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Importance of a PET scan - to diagnose and
Identify Cancer
PET (Positron Emission Tomography) scan
PositronEmission Tomography(PET) is a
powerful imaging technique inRadiation
Oncology that holds great promisein the
diagnosisand treatment ofmany diseases,
particularlycancer. A non-invasive test, PET
scans accuratelyimagethecellular function
of thehuman body. In a single PET scan
your physiciancanexamineyour entire
body. PET scanning providesa morecompletepicture, making it easier for
your doctor to diagnoseproblems, determinetheextent of disease,
prescribetreatment, and trackprogress.

2. PET (Positron EmissionTomography) and CT (Computed Tomography)
scans areadvanced imaging techniquesthatphysiciansuseto locateand
pinpoint diseasestatesin the body. A PET scan shows the biological
functionof thebody before anatomicalchangestakeplace, while the CT
scan providesinformationabout thebody’sanatomysuch as size, shape
and location. By combining thesetwo scanning technologies, a PET/CT
scan enablesphysiciansto moreaccuratelydiagnoseand identifycancer,
heart diseaseand braindisorders.
A PET scanhelps in detecting the
abnormalitiesofthose areas of the
body where chemicalactivityis
happening. Thisscanis most effectively used for those people who have
braindisorders, cancer or heart disease.
Brain disorders : The different areasof the brainhaving majorityof
activitieswhileperforming varioustaskscanbe revealed by a PET scan.
Specific brainabnormalitiescanalso be evaluated by thisscan that
includes:
 Seizures
 Memory disorders
 Tumors

3. Cancer : Bright spot of cancer cells can be seen in a PET scan due to their
high metabolism rateascompared tonormalcells. The scan helps in
determining:
 Whether the cancer has recurred
 The response of the cancer to the treatment
 The spread and extent of some cancers
A proper interpretationofthe PET scansis required as some non-cancerous
conditionsmaylook like cancer. It is also possiblethat certaincancer types
may also not appear on PET scans. Following arethe different cancer types
that will appear on PET scans such as:
 Thyroid
 Brain
 Pancreatic
 Lymphoma
 Breast
 Melanoma
 Lung
 Cervical
 Esophageal
 Colon
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