Table 2.
Liver Protocol, Injection of Gd-EOB-DTPA
| Description | T1w In/Out | T1w Pre-C | M Bolus Tracking, Injection Rate 1 mL/s |
||||
|---|---|---|---|---|---|---|---|
| Arterial Portal Venous Transitional | T2w Coronal | T2w FatSat | DWI b= 0, 50, 500 | Hepato- Specific |
|||
| Sequence | 3D SPGR (2D SPGR) | 3D SPGR | SSFSE | FRFSE | EPI | 3D SPGR | |
| Plane | axial | Axial | Axial | Coronal | Axial | Axial | Axial |
| Slice thickness (mm) | 4–5 (7) | 4–5 | 4–5 | 5 (4) | 7 | 7 | 4–5 |
| Gap (mm) | −2 to −2.5 (1) | −2 to −2.5 | −2 to −2.5 | 0 | 1 | 1 | −2 to −2.5 |
| Fat suppression | Dixon/IR | – | Spectr. | (Spectr.) | Dixon/IR | ||
| TE1/TE2 (ms) (out/in) | 1.1/2.1 (2.2/4.4) | 1.4–2 | 1.4–2 | 100 | 102 | Min (o90) | 1.4–2 |
| TR | 4.5 (210) | 4.5 | 4.5 | – | 2500 | 6000 (4000) | 4.5 |
| Flip angle | 12 (90) | 12 | 12 | 90 | 90 | 90 | 12 |
| ETL | – | – | – | – | 13 | – | – |
| NEX | <1 (1) | <1 | <1 | 0.5 | 2 (3) | 1 (12) | o1 |
| Phase enc. steps | 192(128) | 192 | 192 | 224(256) | 224(192) | 128 | 192 |
| Frequency steps | 320 (256) | 300 | 300 | 320 (256) | 320 | 128 | 300 |
| Breath | BH | BH | BH | BH | Trig. | BH/Trig. | BH |
| Notes | Peak+5s dual arterial | Peak+60s | Peak+180s | Peak+20 min | |||
Example of data for 3 T magnets; numbers in brackets are for 1.5 T. T2-weighted sequences are acquired after the administration of Gd-EOB-DTPA. Gd-EOB-DTPA is injected at 1 mL/s. BH, breath-hold; Dixon, Dixon technique; enc., encoding; ETL, echo train length; FatSat, fat saturated; FSE, fast spin echo; IR, inversion recovery; In/out, in-phase and out-of-phase; NEX, number of excitations; Peak, aortic peak detected with bolus tracking; pre-CM, before contrast administration; Spectr., chemically selective fat suppression; SSFSE, half Fourier single-shot FSE; Trig, respiratory triggering; w, weighted.