Abstract:
A system and method of detecting diseased cells in a large population of normal cells that uses flow cytometry and vibrational spectroscopy techniques. The system and method combine flow cytometry with a spectrometric system to detect inherent properties of each cell examined, inherent properties that not only discriminate between the presence or absence of disease but also the degree at which the cell is diseased. More specifically, the system and method combine the use of flow cytometry to separate cells of the sample population and Raman or resonance Raman spectroscopic techniques for detecting inherent differences in cells for the purpose of determining whether cells are diseased and level of disease in the cells. This is accomplished by forming a stream of cells by flow cytometry into the sampling region at which each cell is irradiated by an incident beam of a Raman laser. The scattered Raman spectrum from each cell is detected by a Raman spectroscopy. More specifically, a complete Raman spectrum or resonance Raman spectrum is detected for each cell flowing past the incident beam. This will provide information as to whether the specific cell in the beam of the incident light is normal or diseased, and the level of disease also may be determined on the details of the spectrum detected.
Abstract:
A system and method is described for permitting the simultaneaous automated collection of data with regard to the presence of diseased cells, in particular neoplastic, dysplastic or cancerous cells, or normal cells at a given site in a section of tissue. This is accomplished according to the following steps. First, IR spectral data are collected simultaneously for each cell or pixel of the tissue. The present invention utilizes step scanning Fourier transform technology, where a moveable interferometer is used as a spectral filter. Next, these data are analyzed by identifying the cell types encountered in the sample by comparing them with reference data sets for healthy and diseased cells. Finally, a false color mapping of the distribution of different types of cells in the tissue section is presented that permits assessment of the prevalence of diseased cells.
Abstract:
A biological cell sample holder (100) for use in vibrational spectroscopy. The sample holder includes a rectangular body (102) that has a central relief area (104) and an opening (106) through the relief area. A porous membrane (108) is disposed in the opening and a metal coated disk (110) is disposed on top of the porous membrane. The disk has pores of a predetermined size to allow fluid to pass through the disk but retain cells of interest on the disk.