SPECT scan preparation

Overview

A SPECT scan (Single Photon Emission Computed Tomography) is a type of imaging test that uses a small amount of radioactive material and a special camera to create detailed 3D pictures of how your organs and tissues are working. It is often used to check blood flow in the heart or brain.

SPECT scans are a common diagnostic tool used in hospitals to assess conditions like coronary artery disease, epilepsy, and Alzheimer's disease.

People who need to evaluate blood flow to the heart or brain, or who have symptoms like unexplained chest pain, memory loss, or seizures.

Symptoms

Common symptoms

• Chest pain or discomfort
• Shortness of breath
• Memory problems or confusion
• Unexplained seizures

Symptoms in children

• Seizures or epilepsy that is hard to control
• Developmental delays or unexplained neurological symptoms

Symptoms in older adults

• Chest pain or tightness
• Sudden changes in memory or behaviour
• Unexplained fainting spells

Causes

Main causes

• A SPECT scan is ordered to look for problems with blood flow in the heart or brain.
• Abnormal results can be caused by narrowed or blocked arteries, reduced blood flow, or changes in brain activity.

Risk factors

• High blood pressure
• High cholesterol
• Diabetes

When to see a doctor

See a doctor urgently if:

• If you have sudden chest pain, trouble breathing, or signs of a stroke – call your local emergency number immediately.
• If you have a seizure for the first time or one that lasts longer than 5 minutes.

Book a routine appointment if:

• If you have ongoing symptoms like chest pain, memory problems, or seizures that your doctor is evaluating.
• To discuss your SPECT scan results and next steps.

Diagnosis

The SPECT scan itself is part of the diagnosis. It provides images that help doctors see how well blood flows to your heart or brain. The results are interpreted by a specialist (radiologist or nuclear medicine doctor) and shared with your referring doctor.

Tests that may be done

• A resting SPECT scan to check blood flow at rest
• A stress SPECT scan (using exercise or medication) to see how blood flow changes with activity

What to expect at your appointment

You will have a small injection of a radioactive tracer. After a short wait, you will lie on a table while a camera takes pictures from different angles. You may be asked to exercise on a treadmill or receive a medication that makes your heart work harder. The scan is painless and you will be able to resume normal activities afterwards.

Treatment

Treatment depends on the condition found by the SPECT scan. For heart problems, it may include lifestyle changes, medications, or procedures. For brain conditions, treatment may involve medications, therapy, or surgery. Your doctor will explain the best options for you.

Self-care at home

• Follow your doctor's advice on diet, exercise, and medication.
• Stay active and manage stress to support heart and brain health.
• Avoid smoking and limit alcohol.

Medical treatments

Your doctor may recommend medications to control blood pressure, cholesterol, or seizures, or to improve blood flow. These treatments are tailored to your specific condition and nothing is prescribed without a full discussion with your healthcare team.

When is surgery considered?

Surgery is not typically needed after a SPECT scan alone, but if the scan reveals a serious blockage or abnormality, your doctor may discuss procedures such as angioplasty (opening narrowed arteries) or bypass surgery.

Living with this condition

After a SPECT scan, you can usually return to your normal routine immediately. The radioactive tracer leaves your body naturally within 24 hours. Drink plenty of water to help flush it out.

Lifestyle tips

• Eat a heart-healthy diet rich in fruits, vegetables, and whole grains.
• Get regular exercise, as advised by your doctor.
• Manage stress through relaxation techniques like deep breathing or meditation.

Diet and exercise

A balanced diet and moderate exercise (like brisk walking for 30 minutes most days) can improve heart and brain health. Your doctor can give you a plan that suits your abilities.

Mental health and emotional wellbeing

Waiting for test results can be stressful. It's normal to feel anxious or worried. Talk to your doctor about your concerns, and reach out to friends, family, or a counsellor if you need support.

Prevention

You cannot prevent the need for a SPECT scan, but you can prepare properly by following your doctor's instructions about diet, medication, and avoiding caffeine.

Complications

If left untreated

• If a heart condition like reduced blood flow is not treated, it can lead to a heart attack.
• If a brain condition like reduced blood flow is not treated, it can lead to a stroke or permanent damage.

Long-term outlook

The outlook is generally good when conditions are caught early. A SPECT scan can help your doctor make a timely diagnosis and start effective treatment. Many people live full, healthy lives after treatment.

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