Figure 2.

Reconstruction of the Shepp‐Logan phantom by all four codes from the IRT‐degridded k‐space. The slight improvement due to using an analytic deapodization instead of a computed one can be seen in the lack of artificially generated phase in the TRON result. RMS errors relative to the true phantom image for IRT, gpuNUFFT, BART, and TRON were 0.1143, 0.1016, 0.1143, and 0.0814, respectively. The difference images are unscaled