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Published on: Apr 30, 2022
2 minute read
By: Second Medic Expert

What Is PET Scan ?

A PET scan (positron emission tomography) is a type of imaging test that uses a radioactive tracer to look for changes in the function of cells and tissues. A tracer is a substance that is introduced into the body to make it easier to see certain areas or organs. The radioactive tracer used in PET scans emits positrons, which are tiny particles that collide with electrons in the body. This creates gamma rays that can be detected by a scanner and used to create images of the inside of the body. PET scans are often used to diagnose cancer because tumor cells typically have higher levels of activity than normal cells. They can also be used to check for treatment response, measure tumor size, and identify new tumors.

PET Scan is a nuclear medicine imaging test that uses a small amount of radioactive material, called a tracer, to look for disease in the body. A PET Scan can show how well organs and tissues are working. It can help find cancer, heart problems, and other diseases. A Positron Emission Tomography (PET) scan is a medical imaging test that helps physicians diagnose and treat diseases. PET scans use a small amount of radioactive material, called a tracer, to help physicians see how organs and tissues are functioning. The radioactive tracer is injected into the patient's body and travels to the organ or tissue being studied. Physicians can then see where the tracer collects on an image of the organ or tissue.

A PET scan is helpful in diagnosing cancer, heart disease, brain disorders, and other diseases. It can also help determine how well treatment is working. PET Scan is an acronym for Positron Emission Tomography. It's a type of medical imaging that uses a small amount of radioactive material to help diagnose and treat medical conditions. A PET scanner creates 3D images of the inside of the body. PET (positron emission tomography) scans use a small amount of radioactive material called a tracer to help doctors see certain areas of the body. The tracer is injected into a vein, and images are taken as it moves through the body.

PET scans are often used to find cancer because tumors absorb more of the radioactive material than normal tissue does. PET scans can also be used to measure blood flow, check how well drugs work, and see how active the brain is. A PET scan is a type of imaging test that uses radioactive tracers to look at the function and structure of organs and tissues in your body. A small amount of radioactive material is injected into your bloodstream and then scanned by a special camera. The camera creates pictures that show where the material has collected. This can help doctors see how well an organ is working or find tumors or other problems.

PET scan is short for positron emission tomography. It's a type of medical imaging that uses a radioactive tracer to look at organ function or tissue metabolism. The tracer is a small amount of radioactive material that's injected into the patient's bloodstream. It collects in organs and tissues, and a scanner detects the radiation emitted as it decays. This information is used to create cross-sectional images of the body that show how the organs and tissues are working. PET scans are most often used to detect cancer because tumors consume more energy than normal tissue and therefore have a higher metabolic rate. But they can also be used to evaluate other problems, such as heart disease, brain function, and joint damage.

PET scanning is a type of nuclear medicine imaging. A small amount of radioactive glucose (FDG) is injected into a vein and images are taken as the glucose moves through the body. Cancer cells use more energy than normal cells and therefore absorb more of the radioactive glucose. This allows tumors to be visualized on the scan. PET stands for Positron Emission Tomography. A PET scan is a medical imaging test that uses a radioactive tracer to look at organs and tissues inside the body. The tracer is injected into a vein, and images are taken as it moves through the body.

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Liver Cirrhosis vs Fatty Liver: What’s the Difference?

Our liver plays a vital role in keeping our body healthy. It filters toxins from the blood, helps digest food, stores energy, and supports immunity. But like any organ, it can get damaged. Two common liver conditions people often confuse are fatty liver and liver cirrhosis. While both affect the liver, they are very different in terms of causes, symptoms, and outcomes.

In this blog, we’ll help you understand the key differences between liver cirrhosis and fatty liver, how they develop, their symptoms, treatments, and how to prevent them.

What Is Fatty Liver?

Fatty liver, also called hepatic steatosis, is a condition where fat builds up in the liver. It’s normal for the liver to have some fat, but if more than 5-10% of the liver's weight is fat, it's considered a fatty liver.

There are two main types:

Non-Alcoholic Fatty Liver Disease (NAFLD) – Most common, seen in people who don’t drink much alcohol.
Alcoholic Fatty Liver Disease (AFLD) – Caused by heavy alcohol use.

Fatty liver is often a silent condition. Many people don’t know they have it because it usually doesn’t cause symptoms in early stages.

