Pet Scan: Vital Timing For Your Best Care

When dealing with complex medical conditions, precise diagnostic information is key. We use a Positron Emission Tomography (PET) scan when we need detailed insights. These insights are important for patient care.

In cancer diagnosis, staging, and tracking treatment, a PET scan is vital. It gives us the information we need to change patient care plans. Knowing when to use this advanced imaging helps patients make better treatment choices.

Key Takeaways

• A PET scan is typically ordered when precise diagnostic information is needed.
• This advanced imaging technology is often used in cancer diagnosis and treatment.
• PET scans provide vital information for patient care and management.
• Understanding when a PET scan is ordered can help patients navigate their care pathways.
• Precise diagnostic information from a PET scan can impact treatment decisions.

What Is a PET Scan and How Does It Work?

PET scans, or Positron Emission Tomography, are a top-notch diagnostic tool. They have changed medicine a lot. They give detailed views of the body’s metabolic processes. This helps doctors diagnose and manage many health issues better.

Definition and Basic Principles of Positron Emission Tomography

Positron Emission Tomography (PET) is a high-tech medical imaging method. It uses a radioactive tracer. This tracer goes to areas with high activity, like growing cancer cells.

The tracer shows how different tissues and diseases work. It’s based on how much activity they have. This helps doctors see what’s going on inside the body.

The most used tracer is FDG (Fluorodeoxyglucose). It’s a special glucose molecule with a radioactive atom. Cancer cells use more glucose than normal cells, so FDG helps find cancer. But, it also shows inflammation or infection, making it useful for many conditions.

“PET scans have become an indispensable tool in oncology, allowing for the early detection and staging of cancer, as well as monitoring the response to treatment.”

Oncologist

Equipment and Technology Used in Modern PET Scanning

Today’s PET scanners are much better, thanks to new technology. They can see more clearly and accurately. One big improvement is combining PET with Computed Tomography (CT) and Magnetic Resonance Imaging (MRI). This makes systems like PET-CT and PET-MRI.

These systems mix PET’s functional info with CT or MRI’s body details. This gives a full picture of the body’s structure and how it works. The PET scanner detects the signals from the tracer. Special software then makes and analyzes the images.

Technology	Description	Benefits
PET-CT	Combines PET and CT scans	Provides both functional and anatomical information
PET-MRI	Combines PET and MRI scans	Offers superior soft tissue contrast and functional information

Knowing how PET scans work helps everyone understand their value. They are a key tool in managing many health issues.

General Medical Criteria for Ordering a PET Scan

PET scans are a key tool in medicine, but they must follow strict rules to help patients. We use guidelines to decide when a PET scan is needed. This depends on the patient’s health history, current state, and how it might affect treatment.

Evidence-Based Need for Precise Diagnostic Information

Deciding to use a PET scan is about getting detailed information that other tests can’t provide. We look at the patient’s health and history to see if a PET scan will give us the insights needed for treatment planning.

In cancer cases, PET scans show how far the disease has spread. This is key for figuring out the stage and treatment plan. The need for accurate info guides our use of PET scans.

Condition	PET Scan Utility	Impact on Treatment
Cancer Diagnosis	Identifies disease extent and spread	Informs staging and treatment planning
Neurological Disorders	Assesses brain activity and function	Guides diagnosis and treatment of conditions like Alzheimer’s
Cardiac Disease	Evaluates coronary artery disease and myocardial viability	Influences revascularization decisions

The Critical Factor: Will Results Change Patient Management?

Deciding on a PET scan also depends on whether it will change treatment. We think about if the scan’s findings will change how we treat the patient. If not, we might choose other tests.

This way, PET scans are used wisely. They give us info that really helps in caring for patients. By focusing on treatment changes, we make the most of this tool.

Physician Referral Process for PET Scans

Getting a PET scan involves careful review by doctors. Doctors check the patient’s health and decide if a PET scan is needed. They look at the patient’s history, symptoms, and past test results.

After deciding on a PET scan, the doctor makes a formal referral. This might involve talking to specialists and checking insurance. It makes sure PET scans are used correctly and follow medical rules.

PET Scan Applications in Cancer Diagnosis and Staging

PET scans have changed how we diagnose and stage cancer. They show how tumors work and where they spread. This tool is key in helping doctors make the best choices for patients.

Initial Cancer Detection and Characterization

PET scans are key in finding and understanding cancer early. They spot tumors by showing where cells are most active. This helps catch cancers when they’re easier to treat.

