though this can require a very bright lamp for particularly dark skin.
The technique of analysing light which penetrates the skin, then reflects, then penetrates the skin again on the way out? Easier with skin that allows more light through.
You can turn up the light source to make up for the loss due to skin pigmentation, though this can require a very bright lamp for particularly dark skin.