scholarly journals Investigating disparity organisation in the human early visual cortex with high resolution magnetic resonance imaging (7 Tesla)

2012 ◽  
Vol 12 (9) ◽  
pp. 41-41
Author(s):  
G. S. L. Coullon ◽  
R. M. Sanchez-Panchuelo ◽  
S. Francis ◽  
D. Schluppeck ◽  
A. J. Parker ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Visual Cortex ◽  
Magnetic Resonance ◽  
High Resolution ◽  
7 Tesla ◽  
Resonance Imaging ◽  
Early Visual Cortex

PD54-08 EX-VIVO EXPERIMENTAL 7 TESLA HIGH RESOLUTION MAGNETIC RESONANCE IMAGING - OF LOCALIZED PROSTATE CANCER

2020 ◽  
Vol 203 ◽  
pp. e1106-e1107
Author(s):  
Matthieu Durand* ◽  
Thomas Bessede ◽  
Patrick-Julien Treacy ◽  
Imad Bentellis ◽  
Idoia Corcuera-Solano ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Prostate Cancer ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Ex Vivo ◽  
Localized Prostate Cancer ◽  
7 Tesla ◽  
Resonance Imaging

scholarly journals Ex-vivo experimental 7 Tesla high resolution magnetic resonance imaging of localized prostate cancer

2020 ◽  
Vol 19 ◽  
pp. e585-e586
Author(s):  
M. Durand ◽  
T. Bessede ◽  
P-J. Treacy ◽  
I. Bentellis ◽  
I. Corcuera-Solano ◽  
...  
Keyword(s):  
Magnetic Resonance Imaging ◽  
Prostate Cancer ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Ex Vivo ◽  
Localized Prostate Cancer ◽  
7 Tesla ◽  
Resonance Imaging

scholarly journals Functional magnetic resonance imaging adaptation reveals a noncategorical representation of hue in early visual cortex

2015 ◽  
Vol 15 (6) ◽  
pp. 18 ◽  
Author(s):  
Andrew S. Persichetti ◽  
Sharon L. Thompson-Schill ◽  
Omar H. Butt ◽  
David H. Brainard ◽  
Geoffrey K. Aguirre
Keyword(s):  
Magnetic Resonance Imaging ◽  
Visual Cortex ◽  
Magnetic Resonance ◽  
Functional Magnetic Resonance Imaging ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Early Visual Cortex

Effects of Vision Restoration Training on Early Visual Cortex in Patients With Cerebral Blindness Investigated With Functional Magnetic Resonance Imaging

2011 ◽  
Vol 105 (2) ◽  
pp. 872-882 ◽  
Author(s):  
M. Raemaekers ◽  
D. P. Bergsma ◽  
R. J. A. van Wezel ◽  
G. J. van der Wildt ◽  
A. V. van den Berg
Keyword(s):  
Magnetic Resonance Imaging ◽  
Visual Cortex ◽  
Magnetic Resonance ◽  
Visual Field ◽  
Receptive Field ◽  
Field Size ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Retinotopic Maps ◽  
Early Visual Cortex

Cerebral blindness is a loss of vision as a result of postchiasmatic damage to the visual pathways. Parts of the lost visual field can be restored through training. However, the neuronal mechanisms through which training effects occur are still unclear. We therefore assessed training-induced changes in brain function in eight patients with cerebral blindness. Visual fields were measured with perimetry and retinotopic maps were acquired with functional magnetic resonance imaging (fMRI) before and after vision restoration training. We assessed differences in hemodynamic responses between sessions that represented changes in amplitudes of neural responses and changes in receptive field locations and sizes. Perimetry results showed highly varied visual field recovery with shifts of the central visual field border ranging between 1 and 7°. fMRI results showed that, although retinotopic maps were mostly stable over sessions, there was a small shift of receptive field locations toward a higher eccentricity after training in addition to increases in receptive field sizes. In patients with bilateral brain activation, these effects were stronger in the affected than in the intact hemisphere. Changes in receptive field size and location could account for limited visual field recovery (±1°), although it could not account for the large increases in visual field size that were observed in some patients. Furthermore, the retinotopic maps strongly matched perimetry measurements before training. These results are taken to indicate that local visual field enlargements are caused by receptive field changes in early visual cortex, whereas large-scale improvement cannot be explained by this mechanism.

Functional information from magnetic resonance imaging

1995 ◽  
Vol 53 ◽  
pp. 84-85
Author(s):  
Alan P. Koretsky ◽  
Afonso Costa e Silva ◽  
Yi-Jen Lin
Keyword(s):  
Magnetic Resonance Imaging ◽  
Magnetic Resonance ◽  
High Resolution ◽  
Cancer Biology ◽  
Imaging Modality ◽  
Magnetic Resonance Images ◽  
Great Success ◽  
Functional Information ◽  
Resonance Imaging ◽  
High Resolution Mri

Magnetic resonance imaging (MRI) has become established as an important imaging modality for the clinical management of disease. This is primarily due to the great tissue contrast inherent in magnetic resonance images of normal and diseased organs. Due to the wide availability of high field magnets and the ability to generate large and rapidly switched magnetic field gradients there is growing interest in applying high resolution MRI to obtain microscopic information. This symposium on MRI microscopy highlights new developments that are leading to increased resolution. The application of high resolution MRI to significant problems in developmental biology and cancer biology will illustrate the potential of these techniques.In combination with a growing interest in obtaining high resolution MRI there is also a growing interest in obtaining functional information from MRI. The great success of MRI in clinical applications is due to the inherent contrast obtained from different tissues leading to anatomical information.

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