Human fatty liver signals
In this article, human fatty liver (HFL) volume is measured using the proposed HFL device. The HFL device consists of nano graphene polyvinyl (NGP) sensor and node MCU microcontroller. The NGP sensor acquires electromagnetic radiations from fatty liver (FL), which arise due to dielectric materials in fat. Continuous monitoring of FL volume through various medical imaging instruments leads to frequent exposure of radiation. The HFL device is used for monitoring the FL diseases like other continuous monitoring devices such as diabetes, hemoglobin, and blood pressure for effective diagnosis and treatment of liver diseases. In the HFL device, the NGP sensor is fabricated using the spray pyrolysis method. The NGP sensor consists of different materials such as nano graphene, poly acrylic acid, methylenbisacrylamide (MBAAm), and 2,2-dimethoxy-2-phenyl acetophenone (DMPAP) poly vinyl acetate. The NGP sensor is fixed on the human liver surface and acquires scattering dielectric radiation from liver. The acquired signal is processed with nonnegative matrix filter blind source separation for removal of random motion noise and extracts the FL signals. From the filtered FL signal, instantaneous frequency is obtained through multisynchrosqueezing transform (MSST). Furthermore, FL volume is measured through instantaneous frequency and Gaussian Regression model. The HFL device-based FL volume measurement is validated through FL ultrasound (US) image-based volume measurement and provides an accuracy of about 85%.
Signals collected using NGP senor from fatty liver person and normal persons