Search Results - "Hand, Jeffrey W."

Specific absorption rate and temperature in neonate models resulting from exposure to a 7T head coil by Malik, Shaihan J., Hand, Jeffrey W., Satnarine, Ryan, Price, Anthony N., Hajnal, Joseph V.

“…Purpose To investigate safe limits for neonatal imaging using a 7T head coil, including both specific absorption rate (SAR) and temperature predictions…”
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Evaluation of specific absorption rate and heating in children exposed to a 7T MRI head coil by Malik, Shaihan J, Hand, Jeffrey W, Carmichael, David W, Hajnal, Joseph V

“…To evaluate specific absorption rate (SAR) and temperature distributions resulting from pediatric exposure to a 7T head coil. Exposure from a 297-MHz birdcage…”
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Comparison between simulated decoupling regimes for specific absorption rate prediction in parallel transmit MRI by Beqiri, Arian, Hand, Jeffrey W., Hajnal, Joseph V., Malik, Shaihan J.

“…Purpose The use of electromagnetic (EM) modeling is critical for specific absorption rate (SAR) characterization in parallel transmission MRI. Radiofrequency…”
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Specific absorption rate in neonates undergoing magnetic resonance procedures at 1.5T and 3T by Malik, Shaihan J, Beqiri, Arian, Price, Anthony N, Teixeira, Jose Nuno, Hand, Jeffrey W, Hajnal, Joseph V

“…MRI is finding increased clinical use in neonatal populations; the extent to which electromagnetic models used for quantification of specific absorption rate…”
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Thermal modelling using discrete vasculature for thermal therapy: A review by Kok, H Petra, Gellermann, Johanna, van den Berg, Cornelis A T, Stauffer, Paul R, Hand, Jeffrey W, Crezee, Johannes

“…Reliable temperature information during clinical hyperthermia and thermal ablation is essential for adequate treatment control, but conventional temperature…”
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Specific absorption rate in neonates undergoing magnetic resonance procedures at 1.5 T and 3 T by Malik, Shaihan J., Beqiri, Arian, Price, Anthony N., Teixeira, Jose Nuno, Hand, Jeffrey W., Hajnal, Joseph V.

“…MRI is finding increased clinical use in neonatal populations; the extent to which electromagnetic models used for quantification of specific absorption rate…”
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Rapporteur report: Basics and technology and metrology and standards by Hand, Jeffrey W.

“…The first and second sessions of the Workshop focussed on the basics of ultrasound and infrasound, their applications in both industry and medicine, and…”
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Mechanical testing of human cardiac tissue: some implications for MRI safety by Edwards, Maria-Benedicta, Draper, Edward R C, Hand, Jeffrey W, Taylor, Kenneth M, Young, Ian R

“…The effects of aging on tissue strength and its ability to withstand forces associated with MRI have not been investigated. This study aimed to determine the…”
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Assessment of magnetic field (4.7 T) induced forces on prosthetic heart valves and annuloplasty rings by Edwards, Maria-Benedicta, Ordidge, Roger J., Hand, Jeffrey W., Taylor, Kenneth M., Young, Ian R.

“…Purpose To assess the magnetic field interactions on 11 heart valve prostheses and 12 annuloplasty rings subjected to a 4.7 T MR system. Materials and Methods…”
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Electromagnetic and thermal modeling of SAR and temperature fields in tissue due to an RF decoupling coil by Hand, Jeffrey W., Lau, Raymond W., Lagendijk, Jan J.W., Ling, Junxiao, Burl, Mike, Young, Ian R.

“…The finite difference time domain method is used to calculate the specific absorption rate (SAR) due to a butterfly surface coil in a realistic tissue model of…”
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Modeling and observation of temperature changes in vivo using MRI by Young, I R, Hand, J W, Oatridge, A, Prior, M V

“…Models have been developed for the signal changes occurring in human peripheral muscle after thermal stress for some methods of measuring temperature in vivo…”
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Translational and rotational forces on heart valve prostheses subjected ex vivo to a 4.7-T MR system by Edwards, Maria-Benedicta, Ordidge, Roger J., Thomas, David L., Hand, Jeffrey W., Taylor, Kenneth M.

“…Purpose To assess the magnetic field interactions on 60 heart valve prostheses subjected to a 4.7 T MR system. It addresses the question of whether heart…”
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Experimental verification of numerically predicted electric field distributions produced by a radiofrequency coil by Taylor, H C, Burl, M, Hand, J W

“…There are safety issues regarding energy deposition within tissues due to radiofrequency fields used in some magnetic resonance (MR) procedures. Procedures…”
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Design and calibration of electric field probes in the range 10-120 MHz by Taylor, H C, Burl, M, Hand, J W

“…In view of potential thermal hazards, there is a need to determine the specific absorption rate (SAR) distributions associated with radiofrequency coils used…”
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Observation by MR imaging of in vivo temperature changes induced by radio frequency hyperthermia by Hall, A S, Prior, M V, Hand, J W, Young, I R, Dickinson, R J

“…Volunteers have undergone radio frequency hyperthermia in a magnetic resonance (MR) imaging system to investigate which of several possible MR parameters would…”
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Biomedical applications of acoustic radiation force based on somatosensory reception by Gavrilov, Leonid R., Hand, Jeffrey W., Tsirulnikov, Efim M.

“…We have previously shown that short pulses of focused ultrasound may be used to stimulate locally receptor neural structures and thereby induce sensations that…”
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SAR distributions in interstitial microwave antenna arrays with a single dipole displacement by Clibbon, K.L., McCowen, A., Hand, J.W.

“…The use of interstitial microwave antenna array hyperthermia (IMAAH) as a treatment for cancer, in conjunction with radiation therapy and chemotherapy, has…”
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A theoretical assessment of the relative performance of spherical phased arrays for ultrasound surgery by Gavrilov, L.R., Hand, J.W.

“…Computer modeling of spherical-section phased arrays for ultrasound surgery (tissue ablation) is described. The influence on performance of the number of…”
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SAR and Temperature Changes in the Leg Due to an RF Decoupling Coil at Frequencies Between 64 and 213 MHz by Hand, Jeffrey W., Lagendijk, Jan J.W., Hajnal, Joseph V., Lau, Raymond W., Young, Ian R.

“…Specific absorption rate (SAR) due to a butterfly surface coil in a realistic model of the leg was calculated for frequencies 64 ≤ ν ≤ 213 MHz. The resulting…”
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A method of reducing grating lobes associated with an ultrasound linear phased array intended for transrectal thermotherapy by Gavrilov, L.R., Hand, J.W., Abel, P., Cain, C.A.

“…Some practical aspects of planar linear ultrasound phased arrays for transrectal thermotherapy of prostate diseases are discussed. Several regimens for driving…”
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