id	keyword
alkej-556	tissue
alkej-556	breast
alkej-556	scattering
alkej-556	frequency
alkej-556	laser
alkej-556	photon
alkej-556	wavelength
alkej-556	modulation
alkej-556	absorption
alkej-556	source
alkej-556	phase
alkej-556	tumor
alkej-556	light
alkej-556	amplitude