| |
The purpose of this study is to show sites of infection or inflammation in the body. This will enable your doctor to make a diagnosis and so give appropriate treatment as necessary.
On arrival, we will place a cannula (small needle) into a vein in your arm or hand, and then take a blood sample. Using this sample, we will label your white blood cells with a small amount of radioactivity. The labelling procedure can take 2 hours, after which time we will inject your labelled white cells back into your vein through the cannula. A scan will then be carried out 1 hour later, and again 3-4 hours after injection of the labelled cells. You will have to lie down on a couch, and a gamma camera will take pictures of your body. On occasions, the pictures may be taken with you sitting or standing. You do not normally need to take off clothing. Only removal of jewellery or metal objects is required. In order to obtain good pictures the camera will be close and you will have to keep still. Each imaging session will take 30-45 minutes. You may have to return to the department the next day for another scan which will take approximately 1 hour.
If you are pregnant, or you think you might be pregnant, you need to inform your doctor or the Nuclear Medicine staff before attending your appointment. In general, exposure to radiation during pregnancy should be kept to a minimum and it may be necessary to postpone your scan. The present guidelines recommend that breast-feeding need not be interrupted if the mother is undergoing this test; however, it is advisable to feed the baby before the injection and to express and discard any milk secreted over the first 3 hours following the injection.
We would prefer that you do not bring more than one person with you. It is advisable not to have a pregnant woman or a small child with you. This is to avoid exposing them to unnecessary radiation. It is also preferable to avoid prolonged close contact (hugging a child / sitting a child on your knee for more than half an hour) for the rest of the day.
You may eat, drink, and take your medication as normal.
You may feel a slight pinprick from the injection needle. Our doctors will be available during your stay in the department to answer any queries and to provide medical cover in case of any side effect from the injection we give you (please note that side effects are extremely rare).
The amount of radioactivity you receive in this study is strictly within the recommended national level. At this level, the benefit to you from a diagnosis of your condition outweighs the risk (negligible) of any harm associated with the radiation you will receive.
You may eat as normal. The more fluid you drink the better, as the radioactivity is passed out in the urine. No extra precautions need to be taken when passing urine.
The Nuclear Medicine doctor will report on the study and the result will be sent to the doctor who requested the study. He/she will be able to discuss the results with you in relation to other tests you may have had.