Abstract: A living specimen of a mucous membrane tissue is connected in series with a high-frequency voltage generator and a pair of like-valued resistors. The bulk of the membrane sample is connected via a larger-area contact to the grounded terminal of the generator, while a test spot of the membrane sample is connected via a small-area contact to the terminal of one of the resistors remote from its junction with the other resistor. Measurement of the potential at the test spot and at two other points of the circuit are simultaneously made, and are evaluated in an analog computer or other suitable facilities to derive therefrom the real and imaginary parts of the potential at the test spot of the membrane sample. The relative amplitudes of the real and imaginary components are indicative of the presence or absence of a neoplasm.

Abstract: An apparatus for the automatic measuring of values proportional to impedance components of biological objects, particularly of live tissues, provided with circuitry enabling an automatic and instantaneous recording of two values at the moment the applied voltage reaches a required value.