PET scan
Positron emission tomography (PET) scans produce detailed 3-dimensional images of the inside of the body.
The images can clearly show the part of the body being investigated, including any abnormal areas, and can highlight how well certain functions of the body are working.
PET scans are often combined with CT scans to produce even more detailed images. This is known as a PET-CT scan.
They may also occasionally be combined with an MRI scan (known as a PET-MRI scan).
Why PET scans are used
A PET scan can show how well certain parts of your body are working, rather than simply showing what they look like.
PET scans are particularly helpful for investigating confirmed cases of cancer to determine how far the cancer has spread and how well it's responding to treatment.
PET scans are sometimes used to help plan operations, such as a coronary artery bypass graft or brain surgery for epilepsy.
They can also help diagnose some conditions that affect the normal workings of the brain, such as dementia.
How PET scans work
PET scanners work by detecting the radiation given off by a substance injected into your arm called a radiotracer as it collects in different parts
Cardiac PET Scan
What Is Cardiac Rubidium PET Scan?
Cardiac PET (or cardiac positron emission tomography) is a form of 3D diagnostic imaging in which patients are evaluated using a PET scanner after intravenously injected with a radioisotope. Although several isotopes have been used for Cardiac PET imaging, the most widely employed in clinical practice is Rubidium In a Cardiac Pet scan, heart muscle that is alive is bright and heart muscle that is dead scar tissue is dark. Hence it is used to pinpoint areas of surviving heart muscle that is deprived of adequate blood flow (ischemic tissue).
What is Cardiac PET scan used for?
Cardiac Pet scan can assess both blood flow as well as metabolism accurately. In patients with blocked coronaries, Cardiac Pet scan can influence the choice between bypass surgery and angioplasty. More importantly, it can be used to predict whether depressed heart function can improve after revascularisation.
Advantages over SPECT Scan/ MIBI scan.
Due to higher resolution ,PET allows more accurate detection of myocardial ischemia than single photon emission tomography (SPECT). It can overcome artifacts that often are encountered with standard SPECT
Översikt:
En positronemissionstomografi (PET)-skanning visar hur dina vävnader och organ fungerar. Radioaktiva spårämnen som kallas radionuklider används under testet för att visa hjärtats aktiviteter. PET-skanningar är användbara för att undersöka den kemiska aktiviteten i olika delar av din kropp för att identifiera cancer, hjärtsjukdomar och hjärnsjukdomar. Eftersom PET-skanningar mäter kemisk aktivitet kan de hjälpa till att upptäcka sjukdomar innan de upptäcks av andra avbildningstester. En hjärt-PET-skanning kan visa områden med minskat blodflöde i hjärtat för att identifiera kranskärlssjukdom och ärrbildning.
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Heart PET scan
A heart positron emission tomography (PET) scan is an imaging test that uses a radioactive substance called a tracer to look for disease or poor blood flow in the heart.
Unlike magnetic resonance imaging (MRI) and computed tomography (CT), which reveal the structure of organs and blood flow to and from them, a PET scan gives more information about how organs and tissues are working.
A heart PET scan can detect whether areas of your heart muscle are receiving enough blood, if there is heart damage or scar tissue in the heart, or if there is a buildup of abnormal substances in the heart muscle.
A PET scan requires a small amount of radioactive material (tracer).
- This tracer is given through a vein (IV), most often on the inside of your elbow.
- It travels through your blood and collects in organs and tissues, including your heart.
- The tracer helps the radiologist see certain areas or diseases more clearly.
You will need to wait nearby as the tracer is absorbed by your body. This takes about 1 hour in most cases.
Then, you will lie on a narrow table, which slides into a large tunnel-shaped scanner.
- Electrodes for an electrocardiogram (ECG) will be plac
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