Radar based technology for non-contact monitoring of accumulation of blood in the head: A numerical study
| Autor: | Rafi Korenstein, Moshe Oziel, Boris Rubinsky |
|---|---|
| Přispěvatelé: | Wu, Yongle |
| Rok vydání: | 2017 |
| Předmět: |
Male
Radar cross-section Computer science Physiology lcsh:Medicine 02 engineering and technology Pathology and Laboratory Medicine Signal Vascular Medicine law.invention Remote Sensing 0302 clinical medicine Theoretical law Models 0202 electrical engineering electronic engineering information engineering Medicine and Health Sciences Rayleigh scattering Radar lcsh:Science Musculoskeletal System Brain Mapping Multidisciplinary Blood Volume Physics Electromagnetic Radiation Brain Magnetic Resonance Imaging Body Fluids Wavelength Blood Physical Sciences symbols Engineering and Technology Biomedical Imaging Anatomy Research Article Adult Ellipsoids Monitoring General Science & Technology Acoustics Equipment Geometry Hemorrhage Bioengineering Electromagnetic radiation 03 medical and health sciences symbols.namesake Signs and Symptoms Diagnostic Medicine Medical imaging Humans Physiologic Skeleton Monitoring Physiologic Communication Equipment lcsh:R Skull Biology and Life Sciences 020206 networking & telecommunications Models Theoretical Brain Disorders lcsh:Q Antennas Focus (optics) 030217 neurology & neurosurgery Mathematics |
| Zdroj: | PloS one, vol 12, iss 10 PLoS ONE PLoS ONE, Vol 12, Iss 10, p e0186381 (2017) |
| Popis: | Author(s): Oziel, Moshe; Korenstein, Rafi; Rubinsky, Boris | Abstract: BackgroundThis theoretical study examines the use of radar to continuously monitor "accumulation of blood in the head" (ACBH) non-invasively and from a distance, after the location of a hematoma or hemorrhage in the brain was initially identified with conventional medical imaging. Current clinical practice is to monitor ABCH with multiple, subsequent, conventional medical imaging. The radar technology introduced in this study could provide a lower cost and safe alternative to multiple conventional medical imaging monitoring for ACBH.Materials and methodsThe goal of this study is to evaluate the feasibility of using radar to monitor changes in blood volume in the brain through a numerical simulation of ACBH monitoring from remote, with a directional spiral slot antennae, in 3-D models of the brain. The focus of this study is on evaluating the effect of frequencies on the antennae reading. To that end we performed the calculations for frequencies of 100 MHz, 500 MHz and 1 GHz.Results and discussionThe analysis shows that the ACBH can be monitored with radar and the monitoring resolution improves with an increase in frequency, in the range studied. However, it also appears that when typical clinical dimensions of hematoma and hemorrhage are used, the variable ratio of blood volume radius and radar wavelength can bring the measurements into the Mie and Rayleigh regions of the radar cross section. In these regions there is an oscillatory change in signal with blood volume size. For some frequencies there is an increase in signal with an increase in volume while in others there is a decrease.ConclusionsWhile radar can be used to monitor ACBH non-invasively and from a distance, the observed Mie region dependent oscillatory relation between blood volume size and wavelength requires further investigation. Classifiers, multifrequency algorithms or ultra-wide band radar are possible solutions that should be explored in the future. |
| Databáze: | OpenAIRE |
| Externí odkaz: |
|