PET stands for Positron emission topography. Here small chunks of radioactive substances are brought into picture, where the help of a computer and a camera the tissue along with organ functions are evaluated. Any changes of the body that is being identified at a cellular level would go on to detect the onset of the disorder before you make it evident on the other type of imaging tests. Before you visit a PET CT scan centre in Hyderabad, discuss with your doctor if a possibility of pregnancy exists or if you are into breastfeeding. The doctor is going to guide you about the type of exam that is subject to being performed. Do discuss any recent disorders or medications as well as allergies that you are subject to. This would be in particular reference to the contrast material. Before several hours of the scan you should not eat or drink anything. All the jewels have to be left at home and you should wear loose clothes. It is suggested that you make a switch over to a hospital gown.
Normally this procedure is undertaken on an outpatient basis, but hospitalized patients too are part of this procedure. On an examination table you will be positioned. If the need arises a nurse will insert a catheter on to your arm or the vein. It all depends upon the type of nuclear medicine you are undergoing and then the radiotracer is injected in an intravenous manner.
Normally it would take an hour for the radiotracer to travel across your body and it is absorbed by the tissue or the organ under study. It is suggested that you might be asked to rest quietly restricting any major movement or talking. At the same time you might be asked to drink some contrast material which will be localizing at your intestines and would provide guidance on the radiologist to interpret things in a better way.
You are going to be moved over to the PET scan and then the images will be taken. During imaging you might have to remain still. First the CET scan is going to be undertaken followed by the PET scan. If you analyse in depth the exact duration of a CT scan is going to take less than a couple of minutes. On the other side of the coin the PET scan takes around 30 minutes at the most.
Once the examination is over the technologist might ask you to wait to check out the images as sometimes you might need some additional images. If the need for additional images appears it does not mean that there is any problem with the examination procedure.
What is the experience going to be before and after the procedure?
Till the point of time where some intravenous injections are given, most medical procedures work out to be a painless affair and you are likely to come across minimum side effects or for the matter any discomfort.
The moment a radiotracer is provided you will feel a slight pin prick and this is when the needle is being inserted on to the vein. There is a possibility that a cold sensation could also be felt on the arm but in most of the cases it is devoid of any major side effects.
If you swallow it the radiotracer has no taste. The same policy applies in case if you inhale it or if you are planning to hold the breath. During the course of some procedures a catheter could be placed in the bladder that could lead to some immediate discomfort.
When the images are recorded it is really important that you become still. With nuclear imaging it does not lead to any pain, there is going to be a degree of discomfort when you need to sit still in a room for a long term when imaging is undertaken. Though there is a feeling that you could be a bit anxious during the course of scanning.
Most of the top doctors in the PET scan centres in Hyderabad, may ask you to return back to normal activities once the process of scanning is done. If any special instructions are to be provided then the technologist would explain it to you.
In due course of time the radiotracer substance in your body is going to lose power. In the first few hours after the test it may flow out through the urine or stool. It is suggested that you should drink plenty of water so as to flush out the toxin from the body which is instructed by the medical personnel.
The limitations associated with a PET scan
If any medical nuclear procedure is undertaken it could work out to be a time consuming process. It does take a considerable amount of time for the radiotracer to assemble at the point of interest and to perform you may have to spend several hours. In certain cases with the emergence of new equipment the turnaround time is reduced to a considerable extent.
Any resolution that you come across in the structure of the body will not be high when you compare it to the other imaging methods. This would be a MRI or CT scan to name a few. This form of nuclear medicine scan works out to be more sensitive with the functional output aligns with the other imaging techniques. If you are a diabetic the test results can be adversely affected due to the fluctuating levels of sugar.
As the radioactive substance is known to decay in a quick manner for a short period of time it would seem to be affective. Therefore it is really important for the patient to be on time for the procedure and at the scheduled time receive the radioactive material. If you arrive late it means that the process has to put off for the next day. If the person happens to be obese then they might not fit in to the CET or PET unit.