Last Updated on November 27, 2025 by Bilal Hasdemir

At Liv Hospital, we know that getting a PET scan can make you nervous. Many wonder if it’s okay to drive home by themselves. Usually, you can drive after a PET scan because it doesn’t make you sleepy or affect your driving.

A PET scan is a safe way to find cancer cells and check if treatments are working. The special dye used in PET scans is mostly gone from your body soon after. We make sure you’re safe and comfortable every step of the way.

Key Takeaways

• PET scans are safe and do not typically impair driving ability.
• Most patients can drive themselves home after the procedure.
• The tracer used in PET scans is mainly excreted through urine.
• Liv Hospital prioritizes patient safety and comfort.
• PET scans are used for detecting cancer cells and planning treatment.

Understanding PET Scans: Purpose and Procedure

A PET scan, or Positron Emission Tomography scan, is a high-tech medical imaging method. It gives important insights into how the body works. It’s key for checking health issues, like cancer.

What is a PET Scan?

A PET scan uses a radioactive tracer to see how the body’s cells work. The tracer goes into the body and sends out signals. These signals help make detailed images of the body’s inner workings.

Doctors say PET scans are great for looking at how tissues and cells work. This helps find and track diseases PET scan information.

The scan starts with a tracer injection into a vein. The tracer goes to areas with high activity, like growing cancer cells.

Common Reasons for Undergoing a PET Scan

PET scans are used for:

• Cancer diagnosis and staging
• Monitoring cancer treatment success
• Finding cancer that has come back
• Looking at neurological disorders, like Alzheimer’s
• Checking heart disease and heart tissue health

These scans give doctors the info they need to care for patients.

How PET Scans Differ from Other Imaging Tests

PET scans are different from CT scans or MRI because they look at how tissues work, not just their shape. This makes them very useful for:

“PET scans provide a window into the body’s metabolic processes, allowing for early detection and monitoring of diseases at a cellular level.” -Specialists note.

While CT scans and MRI show body structure, PET scans show how tissues and organs function. This is key for diagnosing and managing diseases where metabolic activity is important.

Knowing about PET scans helps patients get ready for their tests. It shows how these scans give important info.

Preparing for Your PET Scan Appointment

To have a smooth PET scan, knowing what to do beforehand is key. Getting ready right helps get accurate results and makes the experience less stressful for you.

Pre-Scan Instructions

Your healthcare provider will give you specific instructions before the PET scan. You might need to avoid certain medicines, wear comfy clothes, and remove metal items. It’s important to follow these steps to make sure the scan works well.

Dietary Restrictions Before the Scan

Your diet is important for the PET scan. You might need to fast or eat a special diet before the scan. Your healthcare provider will tell you exactly what to do based on your needs.

Dietary Requirement	Instructions
Fasting	Avoid eating or drinking anything except water for a specified period before the scan.
Special Diet	Follow a specific diet as advised by your healthcare provider to ensure accurate scan results.

What to Bring to Your Appointment

On the day of your PET scan, bring any important documents like insurance cards and ID. Also, wear loose, comfy clothes.

Transportation Planning Considerations

Planning how to get to and from the PET scan is important. Some people can drive home after, but others might need a ride. This depends on the scan’s effects or if sedation was used.

• Check with your healthcare provider if you can drive after the PET scan.
• Consider having a friend or family member accompany you.
• Be aware of any post-scan instructions that might affect your ability to drive.

The PET Scan Experience: Step by Step

The PET scan process has several steps, from getting ready to the actual scan. Knowing these steps can make you feel more at ease and ready for your visit.

Arrival and Initial Procedures

When you get to the scanning facility, you’ll need to fill out some paperwork. You might also have to change into a hospital gown. Our team will help you get ready by removing any metal items or jewelry that could get in the way.

Key steps upon arrival include:

• Completing any necessary paperwork
• Changing into appropriate attire
• Removing metal objects or jewelry

Radioactive Tracer Injection

The next step is getting a radioactive tracer injected into your arm. This tracer is a tiny amount of radioactive substance that lights up the areas being studied. The injection is quick and might feel a bit like a pinch or sting.

The radioactive tracer is key to the PET scan. It lets us see how your body’s cells are working. After the injection, you’ll wait for a bit to let the tracer spread through your body.

