| 摘要 |
A source of high frequency electromagnetic radiation is coupled to a specimen containing a target chemical whose presence and/or concentration is to be ascertained. Preferably, the source radiation includes a plurality of high frequency spectra. The source radiation is coupled to the specimen via a probe pair that is also used to access a return signal representing an interaction between the source signal and the specimen. The return signal is processed to yield a spectral signature correlating to the target chemical and/or its concentration. An apparatus for performing the analysis comprises conductive probes (6), display system (20) oscillators (50, 58), microprocessor (74), phase detectors (72, 92) and neural network (100). In the preferred embodiment, the specimen is a human finger that is pressed against the probe pair, and the chemical is glucose. The invention thus permits a lay user to determine his or her own glucose level. |
