User profiles for Jean Tkach

jean tkach

Associate Professor, Cincinnati Children's Hospital Medical Center
Verified email at cchmc.org
Cited by 7755

Neurostimulation systems for deep brain stimulation: In vitro evaluation of magnetic resonance imaging–related heating at 1.5 tesla

…, JA Nyenhuis, G Hrdlicka, J Tkach… - Journal of Magnetic …, 2002 - Wiley Online Library
Purpose To assess magnetic resonance imaging (MRI)‐related heating for a neurostimulation
system (Activa® Tremor Control System, Medtronic, Minneapolis, MN) used for chronic …

Evaluation of specific absorption rate as a dosimeter of MRI‐related implant heating

KB Baker, JA Tkach, JA Nyenhuis… - Journal of Magnetic …, 2004 - Wiley Online Library
Purpose To compare the magnetic resonance imaging (MRI)‐related heating per unit of
whole body averaged specific absorption rate (SAR) of a conductive implant exposed to two …

Permanent neurological deficit related to magnetic resonance imaging in a patient with implanted deep brain stimulation electrodes for Parkinson's disease: case …

JM Henderson, J Tkach, M Phillips, K Baker… - …, 2005 - journals.lww.com
OBJECTIVE AND IMPORTANCE: Deep brain stimulation (DBS) is an accepted treatment for
patients with Parkinson’s disease refractory to medication. The efficacy of this therapy has …

Neurostimulation system used for deep brain stimulation (DBS): MR safety issues and implications of failing to follow safety recommendations

…, KB Baker, AD Sharan, J Nyenhuis, J Tkach… - Investigative …, 2004 - journals.lww.com
The use of magnetic resonance imaging (MRI) in patients with neurostimulation systems used
for deep brain stimulation requires the utmost care, and no individual should undergo an …

Abnormalities in diffusion tensor imaging of the uncinate fasciculus relate to reduced memory in temporal lobe epilepsy

B Diehl, RM Busch, JS Duncan, Z Piao, J Tkach… - …, 2008 - Wiley Online Library
Aims: To use Diffusion Tensor Imaging (DTI) to explore structural integrity and connectivity
of the uncinate fasciculus (UF) in patients with temporal lobe epilepsy (TLE) and its …

Greater corticolimbic activation to high-calorie food cues after eating in obese vs. normal-weight adults

A Dimitropoulos, J Tkach, A Ho, J Kennedy - Appetite, 2012 - Elsevier
The goal of this research is to identify the neural response to rewarding food cues before
and after eating in overweight/obese (OB) and normal-weight (NW) adults. Based on the …

MR imaging-related heating of deep brain stimulation electrodes: in vitro study

…, AR Rezai, PM Ruggieri, JA Tkach… - American journal …, 2002 - Am Soc Neuroradiology
BACKGROUND AND PURPOSE: Recent work has shown a potential for excessive heating
of deep brain stimulation electrodes during MR imaging. This in vitro study investigates the …

Steady-state free precession imaging in the presence of motion: application for improved visualization of the cerebrospinal fluid.

EM Haacke, PA Wielopolski, JA Tkach, MT Modic - Radiology, 1990 - pubs.rsna.org
The authors discuss the appropriate FISP (fast imaging with steady-state precession)
sequence structure to maintain constant phase at the radio-frequency pulse in the presence of …

Parkinson Disease: Pattern of Functional MR Imaging Activation during Deep Brain Stimulation of Subthalamic Nucleus—Initial Experience1

MD Phillips, KB Baker, MJ Lowe, JA Tkach, SE Cooper… - Radiology, 2006 - pubs.rsna.org
Purpose: To prospectively determine the pattern of functional magnetic resonance (MR)
imaging activation at 3 T produced by deep brain stimulation (DBS) of subthalamic nucleus (STN…

Retrospective respiratory self‐gating and removal of bulk motion in pulmonary UTE MRI of neonates and adults

NS Higano, AD Hahn, JA Tkach, X Cao… - Magnetic resonance …, 2017 - Wiley Online Library
Purpose To implement pulmonary three‐dimensional (3D) radial ultrashort echo‐time (UTE)
MRI in non‐sedated, free‐breathing neonates and adults with retrospective motion tracking …