Questions tagged [mri]
The mri tag has no usage guidance.
6
questions with no upvoted or accepted answers
1
vote
0
answers
217
views
Bring two Fourier transforms to same range to add them
I have Fourier transforms of two images which I wish to add (Basically I have an input Fourier transform which I mask, reconstruct the underlying image using an algorithm, and then try to replace the ...
- 71
1
vote
0
answers
38
views
Why do we not encode frequency in 3 dimensions in MRI?
If I understand correctly, to select a particular slice (of an object, during an MRI scan) that is orthogonal to the direction of the main magnetic field applied, we apply a magnetic field that varies ...
0
votes
0
answers
39
views
removing stripy artifact from fMRI
I have fMRI images, some of which have a stripy artifact that looks like a Gabor filter. Removing this kind of noise is not, to my knowledge, a standard part of any fMRI processing pipeline. I am ...
- 101
0
votes
0
answers
165
views
Bloch equations in MRI rotating field
I am trying to understand the workings of an MRI scanner and wanted to figure out how to simulate it by solving Bloch equations in the rotating frame of reference.
I have a small query regarding the ...
- 185
0
votes
0
answers
144
views
reconstruction of MRI signal
I have written a small simulator where I am trying to simulate the MRI signal generation process. I have a SINC RF Pulse to excite the spins and a readout gradient and k-space sampling during the ...
- 185
0
votes
0
answers
299
views
phase evolution of MRI signal during RF excitation
I am trying to compute the phase evolution of a proton spin in the presence of a slice selection gradient. I have the following properties for the slice selection gradient and the RF excitation:
<...
- 185