Volumetric magnetic resonance-guided high-intensity focused ultrasound ablation of uterine fibroids through abdominal scars: the impact of a scar patch on therapeutic efficacy and adverse effects

Table 1 Magnetic resonance imaging sequence parameters

	Screening, planning & follow-up	Scar & scar patch visualization	SI change in the subcutaneous fat	Multiplane MR thermometry	Immediate follow-up^a
MR Sequence	T2W 3D TSE with DRIVE	T2W 3D FFE	Fat-saturated T2W TSE	RF-spoiled segmented EPI	Fat-saturated T1W THRIVE
TR (ms)	1300	10	11366	37	5.5
TE (ms)	130	6	70	19.5	2.7
Flip Angle	90	15	130	19	10
Slice Thickness (mm)	1.25	1	4	7	1.5
Matrix	224*218	208*208	200*188	160*100	150*150
FOV ((mm)	250*250	220*220	320*320	400*250	250*250
Number of slices	160	25	36	6	90
Acquisition time (s)	190	47	46	2.9	173
Imaging plane	Sagittal	Coronal	Sagittal	Multi-plane	Coronal
Fat suppression	N/A	N/A	STIR	ProSet	STIR
Additional information	SENSE 2	SENSE 2	SENSE 2	121-binomial water-selective excitation	SENSE 2

FFE fast field echo, T1W T1-weighted imaging, T2W T2-weighted imaging, SENSE sensitivity encoding, EPI echo planar imaging, THRIVE T1W High resolution isotropic volume examination, TR repetition time, TE echo time, FOV field of view, ProSet Principle of Selective Excitation Technique, STIR short tau inversion recovery, SI signal intensity
^aGd-DO3A-butrol (0.1 mmol/kg; Gadovist, Bayer Schering Pharma, Germany) was used for contrast enhancement

ISSN: 2050-5736