Table 1.
MPI scan time comparison.
| Isotropic gradient strength | Native image resolution (Resovist tracer) | T2D for 2D projection (FFL) or single slice (FFP) (10 cm)2 | T3D,ffp for 3D image (FFP) (10 cm)3 | T3D,pr for 3D projection recon image (FFL) (10 cm)3 |
|---|---|---|---|---|
| 10 T/m | 1 mm | 3.6 s | 260 s | 560 s |
| 5 T/m | 2 mm | 0.89 s | 32 s | 70 s |
| 2.5 T/m | 4 mm | 0.22 s | 4.0 s | 8.8 s |
| 1.25 T/m | 8 mm | 0.06 s | 0.50 s | 1.1 s |
Best case imaging times [no partial field of view (pFOV) overlap] for slow field shift limited imaging using the International Commission on Non-Ionizing Radiation Protection (ICNIRP) limits of Smax = 20 T/s when imaging the human torso with a drive field amplitude of Bth = 7 mT (see Appendix 2), and Resovist tracer. We assume a (10 cm)3 FOV, which would be a reasonable FOV for imaging the human heart. Note that the SNR of a 3D PR image is nearly an order of magnitude better than a 3D image taken using an FFP imager.