Changes: new tools: nlmeans, tensorflow, nufftbase, calc, psf calc: access some mathematical functions from the command-line nlmean: non-local means filter tensorflow: load and apply Tensorflow graph nufftbase: compute Fourier transform of basis used in nuFFT psf: compute PSF nufft: various new options to control behavior nufft: basis and weights nufft: zero and low memory modes nufft: use -x for image dimensions sim: Bloch-McConnell simulations traj: rotation of Cartesian trajectories traj: RAGA trajectories reconet: MPI support reconet: tensorflow graph support reconet: export graph for visualization pics: mpi and multi-GPU support pics: add shared-img-dims option to pics pics: add option to specify FISTA pics: preconditioning nlinv: add option to specifiy non-Cart image size phantom: BRAIN geometry phantom: 64ch sensitivities phantom: ellipsoid simulation phantom: support for generic geometries mobafit: add basis to mobafit mobafit: add IR and IR LL to mobafit mobafit: magnitude fitting mobafit: scaling and initial values mobafit: minimum and maximum bounds mobafit: GPU support nrmse: add option for scientific notation moba: Export and ksp coils in moba moba: Various new options estdelay: support for looping version: show tensorflow and MPI support signal: Spin-Echo signal model scripts/shell: kspace_precond.sh: Script to compute k-space preconditioner scripts/python: bart_tf.py: Export tensorflow graphs for use with BART scripts/python: bart.py: Print stdout and stderr output from bart call scripts/python: splines_from_svg.py: extract spline control points from SVG files library/geom: Brain geometry library/misc: better backtraces library/num: md_ravel_index, md_select_strides, md_zsmin2, md_unravel library/num: library for complex-valued Gaussians library/num: cuda kernels: zdot, zfsq2, zfftmod_3d, zsmin, compress, decompress library/num: cuda batch kernels: xpay, axpy, dot_bat library/num: cuda kernels: (z)add_unfold, (z)mul(c)_unfold, (z)fmac(c)_unfold library/num: md_nlmeans(2), md_nlmeans_distance(2) library/num: library for MPI sync, broadcast, reductions library/num: double precision bessel function library/num: special functions: sinc, sincf, jinc library/num: library for virtual pointers library/num: time-ordered matrix exponentials: mat_to_exp library/num: functions for adjoint sensitivity analysis library/num: functions for quadratures: trapezoidal, simpson library/num: configure fftw wisdom/measure via environment variable library/simu: Bloch McConnell simulations library/simu: Spin Echo signal model library/linops: linop: flip library/nlops: nlops: zphsr and zabs library/nn: nlops: ardioid, siglog, igaussian library/network: tensorflow networks library/noncart: nufft inverse gridding on GPU library/noncart: RAGA trajectories library/iter: weighted least-squares prox function library/iter: batched conjgrad library/iter: multiple regularizations for primal-dual general: webasm support general: BART_ prefix to environment variables general: generic loop interface to bart general: basic MPI support general: OpenMPI and GPU for gridding general: zero-overhead mode for nuFFT general: performance improvements general: many GPU improvements, unified GPU initialization built: FORTRAN and PNG options built: LTO integration test built: OMP=0 CUDA=1 compilation built: more unit and integration tests many other bug fixes and improvements