FDK_CUDA

This is a GPU implementation of the FDK algorithm for 3D circular cone beam data sets. It takes projection data as input, and returns the reconstruction.

Supported geometries: cone, cone_vec.

Note: cone_vec geometries that significantly deviate from a circular scanning geometry will likely lead to artifacts in the reconstruction.

Configuration options

name	type	description
cfg.ProjectionDataId	required	The astra_mex_data3d ID of the projection data.
cfg.ReconstructionDataId	required	The astra_mex_data3d ID of the reconstruction data. The content of this is overwritten.
cfg.FilterType	optional	Type of projection filter. Options: * ‘none’ * ‘ram-lak’ (default) * ‘shepp-logan’ * ‘cosine’ * ‘hamming’ * ‘hann’ * ‘tukey’ * ‘lanczos’ * ‘triangular’ * ‘gaussian’ * ‘barlett-hann’ * ‘blackman’ * ‘nuttall’ * ‘blackman-harris’ * ‘blackman-nuttall’ * ‘flat-top’ * ‘kaiser’ * ‘parzen’ * ‘projection’ (Fourier space filter, all projection directions share one filter) * ‘sinogram’ (Fourier space filter, every projection direction has its own filter) * ‘rprojection’ (real space filter, all projection directions share one filter) * ‘rsinogram’ (real space filter, every projection direction has its own filter)
cfg.FilterSinogramId	optional	The astra_mex_data2d ID of the filter data for ‘projection’, ‘sinogram’, ‘rprojection’ and ‘rsinogram’ filter types.
cfg.FilterParameter	optional	Parameter value for the ‘tukey’, ‘gaussian’, ‘blackman’ and ‘kaiser’ filter types.
cfg.FilterD	optional	“D” parameter value for ‘shepp-logan’, ‘cosine’, ‘hamming’ and ‘hann’ filter types.
cfg.option.ShortScan	optional	If enabled, do Parker weighting to support non-360-degree data. This needs an angle range of at least 180 degrees plus twice the cone angle. (default: false)
cfg.option.VoxelSuperSampling	optional	For the backward projection, VoxelSuperSampling^3 rays will be used. This should only be used if voxels in the reconstruction volume are larger than the detector pixels. (default: 1)
cfg.option.GPUindex	optional	The index (zero-based) of the GPU to use. (default: 0)