MR data for Exercise 7
The MR data for exercise 7 is contained in the
file MRdata.mat. The data can be downloaded
here. It contains the raw MR data used
for the reconstruction. Note that the file is
very large (28 MBytes), so it might take some
time to download.
The EPI MR raw data can be loaded into matlab using the commands:
load('MRdata.mat');
% Dimensions of raw are slices, coils, y, x:
[nslc, ncoil, ny, nx] = size(raw);
For each slice and coil,
raw is a 128 x 128 matrix of complex measurements, S=S_x+i
S_y, where the signals S_x and S_y are proportional to the
components of the total transverse magnetization in orthogonal
directions x and y. Each line raw(slc,coil,Cy,:) is measured on a
positive or negative gradient lobe (moving right or left in
k-space).
The text for exercise 7: MR scanning, can be found here (pdf file)
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