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Improving sensitivity in the deep regions of a volume conductor using electrical focused impedance methods.
J Electr Bioimpedance
January 2024
Department of Biomedical Physics and Technology, University of Dhaka, Dhaka, Bangladesh.
Bioimpedance measurements are becoming important in probing the human body for diagnosis and monitoring. An age old 4-electrode technique called tetrapolar impedance measurement (TPIM), giving transfer impedance, cannot localize a specific zone besides having large zones of negative sensitivity. A new technique named the focused impedance method (FIM) from Dhaka University (DU), Bangladesh used the algebraic average of two concentric and orthogonal TPIMs, localizing a zone of interest and having reduced magnitudes of negative sensitivity.
View Article and Find Full Text PDFVariations in bioelectrical impedance devices impact raw measures comparisons and subsequent prediction of body composition using recommended estimation equations.
Clin Nutr ESPEN
October 2024
Department of Epidemiology, University of Hawai'i Cancer Center, 701 Ilalo St, Honolulu, HI, 96813, USA.
Article Synopsis
- Bioelectrical impedance analysis (BIA) is increasingly used for body composition estimation in both clinical and field settings, but device variations and equations can lead to inconsistent results.
- This study evaluated raw resistance and reactance measurements from three different BIA devices to identify inter-device variation and its effect on body composition predictions among athletes.
- Results showed significant differences in impedance measurements and body composition estimates across devices, with variations as large as 8.8 kg, underlining the importance of using population-specific equations for accurate assessments.
Cell growth monitoring in a tetrapolar electrode configuration.
J Electr Bioimpedance
January 2024
SCTIMST, Trivandrum, India.
There are various methods for cell growth monitoring. However, most of these methods have drawbacks, such as being invasive, not providing real-time results, or being costly. In this study, we present an alternate method of cell growth monitoring, which is low-cost, non-invasive, real-time, and uses Electrical Impedance Spectro-scopy (EIS).
View Article and Find Full Text PDFSensitivity study of a locally developed six electrode focused impedance method.
J Electr Bioimpedance
January 2024
Department of Biomedical Physics & Technology, University of Dhaka, Dhaka, Bangladesh.
The Focused Impedance Method (FIM) is a new technique of electrical bioimpedance measurements in the human body. The idea originated in Bangladesh and provides an opportunity for localized measurement of bioimpedance down to reasonable depths from the body surface using skin surface electrodes. This has potential applications for physiological studies of targeted organs in the body and in detecting or diagnosing diseases and disorders.
View Article and Find Full Text PDFNovel tetrapolar single-needle electrode for electrochemotherapy in bone cavities: Modeling, design and validation.
Med Eng Phys
March 2024
Institute of Biomedical Engineering, Federal University of Santa Catarina, Florianópolis, 88040-900, SC, Brazil.
Electrochemotherapy is a cancer treatment in which local pulsed electric fields are delivered through electrodes. The effectiveness of the treatment depends on exposing the tumor to a threshold electric field. Electrode geometry plays an important role in the resulting electric field distribution, especially in hard-to-reach areas and deep-seated tumors.
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