Search Results - "Sica, Christopher T."

Bloch-based MRI system simulator considering realistic electromagnetic fields for calculation of signal, noise, and specific absorption rate by Cao, Zhipeng, Oh, Sukhoon, Sica, Christopher T., McGarrity, John M., Horan, Timothy, Luo, Wei, Collins, Christopher M.

“…Purpose To describe and introduce new software capable of accurately simulating MR signal, noise, and specific absorption rate (SAR) given arbitrary sample,…”
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Dynamic characteristics of T2‐weighted signal in calf muscles of peripheral artery disease during low‐intensity exercise by Li, Zhijun, Muller, Matthew D., Wang, Jianli, Sica, Christopher T., Karunanayaka, Prasanna, Sinoway, Lawrence I., Yang, Qing X.

“…Purpose To evaluate the dynamic characteristics of T2* ‐weighted signal change in exercising skeletal muscle of healthy subjects and peripheral artery disease…”
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The exercise pressor reflex and active O2 transport in peripheral arterial disease by Stavres, Jon, Sica, Christopher T., Blaha, Cheryl, Herr, Michael, Wang, Jianli, Pai, Samuel, Cauffman, Aimee, Vesek, Jeffrey, Yang, Qing X., Sinoway, Lawrence I.

“…It is unclear if the exaggerated exercise pressor reflex observed in peripheral arterial disease (PAD) patients facilitates Oxygen (O2) transport during…”
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An Electronic Aerosol Delivery System for Functional Magnetic Resonance Imaging by Hobkirk, Andréa L, Bitzer, Zachary, Goel, Reema, Sica, Christopher T, Livelsberger, Craig, Yingst, Jessica, Houser, Kenneth R, Rupprecht, Sebastian, Trushin, Neil, Karunanayaka, Prasanna, Foulds, Jonathan, Richie, John P, Spreen, Lauren, Hoglen, Brianna, Wang, Jianli, Elias, Ryan J, Yang, Qing X

“…Background: Public health concerns over the addictive potential of electronic cigarettes (e-cigs) have heightened in recent years. Brain function during e-cig…”
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Improvements of transmit efficiency and receive sensitivity with ultrahigh dielectric constant (uHDC) ceramics at 1.5 T and 3 T by Rupprecht, Sebastian, Sica, Christopher T., Chen, Wei, Lanagan, Michael T., Yang, Qing X.

“…Purpose Incorporating high dielectric constant (HDC) materials into radiofrequency (RF) coils has been shown to effectively improve RF coil performance at 7…”
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Agreement between multiparametric MRI (PIVOT), Doppler ultrasound, and near-infrared spectroscopy-based assessments of skeletal muscle oxygenation and perfusion by Luck, J. Carter, Sica, Christopher T., Blaha, Cheryl, Cauffman, Aimee, Vesek, Jeffrey, Eckenrode, John, Stavres, Jon

“…Skeletal muscle perfusion and oxygenation are commonly evaluated using Doppler ultrasound and near-infrared spectroscopy (NIRS) techniques. However, a recently…”
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Measurement of SAR-induced temperature increase in a phantom and in vivo with comparison to numerical simulation by Oh, Sukhoon, Ryu, Yeun-Chul, Carluccio, Giuseppe, Sica, Christopher T., Collins, Christopher M.

“…Purpose To compare numerically simulated and experimentally measured temperature increase due to specific energy absorption rate from radiofrequency fields…”
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Toward whole‐cortex enhancement with an ultrahigh dielectric constant helmet at 3T by Sica, Christopher T., Rupprecht, Sebastian, Hou, Ryan J., Lanagan, Matthew T., Gandji, Navid P., Lanagan, Michael T., Yang, Qing X.

“…Purpose To present a 3T brain imaging study using a conformal prototype helmet constructed with an ultra‐high dielectric constant (uHDC; εr ~ 1000) materials…”
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Diffusion tensor imaging indices of acute muscle damage are augmented after exercise in peripheral arterial disease by Stavres, Jon, Wang, Jianli, Sica, Christopher T., Blaha, Cheryl, Herr, Michael, Pai, Samuel, Cauffman, Aimee, Vesek, Jeffrey, Yang, Qing X., Sinoway, Lawrence I.

“…Purpose Although it is known that peripheral arterial disease (PAD) is associated with chronic myopathies, the acute muscular responses to exercise in this…”
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Displacement current distribution on a high dielectric constant helmet and its effect on RF field at 10.5 T (447 MHz) by Gandji, Navid P., Sica, Christopher T., Lanagan, Michael T., Woo, Myung‐Kyun, DelaBarre, Lance, Radder, Jerahmie, Zhang, Bei, Lattanzi, Riccardo, Adriany, Gregor, Ugurbil, Kamil, Yang, Qing X.

