Fig. 1: Illustration of wireless measurement of lesion and skin impedance, photos of the patch and circuit model of the device and tissues.
From: Wearable battery-free chip-less patch for bioimpedance measurement of cutaneous lesions
a Magnetic coupling between the patch on skin and the reader module and wireless injection of electrical current in healthy and cancerous tissue. b Detailed view of patch with resistor, capacitor, and inductor. The microscopic image of one electrode presented in the subset. c Photos of the patch showing it is bendable and is attached to the skin with medical tape. d Circuit diagram describing wireless measurement of human skin impedance. The circuit model for bioimpedance of skin tissue with intracellular current for high frequencies (CCM and RIC) and extracellular current at lower frequencies (REC).
