Noncontrast magnetic resonance imaging versus ultrasonography for hepatocellular carcinoma surveillance (MIRACLE-HCC): study protocol for a prospective randomized trial

Table 1 Parameters of surveillance noncontrast MRI

Sequence	Scanner^a	Matrix Size	ST (mm)	Gap (mm)	TR (msec)	TE (msec)	FA (°)
Dual-echo T1-WI GRE	Magnetom (2D)	256 × 192	6	1.2	150	1.23/2.46	65
	Ingenia (3D)	278 × 256	2	0	3.2	1.15/2.30	10
	Discovery (3D)	320 × 256	2	0	3.9	1.12/2.35	12
	Prisma (3D)	320 × 256	2	0	9	1.34/2.73	9
T1-WI 3D GRE	Magnetom	256 × 192	2	0	2.54	0.95	13
	Ingenia	256 × 282	2	0	3.1	1.42	10
	Discovery	320 × 288	2	0	4.2	1.9	12
	Prisma	320 × 256	2	0	2.68	1.08	9
T2-WI with fat saturation	Magnetom	256 × 192	4	1	466	96	150
	Ingenia	320 × 212	4	1	758	80	90
	Discovery	320 × 256	4	1	2800	80	90
	Prisma	320 × 182	4	1	620	105	107
T2-WI with long TE	Magnetom	320 × 168	4	1	450	148	150
	Ingenia	320 × 186	4	1	522	150	90
	Discovery	320 × 224	4	1	840	150	90
	Prisma	320 × 208	4	1	600	153	98
DWI	Magnetom	128 × 96	6	1	5200	67	90
	Ingenia	128 × 128	5	1	4848	55	90
	Discovery	128 × 80	5	1	4800	51	90
	Prisma	140 × 112	5	1	5500	63	90

^aFull scanner names are Magnetom Trio Tim (Siemens), Ingenia CX (Philips), and Discovery MR750 (GE), and Prisma Fit (Siemens)
2D Two-dimensional, 3D Three-dimensional, ST Slice thickness, TR Repetition time, TE Echo time, FA Flip angle, GRE Gradient-recalled echo, DWI Diffusion-weighted imaging

ISSN: 1471-2407