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PET scans

March 29, 2016 | Author: | Posted in health and medicine, nutrition

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Positron emission tomography (PET ) scan – MayoClinic .com br br

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br Positron emission tomography (PET ) scan A positron emission tomography (PET ) scan is an imaging test that can detect changes within certain tissues or organs early , often before disease progresses A positron emission tomography (PET ) scan is a specific type of imaging test that can help your doctor see how the tissues and organs inside your body are functioning . Unlike other scanning techniques , a PET scan doesn ‘t produce clear structural images of organs . Instead , it shows images containing areas of more or less intense color to provide information about chemical activity within certain organs and tissues . This chemical activity may indicate areas of disease not detected by other scanning methods . In certain conditions , this may cause your doctor to alter treatment plans . PET scanning is important in determining neurological conditions , heart disease and the spread of cancer What is it for CLICK TO ENLARGE PET scan of the chest for cancer PET scan of the brain for depression PET scan of the brain for Alzheimer ‘s disease A PET scan is an effective way for your doctor to examine the chemical activity in certain parts of your body , particularly your brain and your heart . PET scanning may help detect abnormal areas in your body . In particular , a PET scan may be used to detect or monitor :Cancer . A PET scan can be particularly effective in identifying if you have cancer , if it has spread and if it has responded to treatment . Tumors often use more energy than healthy tissues do and may absorb more of a radioactive tracer , which allows the tumors to appear on the scan . In addition , PET scanning may be valuable in assessing the effectiveness of chemotherapy

PET scanning can also be used to determine the stage of a cancer . In the past , doctors could determine whether cancer had spread to the lymph nodes only if there was evidence of lymph node enlargement . With PET scanning , doctors may be able to detect cancer that has spread to a lymph node before enlargement occurs , allowing for a change to more appropriate treatment

However , PET scan test results need to be interpreted carefully because noncancerous conditions can resemble cancer . Only a biopsy can confirm the presence of cancer

br Heart problems . Doctors use PET scanning to detect areas of decreased blood flow in the heart . A PET scan may reveal early coronary artery disease and damaged or dead heart muscle due to a heart attack . It can also differentiate nonfunctioning dead heart muscle from poorly functioning heart muscle that would benefit from a procedure , such as heart surgery , angioplasty or coronary artery bypass surgery , to increase blood flow to heart muscle . A PET scan can be particularly important in people who ‘ve previously had heart attacks

Depression . PET scanning allows doctors and scientists to compare brain activity in people experiencing periods of depression with brain activity in nondepressed people . Studies show that depressed… [banner_entry_footer]

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