PET CT Scan Upper Body: Purpose & What to Expect

Learn about the PET CT scan for the upper body and its vital purpose in medical diagnosis, early detection, and accurate staging.

PET CT Scan Upper Body

PET CT scan is a non-invasive diagnostic procedure that is used to look for various abnormal conditions in the upper part of the body. This testing procedure includes:

• Head and neck regions
• Chest and lungs
• Mediastinum
• Lymph nodes
• Liver
• Upper abdominal organs
• Bones within the scanned region
• Soft tissues

What is the Purpose of PET CT Upper Body?

Doctors may recommend the test for:

• Detection of certain cancers
• Cancer staging
• Evaluation of lymph node involvement
• Detection of possible cancer spread
• Monitoring response to cancer treatment
• Assessment of suspected recurrence
• Evaluation of an abnormal mass or lesion
• Investigation of selected unexplained abnormalities
• Assessment of certain inflammatory conditions

PET CT for Cancer Detection

It may be used to evaluate cancers involving:

• Lung
• Head and neck
• Breast
• Oesophagus
• Lymphatic system
• Liver
• Other cancers involving the upper body

PET CT for Cancer Staging

The scan may help doctors evaluate:

• Primary tumour activity
• Nearby lymph nodes
• Distant lymph nodes
• Metastatic disease
• Bone involvement
• Other areas of abnormal tracer uptake

PET CT for Treatment Monitoring

It can help assess:

• Changes in metabolic activity
• Response to chemotherapy
• Response to radiation therapy
• Changes after other cancer treatments
• Possible residual active disease

How Is PET CT Upper Body Performed?

The procedure generally involves several steps:

• The patient is given a small amount of radioactive tracer, usually through an intravenous injection.
• The patient rests for a specified period to allow the tracer to distribute through the body.
• The patient is positioned on the PET CT scanner table.
• CT images are obtained first or according to the scanner protocol.
• PET images are then acquired.
• The images from both scans are combined to provide functional and anatomical information.
• The scanning process may take several minutes, while the complete appointment can take considerably longer because of tracer preparation and uptake time.

Preparation for PET CT Upper Body

• Fast for several hours before the examination.
• Drink plain water unless otherwise instructed.
• Avoid strenuous physical activity before the scan.
• Inform the healthcare team about diabetes or blood sugar problems.
• Follow instructions regarding medications.
• Avoid eating or drinking items that are not permitted before the scan.
• Bring previous imaging reports when requested.

Benefits of PET CT Upper Body

• Combines PET and CT imaging
• Provides functional and anatomical information
• Helps detect metabolically active abnormalities
• Useful for cancer staging
• Helps assess lymph node involvement
• Helps detect possible metastatic disease
• Supports treatment response assessment
• Can help evaluate suspected cancer recurrence
• Provides whole-region imaging according to the selected protocol
• Helps doctors make informed treatment decisions

PET CT Upper Body for Lymph Nodes

• Whether lymph nodes show abnormal metabolic activity
• The distribution of involved lymph nodes
• Whether disease may have spread beyond the primary site
• Changes in lymph node activity following treatment