The invention relates to a non-invasive method to diagnose the changes of
molecular structures of organism tissues from body surface and a
dedicated apparatus. The apparatus is comprised of a Fourier Transform
infrared spectrometer and a set of additional accessories. Said
additional accessories include a mid-IR fiber optics sampling attachment,
a fiber coupling part, and an infrared detector part. The detection
method is comprised of placing the ATR probe of the dedicated apparatus
on the skin surface of a region to be tested, and scanning more than one
time in which the resolution of the apparatus is 1-32 cm.sup.-1 and the
range of the spectrum is 800-4000 cm.sup.-1. It is possible to detect
changes in molecular structures of living biological tissues in the early
stages of cancer, and testees will not feel uncomfortable during testing.
The method is easy to operate, quick, accurate, and it doesn't harm the
body.