12245
12261
MR Brain MRA Head/Neck Dissec IVcon wo/w IMG12941
Machine Model: Agnostic
Generated:
2025-05-13 15:44:26
1 *
2 **
3
4
5 ***
Plane Axial Axial Axial Sagittal Axial
Sequence DWI (B=0,1000) T2 FS FLAIR TSE T2 TSE T1 TSE MRA 3D TOF
Timing --- Pre-Contrast --- Pre-Contrast Pre-Contrast
Thickness - Spacing 4 mm - 1 mm 4 mm - 1 mm 4 mm - 1 mm 4 mm - 1 mm 0.8 mm - -20% (overlap)
FOV approx. 200mm approx. 200mm approx. 200mm approx. 220mm approx. 200mm
Recenter and localize at neck
6
7
8 ****
Gad.; Power Inj. @ 2ml/sec; Fluoro Trigger
Plane Axial Axial Coronal
Sequence T1 FS TSE T2 FS TSE 3D T1 MRA (mask)
Timing Pre-Contrast Pre-Contrast Pre-Contrast
Thickness - Spacing 5 mm - 5 mm - 1 mm - 20%
FOV 160mm 160mm approx. 300mm
9 ****
10 ****
11
sp 1
sp 2
Plane Coronal Coronal Axial
sp 1
sp 2
Sequence 3D T1 MRA (arterial) 3D T1 MRA (venous) 3D SWI
sp 1
sp 2
Timing Post-Contrast Post-Contrast Post-Contrast
sp 1
sp 2
Thickness - Spacing 1 mm - 20% 1 mm - 20% 2 mm - mm
sp 1
sp 2
FOV approx. 300mm approx. 300mm approx. 200mm
sp 1
sp 2
Special Instructions:

* Ensure phase enc. direction is A>P
** Must be at least 2 concatenations/covers/acquisitions
*** Cover from top of corpus callosum and include entire foramen magnum (to include PICA)
**** A>P - Cover carotid and vertebral arteries; H>F - cover from origin of great vessels to skull base
Indications: carotid artery dissection , neurological symptoms of infarction following trauma , vertebral artery dissection
Post-Processing


MRA Head/Brain - two series; remove all irrelevant tissue and produce two radial series with 18 images (one every 10 degrees); one rotating around the vertical axis and one around the horizontal axis

MRA Carotids/Neck – Three series; 1: Origin of Aortic Arch to include bilateral carotid, vertebral arteries. 2: Only include RCC from origin of Aortic Arch. 3: Only LCC from origin of Aortic Arch.  Remove all irrelevant tissue and produce radial series with 18 images (one every 10 degrees); rotating around the vertical axis

#1-3,11
#4
#5
#6,7
#8-10
Align series #1-3,11 with subcallosal plane
#5
Essential stroke sequences placed at beginning in case patient fails exam
#1-3,11
Angle with subcallosal plane. If more coverage is needed add slabs not slices
#5
Include Carotid arch up to skull base.
#8-10
#8-10
#6,7
#6,7