A study in the Journal of Clinical Oncology shows PET scans help find lung cancer early. This early detection is key to saving lives and improving chances of recovery.

Determining Cancer Stage and Spread

Knowing how far cancer has spread is vital for treatment planning. PET scans are great at finding cancer in lymph nodes and other parts of the body. This info helps doctors plan the best treatment.

A comprehensive assessment of cancer spread helps tailor treatments. For example, if cancer is in many lymph nodes, doctors might suggest stronger treatments like chemo or radiation.

Cancer Type	PET Scan Application	Benefits
Lung Cancer	Early detection and staging	Improved treatment outcomes
Lymphoma	Staging and response assessment	Tailored treatment strategies
Colorectal Cancer	Recurrence detection	Early intervention

Impact on Treatment Planning Decisions

PET scans greatly influence treatment choices. They show how active cancer cells are and how far they’ve spread. This helps doctors pick the best treatment, like surgery, chemo, or radiation.

“PET scans have become an essential tool in cancer management, providing valuable information that guides treatment decisions and improves patient outcomes.”

Oncologist

In summary, PET scans are vital in cancer diagnosis and staging. They offer detailed insights into tumor activity and spread. This helps doctors create better treatment plans, leading to better care and outcomes for patients.

Monitoring Cancer Treatment Response with PET Scans

PET scans are key in checking how well cancer treatments work. They look at how tumors change, helping doctors see if treatments like chemo and radiation are effective.

Evaluating Effectiveness of Chemotherapy

Chemotherapy is a common cancer treatment. PET scans help see if chemotherapy is working by checking cancer cell activity. If activity goes down, it means treatment is likely working well.

• PET scans spot early changes in tumor activity during treatment.
• This lets doctors adjust treatment plans quickly if needed.
• It helps avoid using ineffective chemo for too long.

Radiation Therapy Response Assessment

PET scans also check how well radiation therapy works. They look at tumor activity before and after treatment. This helps doctors see if the therapy is effective.

1. PET scans are done before radiation to set a baseline.
2. After treatment, PET scans show how well the radiation worked.
3. Changes in tumor size and activity show if treatment was successful.

Detecting Recurrence After Treatment

PET scans are also vital in finding cancer that comes back after treatment. Regular PET scans can spot recurrence early, when it’s easier to treat.

• PET scans find metabolic changes that show cancer is coming back before it’s seen on scans.
• Finding recurrence early means treatment can start sooner.
• This can greatly improve patient outcomes and quality of life.

Specific Cancer Types Where PET Scans Are Commonly Ordered

PET scans are key in managing many cancers. They help doctors diagnose, stage, and monitor treatment. This makes patient care better and treatment more effective.

Lung Cancer Evaluation and Management

PET scans are vital in lung cancer. They check if lung nodules are cancerous. This helps decide the best treatment.

They also help figure out if surgery is needed. This way, patients get the right treatment without unnecessary surgeries.

Lymphoma Staging and Response Assessment

PET scans are very useful in lymphoma. They help stage the cancer and check how well treatments work. They can spot cancer coming back early.

This lets doctors adjust treatments as needed. It ensures patients get the best care for their cancer.

Colorectal Cancer Recurrence Detection

PET scans find colorectal cancer coming back. They’re used when tumor markers rise or other scans suggest cancer. They pinpoint where the cancer is, helping plan treatment.

Spotting cancer early means better treatment options. This can lead to better outcomes for patients.

Melanoma, Breast, and Head and Neck Cancers

PET scans also help with melanoma, breast, and head and neck cancers. They check how far melanoma has spread and find breast cancer coming back. For head and neck cancers, they help stage and see how treatments work.

Cancer Type	Primary Use of PET Scan	Benefits
Lung Cancer	Diagnosis, Staging	Accurate assessment of disease spread, guides treatment decisions
Lymphoma	Staging, Treatment Response	High sensitivity for assessing lymphoma activity, guides treatment adjustments
Colorectal Cancer	Recurrence Detection	Early detection of recurrence, enables timely intervention
Melanoma, Breast, Head and Neck Cancers	Varies by cancer type	Assesses disease extent, evaluates treatment response, detects recurrence

PET scans are very important in cancer care. They give doctors the info they need to plan the best treatments. This leads to better care and outcomes for patients.

