Thyroid

Thyroid Scan

What is a thyroid scan?

A thyroid scan can check the function of the thyroid and also the possible existence of thyroid abnormalities.

Are there any special preparations for the scan?

If you are taking carbimazole or Propylthiouracil (PTU), you must stop for 3 days prior to the scan appointment. You can resume taking them once the scan is completed.

Please phone the department (01483 406701) if you are on Thyroxine or if you have had an X-ray examination involving contrast material within the last 4 months

What happens when I arrive in Nucelar Medicine?

Upon arrival in the Department you will be given a small injection of a slightly radioactive substance into a vein in your arm.

How long between the injection and the scan?

There is a delay of around 20 minutes between the injection and the scan. This is to allow time for the radioactive material to enter your thyroid.

How are the images acquired?

You will be asked to lie on the imaging couch. The camera will be positioned above and close to your face. The images take around 30 minutes to acquire.

Parathyroid Scan

What is a parathyroid scan?

Parathyroid scanning can help to determine if any of the parathyroid glands are overactive. This overactivity can be one of the causes of raised calcuim levels in the blood. There are usually 4 parathyroid glands in the neck.

Is there any special preparations for the scan?

There are no special preparations for the scan You can eat and drink as normal.

What happens when I arrive in Nucelar Medicine?

Upon arrival in the Department you will be given a small injection of a slightly radioactive substance into a vein in your arm.

How long between the injection and the scan?

There will be a delay of around 15 minutes between the injection and the first set of images. It will also be necessary to take a second set of images at 90 minutes after your injection and in some cases we may also need to acquire images at three hours after injection. Your will be free to leave the department between the image acquisitions.

How are the images acquired?

You will be asked to lie on the imaging couch. It will be essential that you lie very still so that we can acquire a good set of images. The camera will be positioned above and close to your face. This imaging takes about 5 minutes. At 90 minutes, it will be necessary to repeat the image and then take a further three images (about 5 minutes each) with the camera at different angles. Should the 3 hour acquisition be necessary, the four images will be repeated.

l123 Whole Body Scan

What is an I123 whole body scan?

An I 123 whole body scan helps detect and follow up tumour distribution from thyroid cancer.

Are there special preparations for the scan?

If you are taking thyroxine (T4) please stop for 4 weeks prior to the appointment.

If you are taking leiothyronine (T3), please stop for 2 weeks prior to the appointment.

You may restart these medications after you have attended for the scan

What happens when I arrive in the department?

When you first arrive in the department a small injection of radioactivity will be given in your arm.

How long between the injection and the scan?

There is usually a four hour wait between the injection and the first set of images. You are free to leave the department and hospital between the injection and the taking of the 1st set of images. A second set of images will need to be acquired at 24 hours.

How are the images acquired?

You will be asked to lie on the imaging couch. Cameras will be placed above and below your head. They will be close to your body but will not touch it. The cameras then will move towards your feet. Finally a SPECT image may be acquired. This will be repeated at the 24 hours too

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