MRI NECK ANGIO (TOF)

MRI Neck Angiography (TOF) Overview

Magnetic Resonance Angiography (MRA) of the neck with Time-of-Flight (TOF) imaging is a diagnostic examination of the neck's internal structures capable of showing the carotid and vertebral arteries. Blood vessels are generally visualized using strong magnetic fields and radio waves in most cases without having to use contrast agents.  

What is MRI Neck Angio (TOF)? 

MRI Neck Angiography (TOF) is specialized neck arteries imaging that uses the blood circulation for intricate and detailed visualization. It is preferred in cases of kidney dysfunction or contrast allergy because most cases do not require contrast administration. TOF imaging enhances the signal of blood in motion and suppresses the surrounding static tissues. 

Types of MRI Neck Angio 

• Non-contrast TOF MRA: focuses only on Flow MRA imaging.  
• CE-MRA: detailed imaging of the vasculature using gadolinium-based contrast. 
• Phase Contrast MRA: quantifies the velocity and direction of blood flow. 

List of Parameters Considered During MRI Neck Angio (TOF)

• Patency of blood vessels such as carotid or vertebral arteries. 
• Stenosis Degree Indicators 
• Risks associated with plaque build-up 
• Aneurysm or malformation presence 
• Abnormal blood flow patterns 
• Any plaque or thrombosis buildup 

Reasons for Taking an MRI Neck Angio (TOF)

• Assessing for carotid artery disease 
• Diagnosing and follow-up on aneurysm cases 
• Examining vascular anomalies 
• Advanced planning prior to carotid endarterectomy or stenting 
• Assess the risk of stroke 

When and Who Needs an MRI Neck Angio (TOF)? 

Indications: 

• Carotid artery stenosis being considered 
• Acute stroke or transient ischemic attack (TIA) 
• Vascular aneurysms or mal formations 
• Evaluation of arterial dissection or thrombosis 
• Known vascular pathology under follow-up 
• Prior surgery planning evaluation for vascular surgery 

Patient Demographics: 

• Patient with cerebrovascular insufficiency symptoms (e.g. weak, dizzy, vision changes) 
• History of hypertension, smoking, and atherosclerosis  
• Post-stroke or TIA patients who require vascular check-ups. 
• Family history of aneurysms or other vascular diseases. 

Benefits of Taking the Test

• Non-invasive procedure with no exposure to radiation 
• In most cases, imaging of vascular structures is done without the use of contrast material 
• Identification of cerebrovascular illnesses at an early stage 
• Vital for foresight of stroke as well as planning interventions and treatment for vessels 

Illnesses Diagnosed with MRI Neck Angio (TOF)

• Atherosclerosis of carotid arteries 
• Vertebral artery stenosis 
• Arterial dissection and aneurysms 
• Arteriovenous malformation or AVM 
• Embolic or thrombotic occlusion 

Preparing for MRI Neck Angio (TOF)

• Clothing should be loose and comfy 
• Inform the technician about any implants or pregnancy 
• Take off all metallic jewellery and electronic accessories, if any 
• If contrast is involved, fasting is advised 

Pre-requisites 

• If MRA with contrast is needed, no history of allergy to the contrast agent is permitted 
• Prescribed medication due to anxiety or claustrophobia before the test if needed 

Best Time to Take the MRI Neck Angio (TOF) 

• Utilized in scheduling to prevent delays and prepare ahead of time. 

Eligibility  

• Patients with incompatible metal implants and/or pacemakers are the only safety issue. 

Procedure for Taking an MRI Neck Angio (TOF)  

• Patient is placed on an MRI table in a supine position.  
• A coil dedicated to neck imaging is fitted on the neck.  
• Pictures are taken using magnetic fields and radio waves within the MRI scanner.  
• The procedure is completed within 30 to 45 minutes.  
• Contrast material can be administered for enhanced imaging if necessary. 

Caution Before Taking the Test  

• Radiologist needs to be made aware of pregnancy, disorders of the kidney, or any metal implants.  
• The patient needs to avoid any movement to increase clarity of the image throughout the scan.