Table 1 Overview of the different applied MR sequences for RFA performed at 0.2 T and 1.5 T
0.2 T | 1.5 T | |
|---|---|---|
MR planning examination: verification of lesion size and localisation | T1w SE sequence | HASTE |
T2w fast SE sequence | T1w in- and opp phase | |
T1w Flash 2D | ||
T2w TSE | ||
DWI (EPI) (T1w VIBE) | ||
Patient preparation | i.v. analgesia and sedation | |
s.c. local anaesthetics (Xylocaine 0.9%, AstraZeneca, Wedel, Germany) | ||
RF applicator placement: fluoroscopic sequences | fast T1w or T2*w GE sequences | Either T1w or T2w BEAT_IRTT (SSFP) |
Interventional imaging | T2w fast SE sequences | T1w Flash 2D |
T2w TSE, T2w FISP | ||
DWI | ||
Breath-hold gated EPI sequence | ||
Postinterventional imaging | T1w SE | T1w |
T2w fast SE | T2w | |
T1w post contrast VIBE (0.1 mmol gadobutrol per kilogramm; Gadovist, Bayer Vital GmbH, Leverkusen, Germany) |