Results 241 to 250 of about 118,809 (292)
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A perfused tissue phantom for ultrasound hyperthermia
IEEE Transactions on Biomedical Engineering, 1990A perfused tissue phantom, developed as a tool for analyzing the performance of ultrasound hyperthermia applicators, was investigated. The phantom, consisting of a fixed porcine kidney with thermocouples placed throughout the tissue, was perfused with degassed water by a variable flow rate pump.
P J Benkeser, L A Frizzell, S A Goss
exaly +3 more sources
MR relaxation properties of tissue-mimicking phantoms
Ultrasonics, 2022High quality tissue-mimicking phantoms (TMPs) have a critical role in the preclinical testing of emerging modalities for diagnosis and therapy. TMPs capable of accurately mimicking real tissue in Magnetic Resonance guided Focused Ultrasound (MRgFUS) applications should be fabricated with precise T1 and T2 relaxation times.
Antoniou, Anastasia +1 more
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Tissue mimicking materials for ultrasound phantoms
Medical Physics, 1978Up until now, no material has been found whose attenuation and speed of sound properties not only mimic those of human soft tissue, but are controllable in magnitude. We have discovered such a material in the form of water‐based pharmaceutical gels containing uniform distributions of graphite powder and known concentrations of alcohol. The magnitude of
E L, Madsen +3 more
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Development of a tissue‐equivalent phantom for diaphanography
Medical Physics, 1986A phantom is proposed for quality control and calibration of instruments used for transillumination of the breast for early detection of cancer. A container is filled with a material having optical properties very similar to those of breast tissue, and internal objects are viewed by transmitted light.
J, Linford +4 more
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Ultrasound heating in a tissue-bone phantom
Ultrasound in Medicine & Biology, 1994Temperature rise generated by focused ultrasound beams was tested on semipermanent tissue-bone phantoms. The phantoms were capped (sealed) plastic hollow cylindrical containers filled with tissue-mimicking material (TMM), in which were imbedded 25 microns diameter copper-constantan thermocouples (TC) and a piece of compact human or cow bone.
T P, O'Neill, A J, Winkler, J, Wu
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Raman tomography of tissue phantoms and bone tissue
SPIE Proceedings, 2008We report tomographic reconstruction of objects located several millimeters below the surface of highly scattering media. For this purpose we adapted proven software developed for fluorescence tomography with and without the use of spatial priors1. For this first demonstration we acquired Raman spectra using an existing ring/disk fiber optic probe with
Matthew V. Schulmerich +7 more
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Light depolarization by tissue and phantoms
SPIE Proceedings, 2006The characteristic lengths of light linear and circular depolarization in turbid media are analyzed from random walk of vector photons. Analytical expressions are derived for polydisperse scatterers. The characteristic lengths of light depolarization computed using this model explained the different light depolarization behaviors observed ...
M. Xu, R. R. Alfano
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Tissue equivalent material for hand phantoms
Physics in Medicine and Biology, 2007We suggest that to best reproduce the interaction between a handheld wireless transceiver and the hand holding it, the dielectric properties of the hand phantom should be similar to those of the palm of the hand. The proposed target permittivity and conductivity values are presented and tabulated at a number of frequencies of interest.
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