The Waiting Period

After the injection, you’ll wait for 30 minutes to an hour or more. This depends on the type of PET scan you’re having. You’ll rest quietly during this time to let the tracer spread evenly.

“The waiting period is a key part of the PET scan process. It lets the tracer spread fully, ensuring we get clear images.” -Imaging experts emphasize.

The Scanning Process

After waiting, you’ll go to the scanning room for the PET scan. You’ll lie on a table that slides into a big, doughnut-shaped machine. The scan is painless and usually takes 30 to 60 minutes.

During the scan:

1. You will be positioned on the scanning table
2. The table will move into the PET scanner
3. The machine will capture images of your body

Our staff will watch over you from another room. They can talk to you through an intercom system during the scan.

PET Scan Time: How Long to Expect

The PET scan process has several stages, each with its own time frame. Knowing these stages helps patients get ready for their appointment. It also helps them plan their day.

Typical Duration of Each Phase

A PET scan includes preparation, radioactive tracer injection, a waiting period, and scanning. The preparation phase, like registration and dressing, takes 15 to 30 minutes. Injecting the radioactive tracer is quick, taking just a few minutes.

The waiting period after injection can last from 30 minutes to an hour. This depends on the scan type and tracer used. The scanning itself is the shortest part, lasting 30 to 60 minutes. But, this can change based on the body area scanned and scan specifics.

Total Time Commitment

Patients should plan to spend at least 2 to 3 hours at the facility. This includes preparation, waiting after injection, and scanning. “It’s wise to bring something to read or work on during the wait,” says a nuclear medicine expert.

How Long Does a PET Scan Last for Diabetic Patients?

Diabetic patients’ PET scan times are similar to non-diabetic patients. But they must adjust their medication and fasting before the scan. Following their healthcare provider’s instructions is key for accurate results.

Factors That May Extend Your Appointment

Several things can make your PET scan longer. These include needing more imaging, delays in tracer injection, or special scan positions. “Sometimes, patients need to come back for more scans later,” a leading radiologist explains.

Understanding these factors and typical times helps patients prepare. It also helps them avoid schedule disruptions.

Can I Drive Myself Home After a PET Scan?

Many patients wonder if they can drive home after a PET scan. The answer depends on several factors, which we will discuss.

General Guidelines for Post-Scan Transportation

Usually, patients can drive home after a PET scan, unless they’ve had sedatives or feel bad. It’s key to listen to your healthcare provider or the PET scan facility’s advice. The radioactive tracer in PET scans usually doesn’t make it hard to drive.

When You Should Arrange Alternative Transportation

If you’ve had sedatives or feel sick, get a ride home. This keeps you and others safe on the road. Also, if you feel dizzy or nauseous, don’t drive.

Factors That May Affect Your Ability to Drive

Several things can affect your driving after a PET scan. These include:

• The type of radioactive tracer used
• Whether sedatives were administered
• Your overall health condition
• Any adverse reactions to the PET scan

Talk to your healthcare provider about these before your scan. This helps you decide how to get home.

Comparing Driving After PET Scans vs. Other Procedures

PET scans usually let you drive after, unlike some CT or MRI scans. But each scan is different, and rules can change. Always listen to your healthcare provider’s advice.

Knowing what affects your driving after a PET scan helps plan your visit. It ensures a safe and easy experience.

After PET Scan Care

After a PET scan, it’s important to follow certain care steps. This ensures your safety and the safety of those around you. Proper care can greatly improve your comfort and safety during recovery.

Hydration Requirements

Drinking plenty of water is key after a PET scan. It helps remove the radioactive tracer from your body. Try to drink 8 to 10 glasses of water a day.

Activity Restrictions

Most people can go back to their usual activities after a PET scan. But there are some things to avoid. Don’t do anything too strenuous or that might make you dehydrated. Also, try to stay away from pregnant women and young kids for the rest of the day.

Radiation Safety Precautions

Even though a PET scan uses a small amount of radiation, it’s wise to take some safety steps. Here are a few:

• Practice good hygiene, like washing your hands well after using the bathroom.
• Don’t share utensils or personal items.
• Keep your distance from others, like kids and pregnant women, for the rest of the day.

