Parathyroid Scan 

Department of Nuclear Medicine 

What is this information about?

This information is about your parathyroid scan. 

Why have I been given this information?

You have been given this information because your doctor has referred (sent) your parathyroid scan.

Reading this information can help you to know what to expect from your scan. Following the advice will help to make sure that the scan goes as well as it can.   

What is Nuclear Medicine?

Nuclear medicine:  

• is a safe and painless technique which provides medical images of the body.  
• uses small amounts of radioactive materials as tracers to diagnose or treat disease. In diagnosing a condition, the radiation is detected by a special type of camera called a “Gamma camera”.  

What is a parathyroid scan?

Parathyroid glands are part of the body’s endocrine system. The endocrine system is a network of glands that produce and release hormones.  

Parathyroid glands make a hormone that balances bone and blood calcium levels. Hormones are chemical messengers that control how cells and organs do their work. 

Overactive parathyroid glands can lead to an imbalance called primary hyperparathyroidism.  A parathyroid scan helps to identify which gland or glands are not working as they should.  

What can I expect during my appointment?

• We will give you an injection of a radioactive substance (‘radiotracer’) into a vein in your arm. The radioactivity does not last for long in your body.    
• 15 minutes after your injection we will ask you lie down on a table while a camera is positioned over your head and neck. This is part one of the scan. 
• You can then leave the department if you wish. You must return for the second part of your scan appointment around 2 hours later.  
• After your injection we will ask you to increase your fluids and to empty your bladder as often as you can. This reduces the radioactive dose to your bladder.  
• While you are having the scan you must lie as still as you can on a ‘table’ while a camera moves over your body. The camera will not touch you and you will not be in a ‘tunnel’. 

Where should I go for my scan?

You will have your scan in the Nuclear Medicine Department, St Richard’s Hospital.    

Use the main entrance to the Outpatients Department. This is in the South Wing of the hospital.   

Once you are inside the Outpatients Department, turn right and take the stairs or lift to the Department of Nuclear Medicine on the first floor.  

Wheelchairs are available just inside the entrance on the ground floor.  

If you are arriving by car, please use hospital entrance number 2.    

If you need to park, use the ‘pay on foot’ car park close to the entrance to the Outpatients department (South car park). Pay at the end of your parking session using the machines in the Outpatients department entrance. Disabled parking bays are available for the registered disabled near the main Outpatients’ entrance.    

How can I prepare for a renal scan?

• Eating and drinking. You can eat and drink as usual before the scan appointment.   
• Medications.  You do not need to stop any medication for a Parathyroid scan.  

Might I have an allergic reaction to the radioactive injection?

Allergic reactions to the radiotracer are very rare but can happen.  

Can I have a bone scan if I am pregnant or breastfeeding?

We will check your pregnancy status with you before the scan. If you are, or think you may be, pregnant you must tell us as soon as possible. Breastfeeding patients should prepare to express and discard milk following the radiotracer injection.  

Will I need to undress for my scan?

We recommend that you wear comfortable, loose clothing. Usually, you do not need to undress for your scan. You may need to remove items around the head and neck such as jewellery and other items of clothing with metal in them.  

What should I do if I cannot come to my appointment?

You must let us know as soon as possible if you are unable to attend. This is so that we can offer the appointment to someone else. 

How long will the scan take?

Parathyroid scans are in two parts.  

The first scan will take about 10 minutes.  

The second scan will take about 45 mins.     

Who will be at my scan?

A radiographer or an assistant practitioner will be with you in the room during both scans.  

There are students training in the scanning department. A qualified radiographer will supervise them if they do your scan. Please tell us if you would prefer not to have a trainee at your scan.   

Are there any risks?

We are all exposed to natural background radiation every day. This comes from the ground, building materials around us, the food we eat and from the sun.   

This scan will give you a small extra radiation dose on top of this. The amount depends on the type of scan you are having. It ranges from a few days’ natural background radiation to a few years.  

After weighing up the risks and benefits your doctor has decided that having the scan is right for you. They believe that the potential benefits outweigh the risk.   

The radiation dose for the scan is listed in the table below, along with a comparison of radiation doses from other sources of radiation.   

The only effect known at these low doses is a very small increase in the chance that you might get cancer many years or even decades after the exposure.   

The additional cancer risks from these different sources of radiation are shown in the table below.   

These risk levels are a very small addition to the 1 in 2 chance we all have of getting cancer at some point during our lifetime. 

After your appointment?

For some patients your doctor may arrange an additional ultrasound of your parathyroid glands after the nuclear medicine scan. If this is the case, the Ultrasound team will contact you to arrange an appointment. 

Can I drive home after my scan?

Yes.

When will I get my scan results?

The results will be sent to the doctor who asked for the examination and will usually be with them within 2 weeks. If you have an appointment sooner than this then please let us know so we can make sure the results are provided in time. 

Can I bring someone else with me to my appointment?

Yes. You can bring someone, such as a friend, relative or carer with you. They must be over the age of 16 .

How is my medical data protected?

Everyone working within the NHS has a legal duty to keep patient information about you confidential & secure. If you have any concerns around the use of your medical and diagnostic imaging information, copies of the “Care Record Guarantee” and “Your Medical Data” leaflets can be downloaded from:

You can get a printed copy of these leaflets from the PALS (Patient Advice and Liaison) office at Worthing or St Richard’s, Chichester, Hospitals.  

Who can I contact if I need further information or support after I have read this information?

I need help with transport to my appointment for medical or financial reasons. What help is available?