MRI Cervical Spine
Indications for MRI cervical spine
- Cervicocranial arterial dissection
- Arterio-venous malformation
- Vertebrobasilar syndrome
- Injury to the carotid artery
- Aneurysm
- Tumours
Contraindications
- Any electrically, magnetically or mechanically activated implant (e.g. cardiac pacemaker, insulin pump biostimulator, neurostimulator, cochlear implant, and hearing aids)
- Intracranial aneurysm clips (unless made of titanium)
- Pregnancy (risk vs benefit ratio to be assessed)
- Ferromagnetic surgical clips or staples
- Metallic foreign body in the eye
- Metal shrapnel or bullet
Patient preparation for MRI Cervical Spine
- A satisfactory written consent form must be taken from the patient before entering the scanner room
- Ask the patient to remove all metal objects including keys, coins, wallet, cards with magnetic strips, jewellery, hearing aid and hairpins
- If possible provide a chaperone for claustrophobic patients (e.g. relative or staff )
- Contrast injection risk and benefits must be explained to the patient before the scan
- Gadolinium should only be given to the patient if GFR is > 30
- Offer earplugs or headphones, possibly with music for extra comfort
- Explain the procedure to the patient
- Instruct the patient to keep still
- Note the weight of the patient
Positioning for MRI Cervical Spine
- Head first supine
- Position the head in the head and neck coil and immobilise with cushions
- Give cushions under the legs for extra comfort
- Centre the laser beam localiser over the mid neck (2.5cm below the chin in chin-down position)
Recommended MRI Cervical Spine Protocols and Planning
MRI Cervical Spine localiser
A three-plane localizer must be taken at the beginning to localize and plan the sequences. Localizers are normally less than 25 seconds, and they consist of T1-weighted low-resolution scans.
T2 tse sagittal 3mm
Plan the sagittal slices on the coronal plane; angle the positioning block parallel to the spinal cord. Check the positioning block in the other two planes. An appropriate angle must be given in the axial plane (parallel to the line along the center of the vertebral body through the length of the spinous process). Check the positioning block in the sagittal plane; the field of view (FOV) must be big enough to cover the entire cervical spine from the pons down to T3 (normally 260mm). The slices must be sufficient to cover the spine from the lateral border of the right transverse process to the lateral border of the left transverse process. A saturation band must be placed over the neck (in front of the esophagus) in the sagittal plane. This is to avoid swallowing and pulsation artifacts over the spinal area. The phase direction should be head to foot to avoid motion artifacts from the neck.
Parameters
|
TR 3000-4000 |
TE 100-120 |
SLICE 3 MM |
FLIP 130-150 |
PHASE H>F |
MATRIX 256X256 |
FOV 280-290 |
GAP 10% |
NEX(AVRAGE) 2 |
T1 tse sagittal 3mm
Plan the sagittal slices on the coronal plane; angle the positioning block parallel to the spinal cord. Check the positioning block in the other two planes. An appropriate angle must be given in the axial plane (parallel to the line along the center of the vertebral body through the length of the spinous process). Check the positioning block in the sagittal plane; the field of view (FOV) must be big enough to cover the entire cervical spine from the pons down to T3 (normally 260mm). The slices must be sufficient to cover the spine from the lateral border of the right transverse process to the lateral border of the left transverse process. A saturation band must be placed over the neck (in front of the esophagus) in the sagittal plane. This is to avoid swallowing and pulsation artifacts over the spinal area. The phase direction should be head to foot to avoid motion artifacts from the neck.
Parameters
|
TR 400-600 |
TE 15-25 |
SLICE 3 MM |
FLIP 150 |
PHASE H>F |
MATRIX 256X256 |
FOV 280-290 |
GAP 10% |
NEX(AVRAGE) 2 |
T2 TSE STIR sagittal 3mm
Plan the sagittal slices on the coronal plane; angle the positioning block parallel to the spinal cord. Check the positioning block in the other two planes. An appropriate angle must be given in the axial plane (parallel to the line along the center of the vertebral body through the length of the spinous process). Check the positioning block in the sagittal plane; the field of view (FOV) must be big enough to cover the entire cervical spine from the pons down to T3 (normally 260mm). The slices must be sufficient to cover the spine from the lateral border of the right transverse process to the lateral border of the left transverse process. A saturation band must be placed over the neck (in front of the esophagus) in the sagittal plane. This is to avoid swallowing and pulsation artifacts over the spinal area. The phase direction should be head to foot to avoid motion artifacts from the neck.
Parameters
|
TR 7000-9000 |
TE 110 |
FLIP 150 |
NEX 2 |
SLICE 3 MM |
MATRIX 256X256 |
FOV 280 |
PHASE H>F |
GAP 10% |
TI 150 |
T2 TSE Axial 3mm
Plan the axial slices on the sagittal plane and angle the position block perpendicular to the spinal cord. Additional blocks must be placed if there is a disc prolapse at any other level (e.g., T2, T3).. An appropriate angle must be given in the coronal plane, parallel to the intervertebral disc space. The slices should be sufficient to cover the entire C spine from C2 to T1. A saturation band must be placed over the neck (in front of the esophagus) in the sagittal plane. This is done to avoid swallowing and vascular pulsation artifacts over the spinal area.
Parameters
|
TR 3000-4000 |
TE 90-120 |
FLIP 150 |
NEX 2 |
SLICE 3 MM |
MATRIX 256X256 |
FOV 180-200 |
PHASE A>P |
GAP 10% |
oversample 100% |
T1 TSE Axial 3mm
Plan the axial slices on the sagittal plane and angle the position block perpendicular to the spinal cord. Additional blocks must be placed if there is a disc prolapse at any other level (e.g., T2, T3).. An appropriate angle must be given in the coronal plane, parallel to the intervertebral disc space. The slices should be sufficient to cover the entire C spine from C2 to T1. A saturation band must be placed over the neck (in front of the esophagus) in the sagittal plane. This is done to avoid swallowing and vascular pulsation artifacts over the spinal area.
Parameters
|
TR 400-500 |
TE 15-20 |
FLIP 150 |
NEX 2 |
SLICE 3 MM |
MATRIX 256X256 |
FOV 180-200 |
PHASE A>P |
GAP 10% |
oversample 100% |
Indications For contrast enhanced cervical spine scan
- Evaluation or monitoring of tumour of the CNS or meninges
- Monitoring of previous spinal surgery
- Suspected spine lesions (e.g. bone mets)
- Spinal cord tumour
- Syringomyelia
Use T1 TSE fat-saturated axial and sagittal sequences after the administration of IV gadolinium DTPA injection (copy the planning outlined above). The document below provides access to the recommended dosage of gadolinium DTPA injection, as advised by the manufacturer.