“…Purpose Investigating the designs and effects of high dielectric constant (HDC) materials in the shape of a conformal helmet on the enhancement of RF field and…”
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Renal medullary oxygenation decreases with lower body negative pressure in healthy young adults by Kim, Danielle Jin-Kwang, Drew, Rachel C, Sica, Christopher T, Yang, Qing X, Miller, Amanda J, Cui, Jian, Herr, Michael D, Sinoway, Lawrence I

“…One in three Americans suffer from kidney diseases such as chronic kidney disease, and one of the etiologies is suggested to be long-term renal hypoxia…”
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Complex difference constrained compressed sensing reconstruction for accelerated PRF thermometry with application to MRI-induced RF heating by Cao, Zhipeng, Oh, Sukhoon, Otazo, Ricardo, Sica, Christopher T., Griswold, Mark A., Collins, Christopher M.

“…Purpose Introduce a novel compressed sensing reconstruction method to accelerate proton resonance frequency shift temperature imaging for MRI‐induced…”
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Permittivity and performance of dielectric pads with sintered ceramic beads in MRI: early experiments and simulations at 3 T by Luo, Wei, Lanagan, Michael T., Sica, Christopher T., Ryu, YeunChul, Oh, Sukhoon, Ketterman, Matthew, Yang, Qing X., Collins, Christopher M.

“…Passive dielectric materials have been used to improve aspects of MRI by affecting the distribution of radiofrequency electromagnetic fields. Recently,…”
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Optimization of spiral-based pulse sequences for first-pass myocardial perfusion imaging by Salerno, Michael, Sica, Christopher T., Kramer, Christopher M., Meyer, Craig H.

“…Although spiral trajectories have multiple attractive features such as their isotropic resolution, acquisition efficiency, and robustness to motion, there has…”
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Fast conjugate phase image reconstruction based on a Chebyshev approximation to correct for B0 field inhomogeneity and concomitant gradients by Chen, Weitian, Sica, Christopher T., Meyer, Craig H.

“…Off‐resonance effects can cause image blurring in spiral scanning and various forms of image degradation in other MRI methods. Off‐resonance effects can be…”
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The exercise pressor reflex and active O 2 transport in peripheral arterial disease by Stavres, Jon, Sica, Christopher T, Blaha, Cheryl, Herr, Michael, Wang, Jianli, Pai, Samuel, Cauffman, Aimee, Vesek, Jeffrey, Yang, Qing X, Sinoway, Lawrence I

“…It is unclear if the exaggerated exercise pressor reflex observed in peripheral arterial disease (PAD) patients facilitates Oxygen (O ) transport during…”
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Concomitant gradient field effects in balanced steady-state free precession by Sica, Christopher T., Meyer, Craig H.

“…Linear magnetic field gradients spatially encode the image information in MRI. Concomitant gradients are undesired magnetic fields that accompany the desired…”
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Muscle oxygenation during dynamic plantar flexion exercise: combining BOLD MRI with traditional physiological measurements by Muller, Matthew D., Li, Zhijun, Sica, Christopher T., Luck, J. Carter, Gao, Zhaohui, Blaha, Cheryl A., Cauffman, Aimee E., Ross, Amanda J., Winkler, Nathan J.R., Herr, Michael D., Brandt, Kristen, Wang, Jianli, Gallagher, David C., Karunanayaka, Prasanna, Vesek, Jeffrey, Leuenberger, Urs A., Yang, Qing X., Sinoway, Lawrence I.

“…Blood‐oxygen‐level‐dependent magnetic resonance imaging (BOLD MRI) has the potential to quantify skeletal muscle oxygenation with high temporal and high…”
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Towards whole-cortex enhancement with a ultrahigh dielectric constant helmet at 3T by Sica, Christopher T., Rupprecht, Sebastian, Hou, Ryan J., Lanagan, Matthew T., Gandji, Navid P., Lanagan, Michael T., Yang, Qing X.

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Renal Medullary Oxygenation Decreases in a Dose‐Dependent Manner with Graded Lower Body Negative Pressure in Healthy Young Adults by Kim, Danielle Jin‐Kwang, Drew, Rachel C., Sica, Christopher T., Yang, Qing, Miller, Amanda, Cui, Jian, Sinoway, Lawrence I.

“…Background Increase in sympathetic nerve activity (SNA) evokes a renal vasoconstrictor response that is powerfully opposed by autoregulatory influences. In the…”
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