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Estimation of optimal frequencies for electrical impedance-based diagnosis of osteoporosis based on numerical modeling of cancellous bone tissue Cover

Estimation of optimal frequencies for electrical impedance-based diagnosis of osteoporosis based on numerical modeling of cancellous bone tissue

Journal of Electrical Bioimpedance
Volume 7 (2016): Issue 1 (January 2016)
By: Reza Goodarzi and  Mehrdad Saviz  
Open Access
|Dec 2016

Figures & Tables

Fig.1

Relative permittivity (top curves) and conductivity (S/m) (bottom curves) of the bone marrow. In the figure above, maximum and minimum permittivity and conductivity limits of bone marrow are shown [9].
Relative permittivity (top curves) and conductivity (S/m) (bottom curves) of the bone marrow. In the figure above, maximum and minimum permittivity and conductivity limits of bone marrow are shown [9].

Fig.2

Permittivity (top curves) and conductivity (S/m) (bottom curves) for the cortical bone [10].
Permittivity (top curves) and conductivity (S/m) (bottom curves) for the cortical bone [10].

Fig.3

The obtained model of the bone tissue in CST software. Density in the figure (a) is 7% and in the figure (b) is 0.3% [11].
The obtained model of the bone tissue in CST software. Density in the figure (a) is 7% and in the figure (b) is 0.3% [11].

Fig.4

Comparison of the permittivity and conductivity (S/m) obtained from the results of our model and properties of cancellous bone extracted from [10]. Dotted and dashed curves are model results corresponding to maximum and minimum properties of the bone marrow tissue, compared with experimental results of [10] which is shown with solid line.
Comparison of the permittivity and conductivity (S/m) obtained from the results of our model and properties of cancellous bone extracted from [10]. Dotted and dashed curves are model results corresponding to maximum and minimum properties of the bone marrow tissue, compared with experimental results of [10] which is shown with solid line.

Fig.5

The percentage of the admittance change according to a 20% change of bone density from 1kHz to 1GHz.
The percentage of the admittance change according to a 20% change of bone density from 1kHz to 1GHz.

Admittance (Y=1/Z) for 10 percent bone density

FrequencyAdmittance (mS)
(Hz)Real PartImaginary Part
1K0.93400.0017487
5K0.93400.005356
10K0.93400.007956
50K0.93400.0138023
100K0.93400.0219348
500K0.93690.0450018
1M0.93990.0615236
5M0.96040.1330
10M1.20030.2274
50M1.34901.0398
100M1.45171.9395
500M1.62518.8706
1G2.065916.3413

Admittance (Y=1/Z) for 30 percent bone density

FrequencyAdmittance (mS)
(Hz)Real PartImaginary Part
1K0.70490.0016069
5K0.70490.004280
10K0.70490.0062451
50K0.70490.0116188
100K0.70490.0182412
500K0.71150.048474
1M0.71810.0604440
5M0.76520.1226
10M0.95610.1963
50M1.08180.8582
100M1.17401.5945
500M1.35627.0695
1G1.871712.9255
DOI: https://doi.org/10.5617/jeb.3944 | Journal eISSN: 1891-5469
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Language: English
Page range: 68 - 71
Submitted on: Oct 23, 2016
Published on: Dec 27, 2016
Published by: University of Oslo
In partnership with: Paradigm Publishing Services
Publication frequency: 1 issue per year
Keywords:
osteoporosis,
impedance meter,
osteoporosis,
bone density,
modeling
Related subjects:
Engineering,
Bioengineering and biomedical engineering,
Biomedical electronics,
Life sciences,
Biophysics,
Medicine,
Biomedical engineering,
Physics,
Spectroscopy and metrology

© 2016 Reza Goodarzi, Mehrdad Saviz, published by University of Oslo
This work is licensed under the Creative Commons Attribution-NonCommercial-NoDerivatives 3.0 License.

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