Functional Magnetic Resonance Image-Guided Surgery of Tumors in or near the Primary Visual Cortex

1999 ◽  
Vol 73 (1-4) ◽  
pp. 31-36 ◽  
Author(s):  
Michael Schulder ◽  
Andrei Holodny ◽  
Wen-Ching Liu ◽  
Allison Gray ◽  
Gudrun Lange ◽  
...  
Keyword(s):  
Visual Cortex ◽  
Magnetic Resonance ◽  
Primary Visual Cortex ◽  
Magnetic Resonance Image ◽  
Image Guided Surgery ◽  
Functional Magnetic Resonance ◽  
Functional Magnetic Resonance Image ◽  
Guided Surgery ◽  
Image Guided

The basis of orientation decoding in human primary visual cortex: fine- or coarse-scale biases?

2015 ◽  
Vol 113 (1) ◽  
pp. 1-3 ◽  
Author(s):  
Ryan T. Maloney
Keyword(s):  
Magnetic Resonance Imaging ◽  
Visual Cortex ◽  
Magnetic Resonance ◽  
Receptive Field ◽  
Primary Visual Cortex ◽  
Functional Magnetic Resonance ◽  
Resonance Imaging ◽  
Coarse Scale ◽  
Multivariate Pattern ◽  
Open Question

Orientation signals in human primary visual cortex (V1) can be reliably decoded from the multivariate pattern of activity as measured with functional magnetic resonance imaging (fMRI). The precise underlying source of these decoded signals (whether by orientation biases at a fine or coarse scale in cortex) remains a matter of some controversy, however. Freeman and colleagues ( J Neurosci 33: 19695–19703, 2013) recently showed that the accuracy of decoding of spiral patterns in V1 can be predicted by a voxel's preferred spatial position (the population receptive field) and its coarse orientation preference, suggesting that coarse-scale biases are sufficient for orientation decoding. Whether they are also necessary for decoding remains an open question, and one with implications for the broader interpretation of multivariate decoding results in fMRI studies.

Utilizing Segmented MRI Data in Image-Guided Surgery

1997 ◽  
Vol 11 (08) ◽  
pp. 1367-1397 ◽  
Author(s):  
W. E. L. Grimson ◽  
G. J. Ettinger ◽  
T. Kapur ◽  
M. E. Leventon ◽  
W. M. Wells III ◽  
...  
Keyword(s):  
Clinical Practice ◽  
Magnetic Resonance ◽  
Diagnostic Tool ◽  
Magnetic Resonance Images ◽  
Image Guided Surgery ◽  
Current Clinical Practice ◽  
Surgical Guidance ◽  
Guided Surgery ◽  
Image Guided

While the role and utility of Magnetic Resonance Images as a diagnostic tool are well established in current clinical practice, there are a number of emerging medical arenas in which MRI can play an equally important role. In this article, we consider the problem of image-guided surgery, and provide an overview of a series of techniques that we have recently developed in order to automatically utilize MRI-based anatomical reconstructions for surgical guidance and navigation.

Sign in / Sign up

Export Citation Format

Share Document