CT TEMPORAL BONE

CT Temporal Bone scan is a type of specialized radiology test that evaluates the sides of the skull and structures within the temporal bone. It captures specific slices (cross-sectional images) of the temporal bone and its internal structures, which aid in the evaluation and management of any pathology associated with this region. 

What is CT Temporal Bone? 

CT or Computed Tomography (CT) scan is a radiology test that utilizes X-ray images taken from different angles around the body, often referred to as a cross-section, and employs complex algorithms to develop the scanned region into a three-dimensional image. The CT Temporal Bone scan is a more specific procedure targeting the temporal bone; it does perform elaborate X-ray processes and algorithms specific to high-quality image formation.  

It contains important structures like the middle and inner ear, the temporomandibular joint (TMJ), and numerous associated blood vessels and nerves. This scan provides physicians with an expanded view of these structures, which is very helpful in understanding complex diagnostic and therapeutic challenges related to this region. 

Types of CT Temporal Bone 

The two primary subtypes of CT scans of the temporal bone are:  

• High resolution CT (HRCT) – captures the image of the bony details of the temporal bone.  
• Contrast-enhanced CT – utilizes a contrast medium to depict the soft parts and vessels in the temporal bone. 

List of Parameters Considered During the CT Temporal Bone

Doctors consider the following parameters during the scan: 

• Bony Structures: Check the functional status of the temporal bone, its internal structures and the surrounding bony complex. 
• Soft Tissue Structures: Check the middle ear and the inner ear, temporomandibular region, and adjacent soft tissues. 
• Blood Vessels and Nerves: Examine the vessels and nerves located within the region of the temporal bone. 

Reasons for Taking a CT Temporal Bone

This test is done for purposes like: 

• Ear or Hearing Problems 
• Tumours or Cyst Evaluation 
• Head or Ear Injury Evaluation 
• Monitoring Congenital Disorders 
• Planning Surgical Procedures 

When and Who Needs to Take a CT Temporal Bone?  

A healthcare professional may suggest getting a CT scan of the temporal bone in the following circumstances:  

• Hearing difficulties or tinnitus (ringing in the ear)  
• Earaches or ear infections  
• Problems with balance or vertigo  
• Weakness or paralysis of the face  
• Head or ear trauma  
• Tumours or cysts in the temporal bone may cause concern  
• Congenital anomalies involving the ear or temporal bone 

Benefits of Taking the Test

Focus more on the treatment with less guesswork with the CT Temporal Bone scan. It helps with: 

• Conditions involving the temporal bone are diagnosed accurately 
• Internal structures are captured in detail 
• Influencing treatment offers for a broad scope of conditions 

Illnesses Diagnosed with CT Temporal Bone

These are some of the more common conditions that can be found with CT Temporal Bone diagnostics: 

• Might show abnormalities like Otitis media (middle ear infection) 
• Bone growth in the middle ear known as Otosclerosis 
• Abnormal skin growth in the middle ear called Cholesteatoma 
• Disorder affecting balance or hearing called Meniere's disease 
• Skeletal development known as Acoustic neuroma 

Preparing for CT Temporal Bone

Patients need to: 

• Remove any metal objects like jewellery or glasses 
• Get into a hospital gown 
• Abstain from eating or drinking hours prior to the test, in case a contrast agent will be used (If Contrast Agent is Used) 

Pre-requisites 

• Prepare any allergies or health issues you have with the doctor 
• Take out any hearing aids or dental work 

Best Time to Take the CT Temporal Bone 

Although there is no preferred time, the CT Temporal Bone can be carried out whenever. However, it is commonly done considering the seriousness of the symptoms. 

Eligibility 

All patients of any age are eligible for the CT Temporal Bone scan. However, individuals who are pregnant or nursing should notify their physician prior to the examination.   

Procedure for Taking a CT Temporal Bone 

1. The patient is positioned on a couch which moves into the CT machine. 
2. The technologist rotates the patient's head into the proper position for imaging the temporal bone. 
3. The X-ray tube in the CT scanner obtains the X-ray images of the temporal bone. 
4. The procedure usually lasts between 10 and 30 minutes. 

Caution Before Taking the Test 

Inform your doctor if:  

• You are pregnant or nursing 
• You have any medical allergies or conditions 
• You have any metallic fragments within your body such as; A pacemaker, or an artificial joint.