Causes of Fatty Liver

Obesity
High cholesterol or triglycerides
Type 2 diabetes
High blood pressure
Rapid weight loss
Poor diet (high in sugar and fat)
Excessive alcohol intake (in AFLD)

What Is Liver Cirrhosis?

Liver cirrhosis is a late-stage liver disease where healthy liver tissue is replaced by scar tissue (fibrosis). This scarring blocks blood flow and affects the liver’s ability to work properly.

Unlike fatty liver, cirrhosis is permanent and serious. It develops slowly over years, often due to long-term liver damage from alcohol, hepatitis, or untreated fatty liver.

Causes of Liver Cirrhosis

Chronic alcohol use
Hepatitis B and C infections
Non-alcoholic steatohepatitis (NASH – advanced form of fatty liver)
Autoimmune diseases
Genetic disorders (like Wilson’s disease)
Long-term use of certain medications

Key Differences Between Fatty Liver and Cirrhosis

Aspect	Fatty Liver	Liver Cirrhosis
Nature	Fat accumulation in liver cells	Scarring and permanent damage to liver tissue
Reversibility	Reversible with lifestyle changes	Irreversible, but progression can be slowed
Symptoms	Usually no symptoms early on	Fatigue, jaundice, swelling, confusion
Causes	Obesity, diabetes, alcohol, diet	Long-term liver damage, hepatitis, alcohol
Severity	Mild to moderate	Severe and life-threatening if not managed
Treatment	Lifestyle and diet changes	Medication, regular monitoring, sometimes transplant

Symptoms to Watch Out For

Fatty Liver Symptoms (if any):

Fatigue
Mild discomfort or pain in upper right abdomen
Elevated liver enzymes in blood tests

Liver Cirrhosis Symptoms:

Yellowing of skin and eyes (jaundice)
Swelling in legs or abdomen (edema or ascites)
Easy bruising or bleeding
Confusion or memory loss (hepatic encephalopathy)
Itchy skin
Spider-like blood vessels on skin

Diagnosis: How Doctors Tell the Difference

Doctors use a combination of the following to diagnose liver issues:

Blood tests – Check liver enzymes, liver function.
Imaging (ultrasound, CT, MRI) – Shows fat or scarring in the liver.
Fibroscan or Liver Biopsy – Measures liver stiffness or checks for scarring directly.

Fatty liver shows fat deposits, while cirrhosis shows scar tissue and shrinkage of the liver.

Treatment Options

For Fatty Liver:

Weight loss – Losing 7-10% of body weight can reverse the condition.
Healthy diet – Focus on fruits, veggies, whole grains, lean protein.
Exercise – At least 30 minutes daily.
Avoid alcohol – Especially if it’s alcohol-related fatty liver.
Control diabetes/cholesterol – With diet or medication.

For Liver Cirrhosis:

Treat the underlying cause – Like hepatitis or alcohol use.
Avoid alcohol completely
Healthy diet with low salt – Prevent fluid buildup.
Medications – To manage symptoms and complications.
Regular screening – For liver cancer or internal bleeding.
Liver transplant – In advanced or end-stage cases.

Can Fatty Liver Turn into Cirrhosis?

Yes, if fatty liver is not treated, especially in non-alcoholic steatohepatitis (NASH), it can cause inflammation, fibrosis, and eventually cirrhosis over time. But the good news is – fatty liver is reversible, especially if caught early and proper steps are taken.

How to Keep Your Liver Healthy

Maintain a healthy weight
Eat a balanced diet – Avoid sugary, fried, or processed food
Exercise regularly
Avoid alcohol or drink in moderation
Don’t share needles or personal items that may carry blood
Get vaccinated for hepatitis A and B
Take medicines only as prescribed

When Should You See a Doctor?

If you feel constantly tired, have unexplained weight loss, jaundice, swelling in your abdomen or legs, or abnormal liver test results – don’t ignore it. Early diagnosis can make a big difference.

Conclusion

Fatty liver and liver cirrhosis are both serious liver conditions, but they are very different. Fatty liver is often the first stage of liver damage, and is reversible with lifestyle changes. Cirrhosis, on the other hand, is irreversible, and needs medical attention and sometimes life-long treatment.

Understanding the difference between the two helps you take better care of your liver and make informed health decisions. If you or someone you know is at risk, it’s never too early to make a change.

Want to know more about how to keep your liver healthy? Talk to your doctor today and understand the risks. Liver cirrhosis vs fatty liver: What’s the difference? Find out now and protect your health before it’s too late.

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