The Guided Therapeutics LightTouch™ device uses light to detect chemical and structural changes in cervical tissue.  A broad array of light frequencies is shown on the cervix.  Light that is returned from the cervix is analyzed by a spectrometer.  Information from the s pectrometer is then used to generate an image of the cervix showing healthy tissue from disease.  This technology is called biophotonics.

Biophotonics is the technology of using light and other energy to diagnose and monitor disease states.  Light responds differently when exposed to normal cells and cancerous cells.

Specifically the technology being developed for the cancer product is called hyperspectral imaging spectroscopy or HIS.  HIS is capable of acquiring the individual spectrum of each cell component while it is in the body.  The device then identifies physiological markers of cancer based on their spectral signatures.