 

How PET Scans Improve Cancer Management Decisions

PET scans help doctors make better choices for cancer treatment. They show how active tumors are, which is key for planning treatment.

The Impact of PET Scans on Treatment Plan Changes

PET scans can change treatment plans in up to 30% of cases. They give clear info on tumor size and activity. A Kaiser Permanente document highlights their value in cancer care.

PET scans help doctors:

• Check if current treatment is working
• Spot when treatments might not work
• Change treatment plans as needed

Avoiding Unnecessary Surgeries

PET scans can prevent unnecessary surgeries. They show how big and spread out tumors are. This helps doctors decide if surgery is needed.

The benefits of PET scans include:

1. Improved accuracy: They give detailed metabolic info, better than some other tests.
2. Better patient selection: They help pick the right patients for surgery.

Guiding Precision Medicine Approaches

PET scans are key in precision medicine for cancer. They give detailed info on tumor activity. This helps doctors find the best treatment for each patient.

PET scans help in precision medicine by:

• Finding specific tumor biomarkers
• Tracking how well targeted therapies work
• Adjusting treatment based on tumor activity

In summary, PET scans are vital in cancer care. They help make better treatment choices, avoid unnecessary surgeries, and guide precision medicine.

Cardiac Indications for PET Scan Ordering

Cardiac PET scans are key in managing heart disease. They give detailed views of the heart’s health. This helps doctors make better choices for patient care.

Evaluating Coronary Artery Disease

PET scans are often used to check for coronary artery disease (CAD). They measure blood flow to the heart and spot damaged areas. This info is vital for choosing the right treatment.

Key benefits of using PET scans for CAD evaluation include:

• High sensitivity for detecting CAD
• Ability to quantify myocardial blood flow and reserve
• Guidance for revascularization decisions

Determining Myocardial Viability Before Revascularization

PET scans are important for checking if the heart can recover before surgery. They find out if parts of the heart can work again with treatment. This helps doctors choose the best treatment and avoid risks.

The process involves:

1. Administering a radioactive tracer that accumulates in viable myocardium
2. Imaging the heart to assess tracer uptake and distribution
3. Analyzing the results to determine the extent of viable myocardium

Diagnosing Cardiac Sarcoidosis and Inflammatory Conditions

PET scans help diagnose and manage heart inflammation and scarring. They spot inflammation and scarring in the heart. This info guides treatment and tracks the disease.

Advantages of PET scans in this context include:

• High sensitivity for detecting cardiac inflammation
• Ability to monitor treatment response and disease activity
• Guidance for immunosuppressive therapy

When Are PET Scans Ordered for Neurological Conditions?

PET scans are key in neurology, helping diagnose and manage complex conditions. They give us insights into brain function and metabolism. This is vital for diagnosing and treating neurological disorders.

Alzheimer’s Disease and Dementia Evaluation

PET scans are essential in diagnosing Alzheimer’s disease and other dementias. They show brain activity and amyloid plaque, signs of Alzheimer’s. Recent updates say these scans are useful when a patient’s cognitive decline is unclear when clinical evaluation is uncertain.

Using PET scans helps doctors:

• Distinguish between different types of dementia
• Assess the extent of brain involvement
• Monitor disease progression over time

Parkinson’s Disease and Movement Disorders

PET scans help assess dopamine function in the brain for Parkinson’s disease and other movement disorders. This is key for diagnosing Parkinson’s and differentiating it from other syndromes. PET imaging can also help in evaluating the effectiveness of treatments aimed at improving dopaminergic function.

Epilepsy Focus Localization Before Surgery

In epilepsy, PET scans are used to find the seizure focus before surgery. They identify abnormal brain activity, helping determine if surgery is suitable. This precise localization is critical for successful surgery.

Brain Tumor Assessment and Treatment Planning

PET scans help manage brain tumors by assessing tumor grade, extent, and metabolic activity. They differentiate between tumor recurrence and radiation necrosis, guiding treatment. The integration of PET imaging into treatment planning can significantly impact patient outcomes.

In conclusion, PET scans are vital in neurology, guiding diagnosis and treatment of complex conditions. Understanding when to use them helps clinicians provide better care for their patients.

The Complete PET Scan Procedure

Learning about the PET scan process can ease worries and prepare patients well. We walk our patients through each step, from getting ready to after the scan. This makes the whole experience smoother.

