Temporal Bone CT

Temporal Bone CT is a non contrast study of the bony structures which are on the side of the head which protects the inner ear.  It can also look at the tissue surrounding the area and inner ear structure.
Your may have referred you for this scan for the following reasons:

• Trauma, 
• Hearing loss,
• Cholesteatoma,
• Pre-operative assessment,
• Otosclerosis,

You will need to ring the department to enquire about your individual preparation requirements for your planned examination. A CT of the temporal bones may or may not require the injection of intravenous contrast and this will depend on the reason for you having the scan.

If intravenous contrast is required for your examination then follow the instructions below:

• You may be required to fast prior to your appointment time so ensure you check with the staff when making an appointment.

• Take all medications with sips of water (unless otherwise instructed), including blood pressure medications.

• A recent blood test will need to be completed to assess the function of your kidneys prior to your appointment. If your blood test was taken outside the hospital then you will need to obtain a copy of the results and bring it to your examination.

It is important to inform a member of staff as soon as possible if you are pregnant BEFORE the test is performed. The examination may not be appropriate or special considerations or precautions might need to be taken. If you suspect you could be pregnant then a pregnancy test will need to be performed prior to the commencement of the examination.

For safety reasons there cannot be anyone in the room during the scanning of a CT and relatives must wait outside. A staff member will be behind the glass window a short distance away watching the patient at all times during the scan should there be any concerns.

There will paperwork such as a questionnaire and consent form which you will be required to fill in upon arrival to the department. Children under the age of 16 will require consent from a guardian.

You'll need to remove any clothes, jewellery or other objects that may interfere with the procedure such as earrings, nose rings, hair clips. You will also need to remove any dentures and eye glasses before the examination.

If you require an interpreter, please inform the booking clerk at the time of booking.

If you require intravenous contrast then a cannula (needle) will need to be inserted in your arm by the nurses upon arrival. The contrast will highlight the blood vessels allowing us to see the blood flow.

If your examination does not require intravenous contrast then a cannula will not be inserted.

You will be asked to lie on the CT examination bed with your head positioned in a special headrest. A strap will loosely secure your head and neck straight and in position for the scan. This will help you to maintain in the correct position.

The CT examination bed will move in and out of the CT scanner multiple times as the images are acquired. Once the images are obtained then the examination is complete.

If contrast was required for your examination then the cannula will be removed from your arm prior to leaving the radiology department.

If your examination did not require the injection of contrast then you will be helped off the table and able to go home straight away.

After having an examination with intravenous contrast then it is important to help flush the contrast out of your body by drinking plenty of fluids for the rest of the day.

If you are currently taking oral hypoglycaemic such as Metformin, Diabex or Janumet for diabetes and have had the injection on contrast then it is advised to stop this medication for 48hrs after your scan. This is to prevent a build up of this medication in your body.
NOTE: this only applies if you have had an injection of contrast. If you are unsure if this applies to you then please bring a list of medications to your appointment so we can advise you.

A specialised doctor will carefully analyse your images and make a report to your referring doctor. If the referring doctor is in the hospital they will be able to access the results on the computer. If you are an out-patient then a disc of images can be made available to you within 5 working days after the CT scan.

• I need to fast for ..................... hours before my appointment (no food or drink).  You will need to confirm this requirement when you make your appointment.
  
  
• I have had a recent blood test.
  
  
• Removed all Jewellery and metal objects.
  
  

Don't forget to bring these along to your appointment

• Referral/request form from your doctor
  
  
• Medicare / Pension card
  
  
• Previous films and report
  
  
• A copy of my recent blood results (if done privately)