A three plane localiser must be taken in the beginning to localise and plan the sequences. Localisers are normally less than 25sec. T1 weighted low resolution scans.
Plan a second T2 three-plane localizer on the first localizer. Plan the sagittal localizer on the axial image and make it parallel to the optic nerve. Plan the coronal localizer perpendicular to the right and left optic nerve, as shown in the image. Finally, plan the axial localizer in the coronal image and make it parallel to the right and left optic nerve.
Plan the axial slices on the sagittal plane and position the block parallel to the genu and splenium of the corpus callosum. Verify the planning block in the other two planes and ensure that an appropriate angle is maintained in the coronal plane, making it perpendicular to the line of the midline of the brain and the 4th ventricle. Ensure that the number of slices is sufficient to cover the entire brain from the vertex to the line of the foramen magnum.
TR 3000-4000 |
TE 100-120 |
SLICE 5MM |
FLIP 130-150 |
PHASE R>L |
MATRIX 320X320 |
FOV 210-230 |
GAP 10% |
NEX(AVRAGE) 2 |
Plan the coronal slices on the axial plane and angle the planning block parallel to the right (RT) and left (LT) optic nerve. Check the planning block in the other two planes. An appropriate angle must be given in the sagittal plane (perpendicular to the optic nerve). Ensure that the slices are sufficient to cover the entire orbits from the eye lenses to the optic chiasm.”
TR 4000-5000 |
TE 110 |
FLIP 160 |
NEX 3 |
SLICE 3MM |
MATRIX 256×256 |
FOV 150-170 |
PHASE R>L |
GAP 10% |
TI 150 |
Plan the coronal slices on the axial plane and angle the planning block parallel to the right (RT) and left (LT) optic nerve. Check the planning block in the other two planes. An appropriate angle must be given in the sagittal plane (perpendicular to the optic nerve). Ensure that the slices are sufficient to cover the entire orbits from the eye lenses to the optic chiasm.”
TR 400-600 |
TE 15-25 |
SLICE 3MM |
FLIP 150 |
PHASE R>L |
MATRIX 256X256 |
FOV 150×170 |
GAP 10% |
NEX(AVRAGE) 3 |
Plan the axial slices on the coronal plane and angle the planning block parallel to the right (RT) and left (LT) optic nerve. Check the planning block in the other two planes. Provide an appropriate angle in the sagittal plane (parallel to the optic nerve). Ensure that the slices are sufficient to cover the entire orbits from the superior border to the inferior border.
TR 4000-5000 |
TE 110 |
FLIP 160 |
NEX 3 |
SLICE 3MM |
MATRIX 256×256 |
FOV 150-170 |
PHASE R>L |
GAP 10% |
TI 150 |
Plan the axial slices on the coronal plane and angle the planning block parallel to the right (RT) and left (LT) optic nerve. Check the planning block in the other two planes. Provide an appropriate angle in the sagittal plane (parallel to the optic nerve). Ensure that the slices are sufficient to cover the entire orbits from the superior border to the inferior border.
TR 4000-6000 |
TE 68 |
FLIP 180 |
NXA 1 2 |
SLICE 3MM |
MATRIX 192X192 |
FOV 180-200 |
PHASE R>L |
GAP 10% |
B VALUE 50 |
Plan the sagittal slices on the axial plane and angle the planning block parallel to the optic nerve. Check the planning block in the other two planes. An appropriate angle must be given in the coronal plane, parallel to the line along the right (RT) superior and RT inferior rectus muscles. Ensure that the slices are sufficient to cover the right (RT) orbit.
TR 3000-4000 |
TE 100-120 |
SLICE 3 MM |
FLIP 130-150 |
PHASE A>P |
MATRIX 256X256 |
FOV 150-170 |
GAP 10% |
NEX(AVRAGE) 3 |
Plan the sagittal slices on the axial plane and angle the planning block parallel to the optic nerve. Check the planning block in the other two planes. An appropriate angle must be given in the coronal plane, parallel to the line along the left (LT) superior and LT inferior rectus muscles. Ensure that the slices are sufficient to cover the LT orbit.
TR 3000-4000 |
TE 100-120 |
SLICE 3 MM |
FLIP 130-150 |
PHASE A>P |
MATRIX 256X256 |
FOV 150-170 |
GAP 10% |
NEX(AVRAGE) 3 |
Post-contrast scanning will only be performed if any pathology is observed in the pre-contrast scans