Pre-Scan Preparation Requirements

Before a PET scan, patients must follow certain steps for the best results. Fasting is usually needed for 4 to 6 hours before the scan. This can change based on the scan type and doctor’s orders. Also, avoiding hard activities and some medicines is important.

Telling your doctor about diabetes or glucose issues is key. For diabetics, controlling blood sugar is critical. The medical team will give specific advice.

Radioactive Tracer Administration

The PET scan uses a radioactive tracer injected into the body. This tracer goes to active areas, like growing cancer cells. The tracer type depends on the scan’s needs, with Fluorodeoxyglucose (FDG) being common.

After the injection, patients wait about 60 minutes for the tracer to spread. They need to stay calm and not move much for the best results.

The Scanning Process and Duration

The actual scan takes 30 to 60 minutes. Patients lie on a table that moves into the scanner. The scanner captures the tracer’s signals, making detailed body images.

It’s important to stay very quiet during the scan for clear images. Sometimes, extra scans are done to get more info.

Post-Scan Care and Precautions

After the scan, patients can usually go back to normal activities unless told not to. Drinking lots of water helps get rid of the tracer. They might be a bit radioactive for hours afterward, but it’s usually okay.

We tell patients to follow any post-scan instructions from their doctor. This keeps them safe and ensures accurate results.

Understanding PET-CT and PET-MRI Hybrid Imaging

Hybrid imaging, like PET-CT and PET-MRI, is changing how we diagnose diseases. It mixes PET’s functional info with CT or MRI’s body details. This combo helps us see the body’s structures and how they work, which is key in fighting cancer.

Benefits of Combined Anatomical and Functional Imaging

Mixing PET with CT or MRI brings many benefits. It makes diagnosis more accurate and helps plan treatments better. This mix lets doctors see how far a disease has spread and plan treatments that target it more precisely.

Key advantages of hybrid imaging include:

• Enhanced diagnostic accuracy through the combination of functional and anatomical information
• Improved treatment planning by providing a more detailed understanding of disease extent
• Better assessment of treatment response through precise monitoring of changes in metabolic activity and anatomical structures

A leading expert says, “The integration of PET with other imaging modalities has transformed the field of oncology, enabling more precise and personalized treatment approaches.“

Clinical Scenarios Where Hybrid Imaging Is Preferred

PET-CT and PET-MRI are great for many situations, like checking cancer spread, seeing how treatments work, and studying brain disorders. For example, PET-CT is often used to track cancer in lymphoma and lung cancer.

PET-MRI shines in soft tissue tumor and brain condition checks. It gives clearer images and uses less radiation than CT.

Radiation Exposure Considerations

PET-CT uses radiation from the PET tracer and CT. But PET-MRI cuts down on this by using MRI instead. This is good for kids and those needing many scans.

We need to think about the good and bad of hybrid imaging. We should aim to use as little radiation as possible, following the ALARA principle.

Strategies to minimize radiation exposure include:

1. Using low-dose CT protocols when feasible
2. Opting for PET-MRI in appropriate clinical scenarios
3. Carefully selecting the PET tracer and dosage

Interpreting PET Scan Results and Findings

Understanding PET scan results is key for accurate diagnosis and treatment planning. We analyze the images and data to find areas of concern and assess disease extent.

Understanding Standardized Uptake Values (SUVs)

Standardized Uptake Values (SUVs) are important in PET scan results. SUVs measure the uptake of the radioactive tracer in tissues. A higher SUV often means increased metabolic activity, which can be cancerous.

But, we must consider the clinical context. Some benign conditions can also show high SUVs. Factors like patient preparation and scanner calibration can affect SUV values.

Common Findings and Their Clinical Significance

PET scans can show various findings, from normal to abnormal. Abnormal findings include increased tracer uptake, which may indicate cancer, infection, or inflammation. The location, intensity, and pattern of uptake are key to understanding these findings.

In cancer staging, PET scans help identify tumors, assess lymph node involvement, and detect metastases. This information is vital for treatment planning and predicting prognosis. PET scans also monitor treatment response, showing changes before anatomical changes are visible.

False Positives and False Negatives

PET scans are not perfect and can have false positives and negatives. False positives occur when a scan indicates disease when there is none, often due to inflammation. False negatives happen when a scan misses existing disease, possibly due to small size or low metabolic activity.

It’s important to understand these limitations for accurate interpretation. We must consider PET scan results with the patient’s overall clinical picture. This approach helps avoid misinterpretation and ensures proper care for patients.

