Results 271 to 280 of about 172,142 (304)
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Experimental validation of predicted temperature rises in tissue-mimicking materials
Physics in Medicine and Biology, 1993Increasingly, it is recognised that diagnostic ultrasound is capable of causing temperature rises sufficient to damage tissue. Predictions of this heating are often based on simplified models of both the in vivo conditions and the relevant physical effects.
D R, Bacon, A, Shaw
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Polyvinyl Alcohol Cryogel – Tissue Mimicking Material for Vascular Optical Elastography
Biomedical Optics, 2006We present a tissue-mimicking material for vascular optical elastography: polyvinyl alcohol (PVA) cryogel. Its optical and elastic properties are tunable and in the range that is relevant for biological tissue simulation. We report measurements of the elastic modulus, and of the optical properties, derived from quantitative analysis of optical ...
Van Soest, G. +2 more
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Tissue-mimicking phantom materials for narrowband and ultrawideband microwave applications
Physics in Medicine and Biology, 2005We propose and characterize oil-in-gelatin dispersions that approximate the dispersive dielectric properties of a variety of human soft tissues over the microwave frequency range from 500 MHz to 20 GHz. Different tissues are mimicked by selection of an appropriate concentration of oil.
Mariya, Lazebnik +3 more
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Prospective tissue-mimicking materials for use in NMR imaging phantoms
Magnetic Resonance Imaging, 1982Water-based proteinaceous gels, which--with appropriate additives--are stable with time and possess a high melting point, have been used as base materials in ultrasonically tissue-mimicking materials. In the present work, versions of these gels having various concentrations of glycerol and graphite particles were studied regarding their NMR T1 and T2 ...
E L, Madsen, G D, Fullerton
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A reusable perfusion supporting tissue‐mimicking material for ultrasound hyperthermia phantoms
Medical Physics, 1990A new ultrasonically and thermodynamically tissue‐mimicking material is reported. The material is well suited for use in phantoms for testing ultrasound hyperthermia systems or related predictive models. Controlled convective heat transfer effects, mimicking to some extent perfusive heat transfer in tissues, can be instituted in the material with ...
Zagebski, JA +5 more
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Temperature Measurements in Tissue-Mimicking Material during HIFU Exposure
AIP Conference Proceedings, 2009Cavitation in high intensity focused ultrasound (HIFU) procedures can yield unpredictable results, particularly when the same location is targeted for more than several seconds. To study this effect, temperature rise was measured in tissue mimicking material (TMM) during HIFU exposures.
Subha Maruvada +4 more
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Temperature Rise in Tissue Mimicking Material During HIFU Procedures
ASME 2007 Summer Bioengineering Conference, 2007High Intensity Focused Ultrasound (HIFU) has shown considerable promise as a minimally-invasive technique for various therapeutic applications such as tumor ablation and vessel cauterization. The efficacies of these HIFU procedures depend on various operational parameters such as total acoustic power, pulse duration and transducer dimensions.
Subhashish Dasgupta +3 more
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Tissue mimicking material and image artifacts in intravascular elastography
1996 IEEE Ultrasonics Symposium. Proceedings, 2002Intravascular ultrasound is being investigated as a tool for imaging the local elasticity of atherosclerotic vessels: obtaining images of the compression modulus is the ultimate goal. In practice, radial strain is used to depict local hardness: this simplification causes artifacts that must be understood or corrected.
Céspedes, EI +4 more
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Tissue mimicking materials in image-guided needle-based interventions: A review
Materials Science and Engineering: C, 2018Image-guided interventions are widely employed in clinical medicine, which brings significant revolution in healthcare in recent years. However, it is impossible for medical trainees to experience the image-guided interventions physically in patients due to the lack of certificated skills.
Pan Li, Zhiyong Yang, Shan Jiang
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NMR tissue-mimicking materials and phantoms
Magnetic Resonance Imaging, 1982E.L. Madsen, G.D. Fullerton
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