Biomedical Applications of Electromagnetic Engineering

Lin, James C.

doi:10.1201/9780203026021.ch17

Cited by 10 publications

(1 citation statement)

References 124 publications

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“…Although with different prevalence in different regions, radio frequency (RF) electromagnetic fields (EMF) are one of the major modalities for therapeutic tissue heating in particular in treating muscle tissues and joints [DeLisa et al, 2004;Lin, 2006;Knight and Draper, 2008]. For medical applications, European EMF spectral management allocated certain frequencies such as 27.12 MHz (short-wave), 433.92 MHz (decimeter-wave) and 2.45 GHz (microwave).…”

Section: Introductionmentioning

confidence: 99%

Exposure of non‐target tissues in medical diathermy

Leitgeb¹,

Omerspahic²,

Niedermayr³

2009

Bioelectromagnetics

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With different prevalence in different regions, radio frequency (RF) electromagnetic fields (EMF) are widely used for therapeutic tissue heating. Although short-wave diathermy (27.12 MHz) is the most popular treatment modality, quantitative data on patient's exposure have been lacking. By numerical simulation with the numerical anatomical model NORMAN, intracorporal distributions of specific absorption rates (SAR) were investigated for different treatment scenarios and applicators. Quantitative data are provided for exposures of target treatment areas as well as for vulnerable regions such as the eye lenses, central nervous system, and testes. Different applicators and distances were investigated. Capacitive and inductive applicators exhibit quite a different heating efficiency. It could be shown that for the same output power therapeutic heat deposition can vary by almost one order of magnitude. By mimicking therapist's practice to use patient's heat perception as an indicator for output power setting, numerical data were elaborated demonstrating that muscle tissue exposures may be several times higher for inductive than for capacitive applicators. Presented quantitative data serve as a guide for power adjustment preventing relevant overexposures without compromising therapy; they also provide a basis for estimating target tissue heat load and developing therapeutic guidelines.

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Section: Introductionmentioning

confidence: 99%

Exposure of non‐target tissues in medical diathermy

Leitgeb¹,

Omerspahic²,

Niedermayr³

2009

Bioelectromagnetics

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Biomedical Applications

2016

From ER to ET

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Microwave Thermoelastic Tomography and Imaging

Lin

Advances in Electromagnetic Fields in Living Systems

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Microwave thermoelastic imaging uses microwave-pulse-induced thermoelastic pressure waves to form planar or tomographic images. Since the generation and detection of thermoelastic pressure waves depends on dielectric permittivity, specific heat, thermal expansion, and acoustic properties of tissue, microwave thermoelastic imaging possesses the characteristic features of a duel-modality imaging system. The unique attributes of the high contrast offered by microwave absorption and the fine spatial resolution furnished by ultrasound, are being explored to provide an imaging modality for noninvasive imaging characterization of tissues, especially for early detection of breast cancer. This chapter describes the research being conducted in developing microwave thermoelastic tomography (MTT) and imaging for medical diagnosis. It discusses the science of thermoelastic wave generation and propagation in biological tissues; the design of prototype microwave thermoelastic tomographic imaging (MTTI) systems; and the reconstruction of tomographic images using filtered-back projection algorithms; as well as the performance of prototype microwave thermoelastic tomographic systems in phantom models and human subjects.

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Biomedical Applications of Electromagnetic Engineering

Cited by 10 publications

References 124 publications

Exposure of non‐target tissues in medical diathermy

Exposure of non‐target tissues in medical diathermy

Biomedical Applications

Microwave Thermoelastic Tomography and Imaging

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