Results 71 to 80 of about 93,892 (190)

Functional mapping of the human visual cortex with intravoxel incoherent motion MRI.

PLoS ONE, 2015
Functional imaging with intravoxel incoherent motion (IVIM) magnetic resonance imaging (MRI) is demonstrated. Images were acquired at 3 Tesla using a standard Stejskal-Tanner diffusion-weighted echo-planar imaging sequence with multiple b-values. Cerebro-
Christian Federau, Kieran O'Brien, Adrien Birbaumer, Reto Meuli, Patric Hagmann, Philippe Maeder   +5 more
doaj   +1 more source

Sub-Millimeter T2 Weighted fMRI at 7 T: Comparison of 3D-GRASE and 2D SE-EPI

Frontiers in Neuroscience, 2015
Functional magnetic resonance imaging (fMRI) allows studying human brain function non-invasively up to the spatial resolution of cortical columns and layers.
Valentin G. Kemper, Federico eDe Martino, Federico eDe Martino, An T. Vu, Benedikt A. Poser, David A. Feinberg, David A. Feinberg, Rainer eGoebel, Essa eYacoub   +8 more
doaj   +1 more source

Assessment of spectral ghost artifacts in echo-planar spectroscopic micro-imaging with flyback readout

Scientific Reports
In this work, echo-planar spectroscopic imaging (EPSI) with flyback readout gradient-echo train was implemented in a preclinical MR scanner. The aim of this study is to visualize and quantify the ghost spectral lines produced by two, three and four ...
Jan Weis, Magor Babos, Sergio Estrada, Ram Kumar Selvaraju   +3 more
doaj   +1 more source

Diffusion-weighted magnetic resonance imaging in bladder cancer: comparison of readout-segmented and single-shot EPI techniques

Cancer Imaging, 2019
Background To evaluate whether readout-segment echo-planar imaging (RS-EPI) can provide better image quality in assessing bladder cancer than single-shot echo-planar imaging (SS-EPI) and to compare quantitative imaging parameters derived from both ...
Haihu Chen, Luguang Chen, Fang Liu, Jianping Lu, Chuanliang Xu, Li Wang   +5 more
doaj   +1 more source

Dynamic echo planar imaging of exercised muscle

Magnetic Resonance Imaging, 1995
Echo planar imaging was used to record dynamic changes in tissue transverse relaxation rates (delta R2) in the anterior tibialis muscle during dorsi-flexion exercise and recovery. Using a single spin-echo technique to calculate the change in relaxation rate produced by the exercise a time resolution of 4 s was achieved for each measurement of delta R2.
R P, Kennan, T B, Price, J C, Gore
openaire   +2 more sources

Beyond the otoscope: an imaging review of congenital cholesteatoma

Insights into Imaging
Congenital cholesteatoma (CC) is a non-neoplastic lesion of keratin debris lined by epithelium found in the temporal bone. It is the lesser-known sibling of the acquired cholesteatoma and may be classified as congenital middle ear cholesteatoma and ...
Guillaume Vangrinsven, Anja Bernaerts, Filip Deckers, Joost van Dinther, Andrzej Zarowski, Bert De Foer   +5 more
doaj   +1 more source

Functional MRI with active, fully implanted, deep brain stimulation systems: Safety and experimental confounds [PDF]

, 2007
We investigated safety issues and potential experimental confounds when performing functional magnetic resonance imaging (fMRI) investigations in human subjects with fully implanted, active, deep brain stimulation (DBS) systems.
Allen, P.J., Carmichael, D.W., Lemieux, L., Limousin-Dowsey, P., Pinto, S., Thobois, S., Thornton, J.S., Yousry, T.   +7 more
core  

Ghost peaks simulation and reduction in high-resolution echo-planar spectroscopic imaging with flyback readout

Scientific Reports
The undesirable aspect of echo-planar spectroscopic imaging (EPSI) is the occurrence of Nyquist ghost spectral lines. This phenomenon reduces the intensity of each true spectral line due to energy transfer into one or more ghost peaks.
Jan Weis, Magor Babos, Ram Kumar Selvaraju   +2 more
doaj   +1 more source

Quantification of breast biopsy clip marker artifact on routine breast MRI sequences: a phantom study

European Radiology Experimental
Background To investigate the artifact sizes of four common breast clip-markers on a standard breast magnetic resonance imaging (MRI) protocol in an in vitro phantom model.
Christian Kremser, Leonhard Gruber, Matthias Dietzel, Birgit Amort, Wolfram Santner, Martin Daniaux   +5 more
doaj   +1 more source

Balanced multi-shot EPI for accelerated Cartesian MRF: An alternative to spiral MRF

, 2018
The main purpose of this study is to show that a highly accelerated Cartesian MRF scheme using a multi-shot EPI readout (i.e. multi-shot EPI-MRF) can produce good quality multi-parametric maps such as T1, T2 and proton density (PD) in a sufficiently ...
Benjamin, Arnold Julian Vinoj, Davies, Mike E., Golbabaee, Mohammad, Gómez, Pedro A., Marshall, Ian, Menzel, Marion I., Sprenger, Tim   +6 more
core