Table 2.

Number of volunteers who did and did not report PNS for each rise time and gradient coil. Maximum SR (4^th row) is the ratio between max ΔG (3^rd row) and Δt (2^nd row). For HG2z, only sensations that were reported as distinct from vibration were counted.

Gradient coil	HG1x			HG1y			HG2x				HG2y				HG2z
Rise-time Δt (µs)	160	248	400	160	248	400	120	168	260	424	120	168	260	424	120	168	260	424
Max ΔG used (mT/m)	80	80	80	80	80	80	85	85	80	80	85	85	80	80	85	85	82	82
Max SR (T/m/s)	500	323	200	500	323	200	708	506	308	189	708	506	308	189	708	506	315	193
Volunteers with PNS	8	4	2	1	0	0	13	10	2	0	1	0	0	0	4	1	0	1
Volunteers without PNS	2	6	8	9	10	10	1	4	12	14	13	14	14	14	10	13	14	13
Total volunteers	10			10			14				14				14