ETRI Journal

Electronics and Telecommunications Research Institute (한국전자통신연구원)
권호 표지

2D Image Construction from Low Resolution Response of a New Non-invasive Measurement for Medical Application

  • Received : 2004.02.03
  • Published : 2005.08.31
Download PDF
⟨ Previous Next ⟩

Abstract

This paper presents an application of digital signal processing to data acquired by the radio imaging method (RIM) that was adopted to measure moisture distribution inside the human body. RIM was originally developed for the mining industry; we are applying the method to a biomedical measurement because of its simplicity, economy, and safety. When a two-dimensional image was constructed from the measured data, the method provided insufficient resolution because the wavelength of the measurement medium, a weak electromagnetic wave in a VHF band, was longer than human tissues. We built and measured a phantom, a model simulating the human body, consisting of two water tanks representing large internal organs. A digital equalizer was applied to the measured values as a weight function, and images were reconstructed that corresponded to the original shape of the two water tanks. As a result, a two-dimensional image containing two individual peaks corresponding to the original two small water tanks was constructed. The result suggests the method was applicable to biomedical measurement by the assistance of digital signal processing. This technique may be applicable to home-based medical care and other situations in which safety, simplicity, and economy are important.

Keywords

References

  1. New Frontiers in Medical Device Technology Rosen, A.;Rosen, H.D.
  2. Medical Applications of Microwave Imaging Larsen, L.L.F.;Jacobi, J.H.
  3. Proc. IEEE v.60 Nonionizing Electromagnetic Wave Effects in Biological Materials and Systems Johnson, C.C.;Guy, A.W.
  4. Bulletin of the Electrotechnical Laboratory v.45 Noninvasive Measurement of Temperature Profiles Inside Dielectric Materials Miyakawa, M.
  5. Exploration Geophysics v.24 The Study of Diffusion Effects in RIM Tomographic Imaging Rogers, G.;Brandt, L.;Young, J.;Kot, J.
  6. AAPG Bulletin v.68 Radio Imaging Method (RIM) Used to Map Coal Seam Thickness within Developed Longwall Panels Stolarczyk, L.G.;Fry, R.C.;Lloyd, T.W.
  7. IEEE Trans Industry Applications v.28 Definition Imaging of an Orebody with the Radio Imaging Method (RIM) Stolarczyk, L.G.
  8. Exploration Geophysics v.23 Base Metal Application of the Radio Imaging Method: Current Status and Case Studies Thomson, S.;Young, J.;Sheard, N.
  9. Butsuri-Tansa v.47 Australian Development of Tomographic Radio Imaging as a New Tool in Mining Geophysics Young, J.;Rogers, G.;Thomson, S.;Neil, M.
  10. Proc. XI Int. Conf. Electric Bio-Impedance Preliminary Study of Non-Contact Bio-Impedance Measurement by RIM Hieda, I.
  11. Proc. Congress of Int. Ergonomics Assoc. v.5 Relation of Resolution and Distance from Antenna in Medical and Nursing Application of Radio Imaging Method (RIM) Hieda, I.;Takahashi, A.
  12. Medical Engineering & Physics v.26 Basic Characteristics of the Radio Imaging Method for Biomedical Application Hieda, I.;Nam, K.C.;Takahashi, A.
  13. Proc. XI Int. Conf. Electric Bio-Impedance Impedance Tomography and Spectroscopy: What Can and What Will We See? Brown, B.H.
  14. Electrical Impedance Tomography Webster, J.G.(ed.)
  15. Bioimpedance and Bioelectricity Basics Grimnes, S.;Martinsen, O.G.
  16. Transmission Line Transformers Sevick, J.
  17. Theory of Digital Signal Processing 2 (Japanese) Yahagi, T.
  18. GNU Octave website
  19. Computational Electrodynamics: The Finite-Difference Time-Domain Method Taflove, A.;Hangness, S.C.
  20. Physiological Measurement v.22 no.1 Magnetic Induction Tomography: Hardware for Multifrequency Measurements in Biological Tissue Scharfetty, H.;Lackner, H.K.;Rosell, J.
  21. Physiological Measurement v.21 Magnetic Induction Tomography: Experimental Realization Korjenevsky, A.;Cheripenin, V.;Sapetsky, S.