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PET Scan

 How Does a PET Scan Lung, Heart or on Any Other Body Part Work

Positron or PET emission tomography is a non-invasive test that creates a nuclear image of any part of the body such as the lung or heart. For this purpose, a radioactive tracer, also known as radionuclides, is injected into the blood. 

Once the follow-up mixes with the blood it is taken to the muscles and into the organ like the heart. The scan determines whether the heart is healthy or not by showing blood flow.

 For example, narrow arteries or dead cells can be diagnosed from a previous heart attack using a PET scan.

The basic steps of PET scanning:

To perform a PET CT scan, the following steps occur:

-Injected follow-up for blood circulation. It is an organic compound found in bodies labelled in a thin amount of radioactive material. Ammonia or water are generally used.

-Once inside the body the tracking produces gamma energy rays.

-The beams are collected by a detector that surrounds the body and then it is sent to a computer. The system converts the signals into clear images.

-The full picture is made by connecting pictures of thin heart slices. Each slice is photographed from different directions and angles to produce a holistic and three-dimensional image.

A doctor can determine heart function using the image. If the muscles are strong the follow-up is taken excellently. 

On the other hand, if the heart is no longer viable or has dead cells the follow-up is not taken. In PET scanning the level of absorption of the trace is perceived as different colours or degrees of brightness.

The need for a PET test:

PET scans are currently one of the most accurate procedures that can be used to detect:

-Coronary heart disease

-Low blood flow

- Wounded tissue

- Dead tissue

Depending on what the scan shows a doctor may recommend a cardiac procedure such as:

- Arterial coronary intervention (PCI)

- Aortic bypass surgery

- The surgeries will be able to restore normal blood flow to the heart.

PET scan procedure:

An MRI scan of a pet can be performed at a hospital or diagnostic laboratory. It is edited by a nuclear medicine technician and a doctor using a PET machine. First electrodes or small metal disks are placed on the arms of the patient's legs and chest. 

The electrodes are then connected to the device using wires. These are designed to monitor and record the patient's heart rate called an electrocardiogram. The ECG also indicates when the scan should be performed.

The next step is to create a base image of the organ. This is done without the addition of surveillance and takes about half an hour. 

After scanning the baseline, the material is injected through an intravenous line that has been glued to the person's arm. 

After inserting the tracer the patient lies flat on a table that slides into the scanning device with a look similar to a massive doughnut.

The scan begins when the detectors pick up the signals provided by the tracker. The data is converted to a digital image using a computer. 

One image is an accumulation of many photographs taken from all angles and slices. The whole procedure can take between an hour and three hours. 

It is essential to be completely still during the entire scanning process or that the images come out blurry.

Steps to follow after PET scan:

Because scanning is a non-invasive process the person can return to regular activity immediately after its completion. It is recommended to drink plenty of fluids the next day. 

Water makes it possible to flush out all the radioactive material, that is, the trace element from the body. Also, make an appointment with the doctor regarding the follow-up of the test results.

Risks associated with PET:

PET scanning is usually especially safe for any person. The amount of radiation to which the body is exposed is very small. Therefore the kidneys can remove it from the body for a maximum of 24 hours. The test is not recommended if the person is:


-Nursing mother

In both cases, the scan may harm the child.

The last word

Anyone who wants to know more about PET scanning before the procedure should consult a doctor. Some questions that can help clarify any doubts are:

-How is this test better than any other test?

-What are the steps to take before the scan?

- Will additional tests be needed after the scan?

-When can you expect results?

A PET scan is a painless procedure but the anxiety that accompanies any health check is always present. It is therefore necessary to perform the scan in a reputable hospital or a diagnostic laboratory.

 The technicians and other workers can make the experience even more comfortable when they are properly trained. At Anderson Diagnostics, one of the renowned scanning centres in Chennai, we take care of the best care for our patients.

We not only offer the PET devices that provide accurate imaging, but also empathy and excellent manner at the bedside. When you do a scan with us, rest assured that your health is our top priority. 

From oncology to neurology to cardiology we perform PET scans for a variety of fields. Call us or evaporate on our site to know more about the technology we use for PET scans.

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