Abstract:
A method to detect vibrations associated with biomolecules in tissues and cellsuses Resonance Raman (RR) spectroscopy to measure specific biomolecules in tissue and cells signals. The changes of RR lines of key molecules present to the chemical conformations and change due to disease such as cancer and heart disease. Biomolecules are collagen, flavins, tryptophan, NADH, NAD, etc. The laser beams excite RR of vibration associated with absorption of the key native molecules in tissue (Tryptophan, NADH, Flavins, Collagen, carotenoids, porphyrins and others. The margin assessment and RR images in 2D and 3D regions are found by RR signals using position scanners. The intensity and the numbers of molecule fingerprints indicate the prescence of and the degree of the changes of chemical conformations.
Abstract:
There is a need for a compact instrument and microscope that maps the vibration fingerprints of biomolecules and chemicals in a sample such as brain, breast, cervix, and arteries. One can use spontaneous Raman scattering to accomplish this; however, the problem is low scattering efficiency to 10−5. With the availability of continuous wave diode laser at numerous wavelengths from 375 nm-1800 nm for parametric nonlinear difference vibrational mixing to enhance Stimulated Raman process within materials. A seed beam at Raman frequency is used with pump laser beam. In this way one can map in 2D and 3D images of the vibrations associate with disease changes. Scanning a pair of laser beams can map the location of vibrations within cells, smears, membranes, arteries, and tissues of animal and human.