Method Of Diagnosis: Positive Emission Tomography
PET or positive emission tomography is one of the newest diagnostic methods which is based on the use of radiopharmaceuticals. These drugs help to construct a three-dimensional image of functional processes that occur inside the body.
Unlike traditional diagnostic methods, such as MRI or CT, positive emission tomography is used to study the functional characteristics of organs and systems, rather than research their anatomical features.
Where PET is used?
Most often, a positive emission tomography is used in the diagnosis of cancer . Through this method can detect malignancies that are larger than one centimeter in the body. With the help of this method there can be detected benign tumors, heart disease, vascular disease and brain malfunctions.
The mechanism of PET action
The main component of PET are radiofarmmeans that can determine most cancer tumors. Specially marked particles glucose are used for this purpose. PET's mechanism of action implies that the malignancy cell accumulates glucose much more actively than normal tissue does, and it helps to determine the localization of cancerous tumors.
Determination of the location of a tumor is performed by means of computer tomography. It shows a detailed anatomical picture of investigated area.
For Whoom PET Is Prohibited
The main contraindication to PET is pregnancy and lactation. In addition, it is undesirable to apply the method of positive emission tomography to patients that are in serious conditions, because this method requires patient's immobility to be preserved for a long time.
How to prepare for PET
- It is recommended not to eat for three hours before the test.
- Before the procedure you should inform your doctor about chronic diseases, especially if you have diabetes.
- Inform your doctor about medicine taken before the procedure or used regularly.
- Immediately prior to the diagnosis, the patient has a special substance injected into a vein, then he pr she must be in a state of rest from half an hour to an hour, until the solution is distributed throughout the body. At this time, it is necessary to maintain complete peace of mind, not to speak or move, as the solution can get stored in the muscles, making it difficult to diagnose.
- PET procedure lasts for about 40 minutes, during which the sensors are moved along the body to determine areas where the solution is stored.
- After the procedure it is recommended to drink plenty of fluids, so that the solution quickly comes out of the body.
- Processing of diagnostic results lasts from a few hours to two or three days.