pneumonia CT scan preparation

Overview

Pneumonia is an infection in your lungs that makes the air sacs fill with fluid or pus. It can cause cough, fever, and trouble breathing. A CT scan is a special X-ray that gives a detailed picture of your lungs, and it can help your doctor see if you have pneumonia and how bad it is.

Yes, pneumonia is common worldwide. Millions of people get it each year, especially during cold and flu season.

Anyone can get pneumonia, but it is more common in young children, older adults (over 65), people with weak immune systems, and those with chronic health conditions like asthma, diabetes, or heart disease.

Symptoms

Common symptoms

• Cough that may bring up green, yellow, or bloody mucus
• Fever, sweating, and chills
• Shortness of breath or fast breathing
• Chest pain that gets worse when you cough or breathe deeply
• Tiredness and low energy

Symptoms in children

• Fast or noisy breathing
• Fussiness or irritability
• Poor feeding or not wanting to eat
• Cough and fever

Symptoms in older adults

• Confusion or change in mental awareness
• Low body temperature (instead of high fever)
• Weakness and dizziness
• Loss of appetite

Causes

Main causes

• Bacteria, most often Streptococcus pneumoniae (pneumococcus)
• Viruses, including influenza (flu), RSV, and the virus that causes COVID-19
• Fungi, especially in people with weakened immune systems

Risk factors

• Being under age 5 or over age 65
• Having a chronic illness like asthma, COPD, diabetes, or heart disease
• Smoking or heavy alcohol use
• Having a weak immune system from conditions like HIV or cancer treatment
• Recent surgery or being in the hospital

When to see a doctor

See a doctor urgently if:

• If you have trouble breathing, chest pain, or cough up blood, call 911 (or your local emergency number) right away.
• If you have a high fever that doesn’t come down, or you feel very confused or drowsy, seek care immediately.

Book a routine appointment if:

• If you have a cough that lasts more than a week, with fever or mucus that is green, yellow, or bloody.
• If you have a condition that puts you at higher risk (like asthma or diabetes) and you think you may have pneumonia.

Diagnosis

Your doctor will ask about your symptoms, listen to your lungs with a stethoscope, and may order a chest X-ray or CT scan. The CT scan gives a more detailed picture than an X-ray.

Tests that may be done

• Chest X-ray
• CT scan (computed tomography) of the chest
• Blood tests to check for infection
• Sputum (mucus) test to find the cause

What to expect at your appointment

For a CT scan of the chest, you will lie on a table that slides into a large, donut-shaped machine. The scan is painless and takes about 5 to 10 minutes. You may be asked to hold your breath for a few seconds while the pictures are taken. Usually, no special preparation is needed—you can eat, drink, and take your medicines as usual. But tell your doctor if you are pregnant or have had an allergic reaction to contrast dye (a special liquid that helps show details). If contrast is used, you may feel a warm sensation or a metal taste in your mouth; this is normal and goes away quickly.

Treatment

Treatment for pneumonia depends on whether it is caused by bacteria, viruses, or fungi. Most people get better with rest, fluids, and medicine. Your doctor will choose the best treatment for you.

Self-care at home

• Get plenty of rest and sleep
• Drink lots of fluids like water, herbal tea, or clear soup
• Use a humidifier or take warm baths to loosen phlegm
• Avoid smoking and being around smoke

Medical treatments

If your pneumonia is caused by bacteria, your doctor may prescribe an antibiotic to fight the infection. If it is viral, antibiotics won’t help, but you may get antiviral medicines or care to manage symptoms. For fungal pneumonia, antifungal medications are used. Your doctor will tell you the exact medicine and how to take it. Always finish the full course, even if you start to feel better.

When is surgery considered?

Surgery is rarely needed for pneumonia. In some cases, if fluid around the lung (empyema) does not drain on its own, a doctor may need to put in a small tube to drain it. This is not common.

Living with this condition

During recovery from pneumonia, take it easy. You may feel tired for several weeks. Slowly increase your activity as you feel better. Drink plenty of fluids and eat small, nutritious meals.

Lifestyle tips

• Get a flu shot every year and ask your doctor about the pneumonia vaccine
• Wash your hands often to avoid infections
• If you smoke, ask your doctor for help quitting

Diet and exercise

Eat foods that are easy to swallow and nutritious, like soups, smoothies, and soft vegetables. When you have more energy, gentle walks can help you regain strength. Do not rush back to intense exercise until your doctor says it is safe.

Mental health and emotional wellbeing

Being ill with pneumonia can make you feel worried or down. It’s normal to feel frustrated while you recover. Talk to your doctor or a trusted friend about how you feel. If you have thoughts of harming yourself, please call a crisis support line right away.

Prevention

Many cases of pneumonia can be prevented with vaccines, good hygiene, and a healthy lifestyle. Not smoking and avoiding secondhand smoke also lower your risk.

Vaccines

Vaccines are available for some types of pneumonia. Ask your doctor if you should get the pneumococcal vaccine (which protects against bacterial pneumonia) and the annual flu shot. There are also vaccines for COVID-19 and whooping cough, which can help prevent pneumonia.

Screening programmes

There is no routine screening test for pneumonia. If you have risk factors, your doctor may recommend a yearly check-up and discuss prevention.

Complications

If left untreated

• The infection can spread to your bloodstream (sepsis), which is life-threatening
• Fluid can build up around your lungs (pleural effusion), making it harder to breathe
• Abscesses (pus pockets) may form in your lungs

Long-term outlook

Most people recover from pneumonia with proper care. The outlook is very good for healthy individuals. Even if you need a CT scan to check your lungs, it can help your doctor make sure you get the right treatment. With rest and the right medicines, most people feel better in a few days to a few weeks.

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