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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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Monkeypox Virus Symptoms: Early Signs, Disease Progression, and When to Seek Care

Monkeypox, now commonly referred to as mpox, is a viral infection that has gained global attention due to outbreaks beyond traditionally affected regions. Understanding monkeypox virus symptoms is essential for early detection, timely isolation and prevention of further spread.

According to the World Health Organization and Indian public health authorities, awareness of symptom patterns plays a critical role in controlling outbreaks and protecting vulnerable populations.

What Is the Monkeypox Virus?

Monkeypox is caused by the monkeypox virus, a member of the Orthopoxvirus family, which also includes smallpox. While generally less severe than smallpox, monkeypox can still cause significant illness and discomfort.

The virus spreads primarily through close physical contact.

Incubation Period of Monkeypox

After exposure, symptoms typically appear within:

5 to 21 days
most commonly 6 to 13 days

Individuals may feel well during this period but can become infectious once symptoms begin.

Early Monkeypox Virus Symptoms

Fever

Fever is usually the first symptom and may be:

sudden in onset
moderate to high grade
accompanied by chills

Fever signals the start of systemic infection.

Headache and Body Aches

Patients often experience:

severe headache
muscle aches
back pain

These symptoms resemble many viral illnesses.

Fatigue and Weakness

Marked tiredness and low energy levels are common and may limit daily activities.

Swollen Lymph Nodes

Swollen lymph nodes are a distinguishing feature of monkeypox.

Common sites include:

neck
armpits
groin

This helps differentiate monkeypox from chickenpox or smallpox.

Development of Monkeypox Rash

The skin rash usually appears:

1 to 3 days after fever onset

It may begin on the face or genital area and spread to other parts of the body.

Stages of Monkeypox Rash

The rash progresses through well-defined stages:

Macules

Flat red spots on the skin.

Papules

Raised, firm bumps.

Vesicles

Fluid-filled blisters.

Pustules

Pus-filled lesions that are painful.

Scabs

Lesions crust over and eventually fall off.

Complete healing occurs once scabs detach.

Distribution of Rash

Rash commonly affects:

face
hands and feet
mouth
genital and anal areas

The number of lesions can vary widely.

Pain and Discomfort

Rash lesions may be:

painful
itchy during healing

Pain severity differs between individuals.

Other Possible Symptoms

Additional symptoms may include:

sore throat
cough
nasal congestion

These reflect upper respiratory involvement.

Duration of Illness

Monkeypox symptoms typically last:

2 to 4 weeks

Recovery occurs gradually as lesions heal.

Who Is at Higher Risk of Severe Illness?

Higher risk groups include:

children
pregnant women
individuals with weakened immunity
people with chronic illness

Early care is crucial in these groups.

Complications of Monkeypox

Though uncommon, complications may include:

secondary bacterial skin infections
dehydration
pneumonia
eye involvement

Prompt medical guidance reduces risk.

How Monkeypox Is Transmitted

Transmission occurs through:

direct skin-to-skin contact
contact with lesions or bodily fluids
respiratory droplets during close contact
contaminated clothing or bedding

Understanding transmission helps prevent spread.

When to Seek Medical Care

Seek medical evaluation if:

fever is followed by rash
lymph nodes become swollen
rash appears in genital or facial areas

Early diagnosis supports isolation and care.

Diagnosis and Testing

Diagnosis may involve:

clinical examination
laboratory testing of lesion samples

Public health authorities guide testing protocols.

Prevention and Control Measures

Preventive steps include:

avoiding close contact with infected individuals
maintaining good hand hygiene
isolating during illness
following public health guidance

Vaccination may be recommended for high-risk groups.

Role of Public Awareness

Awareness of symptoms:

enables early detection
reduces stigma
supports timely care

WHO emphasises community education in outbreak control.

Conclusion

Monkeypox virus symptoms typically begin with fever, body aches and swollen lymph nodes, followed by a characteristic rash that progresses through defined stages. While most cases are self-limiting, early recognition, medical evaluation and isolation are essential to prevent complications and reduce transmission. Staying informed and acting promptly protects both individual and public health.

References

World Health Organization (WHO) – Mpox (Monkeypox) Clinical and Public Health Guidance
Indian Council of Medical Research (ICMR) – Emerging Viral Infections Reports
National Centre for Disease Control (NCDC), India – Monkeypox Advisories
Lancet – Clinical Features and Outcomes of Mpox
NITI Aayog – Public Health Preparedness and Infectious Disease Control

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