1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
|
function backProj = astra_create_backprojection_cuda(sinogramData, proj_geom, vol_geom)
%--------------------------------------------------------------------------
% backProj = astra_create_backprojection_cuda(sinogramData, proj_geom, vol_geom)
%
% Creates a CUDA-based simple backprojection
%
% sinogramData: 2D matrix with projections stored row-based
% theta: projection angles, length should be equal to the number of rows in
% sinogramData
% reconstructionSize: vector with length 2 with the row and column count of
% the reconstruction image
% backProj: 2D back projection from sinogram data
%--------------------------------------------------------------------------
%--------------------------------------------------------------------------
% This file is part of the ASTRA Toolbox
%
% Copyright: 2010-2021, imec Vision Lab, University of Antwerp
% 2014-2021, CWI, Amsterdam
% License: Open Source under GPLv3
% Contact: astra@astra-toolbox.com
% Website: http://www.astra-toolbox.com/
%--------------------------------------------------------------------------
recon_id = astra_mex_data2d('create', '-vol', vol_geom, 0);
sinogram_id = astra_mex_data2d('create', '-sino', proj_geom, sinogramData);
cfg = astra_struct('BP_CUDA');
cfg.ProjectionDataId = sinogram_id;
cfg.ReconstructionDataId = recon_id;
alg_id = astra_mex_algorithm('create', cfg);
astra_mex_algorithm('run', alg_id);
backProj = astra_mex_data2d('get', recon_id);
astra_mex_data2d('delete', sinogram_id);
astra_mex_data2d('delete', recon_id);
astra_mex_algorithm('delete', alg_id);
end
|
