<unk>  <unk>  is a form of<unk>  involving<unk> . It is used in imaging of biological soft tissues and has potential applications for early cancer detection. Like<unk>  techniques, this method provides high contrast, and the use of<unk>  also provides high resolution.
Ultrasound-modulated optical tomography
Multispectral optoacoustic tomography
Speckle variance optical coherence tomography
Diffuse optical imaging
Multiple scattering low coherence interferometry
Spectral imaging 
Ultrasound biomicroscopy
Thermoacoustic imaging