49274
49292
MR Angio Spinal Canal w/IVcon IMG15196
Machine Model: HVN Skyra, NT Verio
Generated:
2022-10-17 18:48:06
Load 0.15mL(mmol)/kg Gadavist - There are TWO injections for this protocol
1 *
2
3
Start power inject. @ 2 mL/sec & TWIST sequence at EXACT same time. Use 1/3 of total dose (0.15mL/kg Gadavist) for this portion
Plane Sagittal Sagittal Sagittal Oblique
Sequence T1 TSE LFOV localizer 3D T2 SPACE 3D T1 MRA Hi-res
Timing --- --- Pre-Contrast
Thickness - Spacing 5 mm - 1 mm 3 mm - 0 mm 0.5 mm - 0 mm
FOV approx. 450mm approx. 330mm approx. 320mm
4
Power Inj. Gadavist @ 2 mL/sec
5
6
7
Plane Sagittal Oblique Sagittal Oblique Axial (upper) Axial (lower)
Sequence TWIST 4D MRA 3D T1 MRA Hi-res T2* MEDIC T2* MEDIC
Timing Start TWIST sequence and power injection at EXACTLY the same time post-bolus delay determined by phase selection from TWIST images minutes seconds --- ---
Thickness - Spacing 1.2 mm - 0 mm 0.5 mm - 0 mm 3 mm - 1 mm 3 mm - 1 mm
FOV approx. 320mm approx. 320mm approx. 180mm approx. 180mm
Special Instructions:
* Cover from base of skull down for counting vertebral level
Indications: No indications found.
- load 0.15mL/kg Gadavist (1.5xnormal dose)
- inject 1/3 of dose at same exact time as beginning of TWIST sequence
- find timepoint of "late arterial" phase; ideally when aorta still bright, but pulmonary artery has mostly cleared of contrast
- use the timestamp from selected late arterial phase at bottom of TWIST image as the timing for the Hi-res MRA sequence
-for Hi-res MRA, inject remaining dose @ 2mL/sec then start sequence one second before hitting selected timepoint
#7
#6
#1,2
#3-5
All sagittal oblique sequences should be aligned w/ asc. & desc. aorta (candy cane) to minimize slices needed to cover aorta and spinal arteries
Use anterior body coil to boost SNR (can turn lengthwise)
Exam may be ordered on any spine part; adjust slices accordingly