PET Scan Cost and Insurance Coverage Considerations

Understanding the cost and insurance coverage of PET scans is key. It helps patients make informed decisions.

Average Cost of PET Scans in the United States

PET scan costs in the U.S. vary a lot. This depends on where you are, the facility, and the type of scan. On average, prices range from $1,000 to $5,000 or more. Costs are affected by the equipment, the tracer, and the doctor’s expertise.

Key factors influencing PET scan costs include:

• The type of PET scan (e.g., PET-CT or PET-MRI)
• The facility where the scan is performed (hospital, outpatient center, or private clinic)
• Geographic location
• The expertise of the interpreting physician

Medicare Guidelines for PET Scan Coverage

Medicare covers PET scans under certain conditions. It covers scans for diagnosing or staging cancer, checking heart health, or neurological conditions. Patients must meet specific criteria and have a doctor who participates in Medicare.

Important Medicare coverage details include:

1. Coverage is typically provided for cancer diagnosis and staging
2. Cardiac PET scans are covered for assessing myocardial viability
3. Neurological PET scans may be covered for certain conditions like Alzheimer’s disease

Private Insurance Authorization Requirements

Private insurance plans vary in PET scan coverage. Many require pre-authorization. Patients should check with their insurance to understand the requirements and any costs they may face.

Steps to ensure coverage include:

• Verifying that the PET scan is covered under the patient’s plan
• Obtaining pre-authorization if required
• Understanding any deductibles, copays, or coinsurance

Financial Assistance Options for Patients

Patients facing financial challenges have options. Hospitals and imaging centers offer financial help or sliding scale fees. Patient advocacy groups and non-profit organizations also provide resources for financial support.

Assistance Option	Description
Financial Assistance Programs	Offered by hospitals and imaging centers to reduce costs for eligible patients
Sliding Scale Fees	Fees adjusted based on the patient’s income level
Patient Advocacy Groups	Organizations that provide resources and support for navigating medical expenses

Limitations and Contraindications of PET Scans

PET scans have many benefits but also some limits and things they can’t do. Doctors must think carefully about these to make sure they are safe and work well.

Pregnancy and Breastfeeding Concerns

PET scans use a little bit of radiation. This is a worry for pregnant and breastfeeding women. “The risks of radiation to the fetus or baby must be balanced against the scan’s benefits,” says doctors need to be careful.

Women who are pregnant or breastfeeding should talk to their doctor about these risks. They should discuss the scan’s benefits and other ways to find out what’s wrong.

Diabetes Management Challenges

People with diabetes need to control their blood sugar before and after a PET scan. High blood sugar can make the scan less accurate. Keeping blood sugar in check is key for good scan results in diabetic patients, doctors say.

Diabetic patients should work with their healthcare team to manage their blood sugar before the scan.

Radiation Exposure Considerations

PET scans use radiation, which is a concern for those needing many scans. We must think about the scan’s benefits and the risks of radiation. The dose from a PET scan is usually 4 to 7 mSv, depending on the tracer and scan protocol.

Patients with Allergies to Radioactive Tracers

Some people might be allergic to the radioactive tracers in PET scans. “It’s important to handle allergic reactions to PET tracers to avoid bad outcomes,” doctors stress the need for careful patient checks before scanning.

We tell patients to tell their doctor about any allergies or sensitivities before a PET scan. This helps doctors take steps to avoid allergic reactions.

Comparing PET Scans to Other Diagnostic Imaging Modalities

Understanding the differences between PET scans, CT scans, and MRI is key for accurate diagnosis. Each modality offers unique information important for patient care.

PET vs. CT Scans: When to Choose Each

PET and CT scans are both important tools, but they’re used for different things. CT scans show detailed anatomy, great for finding structural issues. PET scans, though, show how active body parts are, which helps in cancer diagnosis.

Choosing between PET and CT scans depends on what you’re looking for. For example, PET scans are better for seeing how active tumors are. But, if you need to see the structure of organs, a CT scan is better.

PET vs. MRI: Functional vs. Structural Information

MRI gives detailed images without radiation. It’s all about structure. PET scans, on the other hand, show how active tissues are.

Using PET-MRI combines both benefits. It’s great for complex cases needing both structural and functional info.

When Alternative Imaging Is Preferred

PET scans are great for some cases, but not all. For example, ultrasound is often first for gallbladder or vascular diseases. It’s non-invasive and doesn’t use radiation.

