A Wearable Wrap-Around Sensor for Monitoring Deep Tissue Electric Properties

Int J RF Microw Comput Aided Eng

Shamim

et al. 2018

This article presents the design of a low complexity, low power, small‐sized, wearable, inkjet printed, cheap, and noninvasive radio frequency (RF) based sensor array for pulmonary edema and emphysema condition monitoring inside the patient chest. The RF sensor consists of 38 electrodes and 37 ports. The size of the sensor is 4 cm × 89.4 cm to cover the chest of an average adult. The sensor is optimized to operate at 60 MHz. The scattering coefficients Si1 are measured at each passive port and then the Least Squares (LS) method is used to form an equation for average dielectric constant estimation. The dielectric constant estimation method is used to detect the presence of water/air in human and porcine lungs. The average measured dielectric constants of normal human lung tissue, edema, and emphysema infected lungs are estimated with errors of 3.54%, 4.83%, and 4%, respectively. The porcine lung tissue‐mimicking phantom with proper electrical properties is formed using a water and salt (NaCl) mixture. To detect the different stages of pulmonary edema, 200 mL water balls are inserted in the inner layer of the chest model. The measured errors were 2.68%, 0.87%, 2.18%, and 2.8% for normal porcine lung, adding 6 water balls, adding 12 water balls, and adding 18 water balls, respectively.

Section: Literature Surveymentioning

confidence: 99%

Section: Rf Sensor Designmentioning

confidence: 99%

Section: Rf Sensor Designmentioning

confidence: 99%

Section: Literature Surveymentioning

confidence: 99%

mentioning

confidence: 99%

See 3 more Smart Citations

A low complexity RF based sensor array for lung disease detection using inkjet printing

Tayyab

Int J RF Microw Comput Aided Eng

Shamim

et al. 2018

Superstrate loaded miniaturized patch for biomedical telemetry

Mohamed

Muqaibel

Micro & Optical Tech Letters

2017

A Superstrate loaded miniaturized patch antenna is proposed for biomedical applications. The targeted operating frequency is (902–928 MHz) ISM band with a center frequency of 915 MHz. The antenna is designed to operate in close proximity with human‐body with a size of 25 × 25 × 1.92 mm3. Parametric studies were conducted to specify the dominant parameters and to understand their effect on the antenna performance. Measurements show that the fabricated antenna resonates around 915 MHz with a 30 MHz impedance bandwidth. On‐skin measurement results are presented for several spots on the human‐body. Furthermore, the transmission coefficient (S21) of the fabricated antenna is measured using lean beef slices with various thicknesses and showed good agreement with simulation results. © 2017 Wiley Periodicals, Inc. Microwave Opt Technol Lett 59:1212–1218, 2017

Inkjet Printed RF Sensor Array For Lung Disease Detection

Tayyab

12th European Conference on Antennas and Propagation (EuCAP 2018)

Shamim

2018

We propose an RF sensor array for lung disease detection. The size of the sensor array is 4cm * 89.4cm. The sensor consists of 38 electrodes and 37 ports. The first two electrodes are optimized to operate at 60 MHz and act as a signal exciter. The remaining 36 electrodes receive the radiated field. The transmission coefficients Si1 at each passive port are calculated using HFSS software. An equation was designed for dielectric constant estimation using the Least Squares (LS) method. The sensor is fabricated using Inkjet printing. The experiments of the fabricated sensor were conducted on an average adult human chest elliptical model.