MRI ORBITS - WITHOUT CONTRAST

MRI Orbits – Without Contrast is a kind of imaging study which is non-invasive and is used to visualize the eyes (orbits), optic nerves, extraocular muscles and other closely related structures. The examination provides soft tissue images of the orbits with a high degree of accuracy. Thus, it is helpful in diagnosing a wide variety of lesions of the orbits, brain and eye sockets including some neurological ones without the administration of contrast. 

What are an MRI Orbits Without Contrast Scan? 

This is a magnetic resonance imaging scan that yields images of the orbital structures without the administration of gadolinium-based contrast substances. MRI Orbits Without Contrast utilizes natural tissue contrast and has advantages in respect to the anatomical and pathological features of the eye and optic pathways.

• Change degrees of internal angles of the optic lobes with the eye globes 
• Separate or associated adjacent signal boundaries negatively affect time-space absorbed signal transverse  
• Strong or weak orbital muscular deep fascia symmetry enhancement 
• Deducing sharp blunt injuries, swelling, and inappropriately cross-linked stopping rules are performed 

• For the possible reasons for patients suffering unexpected vision problems.  
• To confirm or exclude the diagnosis of optic neuritis.  
• For detecting tumours, infections, or inflammation within the orbit.  
• For assessing trauma to the bony orbit and adjacent structures. 

When and Who Needs the MRI Orbits without Contrast Scan? 

Indications for MRI Orbits Without Contrast 

• Changes to vision when looking toward near or further objects 
• Loss or blurriness of vision  
• Eye inflammation and demyelinating diseases (e.g., MS) 
• Swelling of the eye and its surrounding tissues 
• Trauma to soft or bony components of the eye socket 
• Evaluation of masses or lesions in the eye socket (orbits) 
• Proptosis associated with thyroid diseases 

Patient Demographics: 

• Patients with vision works-up requiring interdisciplinary care between neurology and ophthalmology  
• Americans with autoimmune or demyelinating diseases  
• Patients with trauma in orbit or orbital tumours or masses 

Benefits of the MRI Orbits Without Contrast Test

• High diagnostic accuracy without any invasive procedure involved.  
• Soft tissue radiation is not utilized.  
• Exceptional visualization of soft tissue detail.  
• Examination of neurological disease and orbital pathology is possible.  
• Most patients inclusive of children and pregnant women with precautions can be scanned (rare cases). 

Conditions Diagnosed Using MRI Orbits Without Contrast Test

• Optic neuritis  
• Orbital Cellulitis or Pseudotumor.  
• Thyroid Eye disease  
• Congenital anomalies  
• Orbital masses Meningiomas and gliomas.  
• Demyelinating diseases involving the optic pathways. 

• No intake of food or fluids is required.  
• Contact lenses, eye makeup of any sort, metal accessories and glasses must all removed.  
• Put on comfortable clothing or a hospital gown.  
• Notify the radiologist about any weapons grade implants or metallic pieces. 

Pre-requisites for MRI Orbits without Contrast Test 

• Recommended by another healthcare professional.  
• Documented clinical history or symptoms suggesting orbital pathology.  
• Filled out the MRI safety screening form.  
• Not required: Contrast agent. 

Best Time Schedule an MRI Orbits Without Contrast 

• Following the recommendation of the physician.  
• Usually advised first goes the initial visual symptoms.  
• Optimal just prior to commencing corticosteroids or alternate therapies. 
• Most individuals are eligible. 
• Patients with non-MRI-compatible implants are unsuitable.  
• Patients with claustrophobia may need to be mildly sedated. 

Procedure – How MRI Orbits Scan without Contrast is Done 

• Patient is positioned face up on the MRI scheduler table with their head placed into a specific head coil.  
• Appropriate earplugs/headphones to block noise are given. 
• Scanning takes approximately 20–30 minutes.  
• Intravenous lines and contrast injections are not necessary.  
• Active stillness is required for images to be captured.  
• Technologist supervision is continuous throughout the procedure. 

Caution 

• Limit head motion as much as possible- minimizing motion greatly improves image quality.  
• Notify the technician immediately if discomfort or anxiety symptoms begin.  
• Ensure areas surrounding the eyes are free of metals, such as eyeliners and false lashes with metal components.