For detailed anatomy without functional data, CT or MRI might be better than PET scans. The right choice depends on the clinical question and patient needs.

Recent Advances in PET Scan Technology and Applications

PET scan technology is changing how we diagnose and treat diseases. It offers better accuracy and personalized care. These changes are key to improving patient outcomes.

New Radioactive Tracers and Their Uses

New radioactive tracers are a big step forward in PET scans. They target specific biological processes. This means doctors can diagnose and monitor diseases more precisely.

For example, Fluorodeoxyglucose (FDG) helps see how active tumors are. New tracers can spot certain cancers, brain disorders, and heart issues better. This opens up new uses for PET scans in hospitals.

Improved Resolution and Detection Capabilities

Today’s PET scanners have better detectors and algorithms. This means they can spot smaller problems and get a clearer picture of diseases.

When PET scans are combined with CT and MRI, they get even better. This mix gives doctors both the function and structure of the body. It helps in making more accurate diagnoses and treatment plans.

Emerging Applications in Personalized Medicine

PET scans are key in personalized medicine. They give detailed info on disease biology. This helps doctors tailor treatments to each patient.

PET scans are also used in clinical trials. They help find out how well new treatments work. As PET tech keeps improving, we’ll see more ways it helps in personalized medicine.

Questions to Ask Your Doctor About Your PET Scan

Patients should ask questions about their PET scan to have a smooth and informed experience. A PET scan is a detailed diagnostic tool that gives important health information.

Preparation and Procedure Questions

It’s important to know what to do before a PET scan. You might ask your doctor:

• What are the specific preparation instructions, such as dietary restrictions or medication adjustments?
• How long does the PET scan procedure take, and what can I expect during the scan?
• Will I need to undergo any additional procedures, such as a CT or MRI scan, as part of my PET scan?

A well-known radiologist says, “Clear communication between the patient and healthcare provider is key to a successful PET scan experience.” This includes understanding the preparation and procedure to minimize anxiety and ensure the scan’s effectiveness.

Results and Follow-up Questions

Understanding your PET scan results and follow-up steps is important. You might ask:

• How long will it take to receive my PET scan results, and who will communicate them to me?
• What do the results indicate about my condition, and what are the next steps in my treatment plan?
• Are there any additional tests or scans required to further assess my condition or monitor treatment response?

Understanding your PET scan results is key to making informed decisions about your care. The American Cancer Society notes, “PET scans can significantly impact treatment planning by providing detailed information about the metabolic activity of tumors.”

Insurance and Cost Clarifications

Understanding the financial aspects of a PET scan can be tough. It’s wise to ask your doctor or their staff:

• Is my PET scan covered under my current insurance plan, and are there any out-of-pocket expenses I should be aware of?
• Are there any additional costs associated with the PET scan, such as fees for radiologists or facility charges?
• Can you provide any guidance on financial assistance programs or resources that may help offset the costs?

“Transparency about costs and insurance coverage can significantly reduce the financial stress associated with medical procedures,” says a spokesperson for a leading healthcare advocacy group.

By asking the right questions, you can be well-prepared for your PET scan and know what to expect.

Conclusion

We’ve looked into PET scans, a key tool in medical imaging. A PET scan helps doctors understand and treat many health issues. It gives them the info they need to make the best decisions for patients.

Knowing when and how PET scans are used helps both patients and doctors. They show how PET scans help in finding cancer, checking the heart, and studying the brain. This makes them very useful in today’s medicine.

As medical tech gets better, PET scans will play an even bigger role. They will help us find new ways to improve health. We can count on PET scans to help doctors make better choices for their patients.

FAQ

Reference

Aetna. Clinical Policy Bulletin 0071. https://www.aetna.com/cpb/medical/data/1_99/0071.html

Alzheimer’s Association. Updated Appropriate Use Criteria for Amyloid and Tau PET. https://www.alz.org/news/2025/updated-appropriate-use-criteria-amyloid-tau-pet

Kaiser Permanente. PET/CT Oncology Utilization Management. https://healthy.kaiserpermanente.org/content/dam/kporg/final/documents/health-plan-documents/notice/utilization-management/pet-ct-oncology-mas-en-2025-utilization-management.pdf

American Cancer Society. PET Scan. https://www.cancer.org/cancer/cancer-diagnosis/diagnostic-tests/pet-scan.html

JAMA Network. Research Article. https://jamanetwork.com/journals/jamaoncology/fullarticle/2782197