What to Do After a PET Scan: A Checklist

Here’s a checklist to help you recover smoothly:

Action	Details
Hydrate	Drink 8-10 glasses of water
Rest	Avoid strenuous activities
Limit Contact	Avoid close contact with pregnant women and children
Practice Good Hygiene	Wash your hands thoroughly after using the restroom

By following these steps, you can have a safe and comfortable recovery after your PET scan. If you have any concerns or questions, always talk to your healthcare provider for advice.

Can You Drive After a CT Scan? Comparing Post-Procedure Guidelines

After a CT scan, many wonder if they can drive home. This question shows the need to look at guidelines for different scans. CT scans and PET scans are used for diagnosis, but have different rules after the scan.

Standard Post-CT Scan Protocols

CT scans are usually quick and don’t hurt much. Most people can go back to normal right after. But, if dye was used, drinking lots of water is key to getting it out.

Key considerations after a CT scan include:

• Hydration: Drinking water to flush out the contrast dye, if used.
• Monitoring for any adverse reactions to the contrast dye, such as allergic reactions.
• Resuming normal activities unless instructed by a healthcare provider.

Differences Between PET and CT Recovery

PET scans use a radioactive tracer, which means different rules apply afterward. While CT scans are safe and quick, PET scans need more care because of the radioactive material.

Aspect	CT Scan	PET Scan
Use of Contrast/Radioactive Tracer	Contrast dye (optional)	Radioactive tracer
Post-Procedure Precautions	Hydration if contrast dye is used	Avoid close contact with others, pregnant women, and children for hours
Driving After the Procedure	Generally allowed unless sedation was used	Generally allowed but may be affected by sedation or the radioactive tracer

When Sedation Is Used in CT Scans

Sedation might be used for CT scans, like if you’re scared of tight spaces. If you’re sedated, don’t drive. You’ll need someone to take you home.

Special Considerations for Combined PET/CT Scans

For PET/CT scans, follow both scans’ rules. This means drinking water to get rid of dye and being careful with the radioactive tracer.

It’s important to know the differences for safety and comfort. Knowing what to expect helps prepare for the scan and recovery.

PET/CT Scan Side Effects: What to Watch For

PET/CT scans are usually safe, but some side effects can happen. We’ll talk about the common minor side effects, how long they last, and the rare serious reactions.

Common Minor Side Effects

Most people don’t feel much after a PET/CT scan. Some minor side effects include:

• Mild discomfort or pain at the injection site of the radioactive tracer
• Fatigue or feeling tired
• Nausea, though it’s rare
• Headache

These side effects are usually short-lived and don’t need special treatment.

How Long Do PET Scan Side Effects Last?

Side effects from PET scans can vary. Most minor side effects go away within a few hours. The tracer is removed from your body quickly through urine and feces.

Usually, you can go back to your normal activities soon after. Drinking plenty of water helps get rid of the tracer faster.

Rare but Serious Reactions

Though rare, serious reactions can happen. These include:

• Allergic reactions to the tracer, like hives, itching, or trouble breathing
• Severe nausea or vomiting
• Big changes in heart rate or blood pressure

If you have these symptoms, get medical help right away.

How You Might Feel After a PET Scan

After a PET/CT scan, many feel normal, with some feeling a bit tired. You might feel drained or have some discomfort where the tracer was injected. But these feelings usually don’t last long.

It’s important to follow your healthcare team’s post-scan instructions for a smooth recovery. If you’re worried about how you feel or have health concerns after the scan, reach out to your healthcare provider.

Conclusion: Ensuring a Safe and Smooth PET Scan Experience

Remember, being prepared is key for a safe PET scan experience. Knowing what to expect during and after helps avoid risks. This makes the process smoother for you and your pet.

It’s important to follow post-scan care guidelines. Stay hydrated, follow activity rules, and take safety precautions. Knowing about possible side effects helps you handle any issues that might come up.

Talk to your healthcare provider about any worries or questions. This way, you’ll feel ready and safe for your PET scan. You’ll know you’ve done everything to keep yourself and your pet comfortable.

FAQ

References

1. FDG PET/CT: EANM procedure guidelines for tumour imaging.” (n.d.). In PubMed Central.https://pmc.ncbi.nlm.nih.gov/articles/PMC4315529/
2. Boellaard, R., et al. (2025). 18F-FDG PET/CT: EANM procedure guidelines for tumour imaging. European Association of Nuclear Medicine / Society of Nuclear Medicine and Molecular Imaging. https://www.sciencedirect.com/science/article/pii/S3051292125000065