CT Scan Brain & Orbits

A CT (Computed Tomography) scan of the brain and orbits is a type of imaging test that captures the head and eye sockets (orbits) using X-rays and a computer. This test is widely done to help identify and manage problems such the headaches, dizziness, seizures, or eye trauma.

What is a CT Scan of Brain and Orbits?

CT scan of the brain and orbits consists of an automatic X-ray machine that rotates around the patient capturing the brain and orbits. The X-ray machine has a computer that turns the captures into a detailed 3D image of the inner parts of the brain and orbits. This technology allows a doctor to view the orbits and the brain structures in finer details which helps in the diagnosis and management of many conditions.

Types of CT Scan of Brain & Orbits

A CT scan of the brain and orbits may be classified into different types, such as:

• Non-contrast CT scan: This is the standard form of CT scan, which employs X-rays to image the brain and orbits.
• Contrast CT scan: This type of scan uses a contrast agent to enhance specific areas of the brain and orbits.
• Spiral CT scan: This type of scan captures the brain and orbits in a spiral motion.

During the procedure, the following parameters are taken into consideration:

• The density associated with the brain tissue
• Tumorous and cystic growths
• The brain structure’s morphology and dimensions
• Inflammatory and bleeding changes
• Sinuses and orbital condition

Usually, the following conditions warrant a CT scan of the brain and orbits:

• Chronic headaches or migraine
• Dizziness and balance disturbances
• Convulsions and seizures
• Ocular trauma and other sight-related issues
• Suspected stroke or neoplasm of the brain
• Inflammatory sinus disease
• Trauma and concussion

When and Who Needs to Take a CT scan of Brain & Orbits?

A CT scan of the orbits and brain may be recommended for patients who present with:

• Eye trauma or any vision-related issues
• Intense headaches and migraines
• Dizziness, loss of coordination and balance
• Seizures and other convulsive activities
• Diagnosis of sinus infections and inflammation
• Suspected stroke or brain tumours
• Trauma to the head such as concussions

This type of examination is frequently required by every patient irrespective of age, from toddlers to adults.

A CT scan of the brain and orbits has a few advantages such as:

• Precise identification of pathological conditions concerning the brain and orbits
• Early detection of lesions such as tumours or cysts
• Evaluation of the efficacy of treatment performed
• Diagnosis of cerebrums and bleeding in the brain

These are the conditions that can be found using a CT scan of the brain and orbits:

• Tumours of the brain
• Stroke and cerebral vasculature
• Inflammatory diseases of the sinuses
• Ocular trauma or visual difficulties.
• Traumatic head injury or concussion.
• Epileptic manifestations.
• Tension-type headaches or migraines.

The patients need to:

• Take off any metal or jewellery they’re wearing.
• Be in loose, comfortable attire.
• Refrain from food and drinks for 4-6 hours prior to the examination.
• Do not take medication which may alter the results of the examination.

Pre-requisites

No specific requirement must be fulfilled prior to performing a CT scan of a patient’s brain and orbit, but it is recommended for patients to inform their physician or radiology technician when:

• They are currently breastfeeding or pregnant.
• Have any medical implants or devices.
• Suffers from any form of allergy or hypersensitivity.

Best Time to Take the CT Scan of Brain & Orbits

This examination can be performed at any given time, though most often it is done around noon.

Eligibility

This exam is open for all ages, starting from infants up to the elderly; however, acceptability may be limited due to certain medical conditions or implants.

Procedure for Taking a CT scan of the Brain and Orbits

The exam will normally last for 15-30 minutes. It consists of the following steps:

1. Preparation: The patient is placed on a table that is moved into the CT scanner.
2. Scanning: The CT scanner moves around the patient capturing several images of the brain and orbits of the head.
3. Contrast injection: If contrast dye is to be used, it will be injected into the patient’s arm.
4. Image reconstruction: A computer puts together the images into detailed cross-sectional views of the brain and orbits.

Caution Before Taking the Test

Patients should notify their physician or technician if they:

• Are currently pregnant or breast feeding
• Have any medical implants or devices
• Have any allergies or sensitivities
• Suffer from kidney disease or total kidney failure

Every medical test has its risks and limitations. In the case of CT scan of the brain and orbits, they entail:

• A hazard in the form of radiation: As is the case with every medical exam, there is an inherent risk in the use of X-rays in CT scans. Living tissues can be damaged as a result. Thankfully, these scans involve minimal radiation and the benefits of conducting them outweighs the negatives.
• Allergies: The use of contrast dyes may provoke allergic reactions in some patients. These reactions may present themselves in the form of hives, severe itching, and trouble with breathing.
• Claustrophobia: The design of a CT scanner involves an enclosed space that tends to make some patients anxious and uncomfortable.
• Diagnostic accuracy: Similar to other medical imaging techniques, a CT scan might miss some conditions or abnormalities, even though it is usually very precise.