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Doctor insights on: How Does Metal Affect The Results Of A Pet Scan

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How does metal affect the results of a pet scan?

How does metal affect the results of a pet scan?

Usually not much: Metal can block the gamma rays that are emitted by the patient, and block the xrays from the ct portion of the pet/ct, which can create errors on one portion of the exam (called the attenuation corrected scan). However, the original pet data from the scan (uncorrected) is always available for review, so if the standard images have artifact on them, the uncorrected images can be reviewed. ...Read more

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Dr. Guido Davidzon
291 doctors shared insights

Pet Scan (Definition)

Pet scans most often use a radioactive form of glucose, the energy source for most of the cells in our bodies. The pet scanner can detect and measure how much of the radioactive glucose analog, f-18 fdg, is in a particular organ or region. The areas using more glucose are hyper metabolic and generally more worrisome. Our brains and sometimes hearts prefer glucose as food, making ...Read more


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Could you tell me what this print out of a pet scan results means ?

Could you tell me what this print out of a pet scan results means ?

Discuss with doctor.: It is best to discuss your pet scan results with your physician so that you can be sure that you have a detailed and correct understanding of the scenario. If you have any specific questions, be sure to have them clarified. Without the results, it is difficult to answer your question. Hope this helps. ...Read more

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How do pet scans work? My wife is scheduled for a pet scan and i was wondering how it works. Is this a good test relative to the other kinds of tests you can do? Is it accurate? Do you know how long it usually takes to get the results back?

How do pet scans work? My wife is scheduled for a pet scan and i was wondering how it works.  Is this a good test relative to the other kinds of tests you can do? Is it accurate? Do you know how long it usually takes to get the results back?

Positrons -Really!!: A pet/ct looks at the function of the body. Radioactive drugs (usually a glucose analog) distribute based on differences in function, release a positron (antimatter), which is destroyed by combining with an electron, making an x-ray we detect. Follow the directions the imaging center gives exactly, because patient prep is critical to getting the best test. Pet/cts are usually read the same day. ...Read more

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Pet scan results were fine so why do they want me to have a bronchial scope done ?Wouldn't the scan have shown any spread to the lymph nodes already ?

Pet scan results were fine so why do they want me to have a bronchial scope done ?Wouldn't the scan have shown any spread to the lymph nodes already ?

Not necessarily : Pet scans can prevent lymph node biopsies when they are positive, but when staging disease a negative "scan" does not exclude metastasis ( particularly if lung cancer metastasis is the question). ...Read more

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What will happen to my pet scan result if i cannot keep myself warm before the exam?

What will happen to my pet scan result if i cannot keep myself warm before the exam?

Don't worry: Tell the pet scan attendants how cold you are and they will provide you with blankets. Most radiology centers try to make the exam experience as pleasant as possible. ...Read more

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Which is better, pet scan or cisternogram? Father already had a cisternogram results borderline positive. Should pet scan be done or repeat cisterno

Different tests: Cisternography is used to determine if there is normal pressure hydrocephalus. It looks at the flow of CSF fluid. Pet scans are for looking at the brain cells and associated pathology. ...Read more

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PET scan to investigate a Right Hilar enlarged lymph node1.4cmX.9cm Results: residual thymic tissue mild activity SUV 1.5. This normal? I reCT in 4mo

PET scan to investigate a Right Hilar enlarged lymph node1.4cmX.9cm Results: residual thymic tissue mild activity SUV 1.5. This normal? I reCT in 4mo

Possibly: SUV of 1.5 is normal to maybe reactive. This makes it very unlikely to be worrisome. The follow up CT should be improved or no change ...Read more

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Stress test on 7-10-2015. I went today for the results. They said the scans were normal and no blockages. The DR wants me to do PET scan now because even though the results were normal my BP was 150/100 right before and 120/80 after. Is that normal?

 Stress test on 7-10-2015. I went today for the results. They said the scans were normal and no blockages. The DR wants me to do PET scan now because even though the results were normal my BP was 150/100 right before and 120/80 after. Is that normal?

Talk w/ your doctor: A PET scan of the heart is a non-invasive imaging test that uses radioactive tracers to produce pictures of your heart. These images can help Dx heart disease or clarify areas of concern that may not have been completely seen on your EKG stress test. Talk with your doctor. Express your question with the desire to know why the test was ordered and how the result will affect mgmt of your health. ...Read more

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Oncology: How long after a Whipple operation can a patient still have a slightly annoying pain as a result of inflammation as seen on a PET scan?

Oncology: How long after a Whipple operation can a patient still have a slightly annoying pain as a result of inflammation as seen on a PET scan?

Weeks: Since the Whipple requires several anastomosis, there is the potential for slight and temporary leaks. These areas should be drained at the time of surgery and include suturing the common duct to small bowel, and implanting the transected body of pancreas into jejunum. These sites are well known to cause, even with good drainage, temporary leakage setting up inflammation seen on scan. ...Read more

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Before start of stress test bp was 150/100 (not usually so high) After treadmill bp 120/80. Results show no blockages, now want pet scan to re test?

Before start of stress test  bp was 150/100 (not usually so high) After treadmill bp 120/80. Results show no blockages, now want pet scan to re test?

It's precaution. : An elevated blood pressure is always a concern as it can cause heart to become stiff. Although your pressure became normal afterwards but the fact that it was high in the beginning means that you have a high stress and your heart reacts to that. ...Read more

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What can a Heart PET Scan diagnos ? If it is Abnormal result, what is the outcome needed procedure or treatment plan ?

Heart perfusion: A heart PET scan evaluates the blood flow to the heart. It can also detect prior damage and give information on the overall function of the heart. This test is not widely used in cardiac evaluations, thus addressing an abnormality on the scan would depend on why your doctor recommended the scan for you. ...Read more

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Post op seminoma, in r testicle. Pet scan done for suspecious nodes. Pet scan result shows negative for any abnormalility. This means no seminoma?

Post op seminoma, in r testicle.  Pet scan done for suspecious nodes. Pet scan result shows negative for any abnormalility. This means no seminoma?

Surveillance: A negative pet scan means there is no accumulation of cancer cells large enough to be discernible by the pet scanner. There is a resolution limit of about 7mm in size to be seen, some are better now. I am not trying to scare you, but your doctor i'm sure will continue to caution you and continue surveillance for a period of time safe to say you are cancer-free. ...Read more

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What could cause a reduced glucose metabolism in a PET scan?that was my result.It was done bcause I have 30 inactive cns lesions and anxiety for years

What could cause a reduced glucose metabolism in a PET scan?that was my result.It was done bcause I have 30 inactive cns lesions and anxiety for years

Brain injury.: reduced glucose metabolism is caused by poorly functioning or dead brain tissue due to any type of injury or insult, such as stroke, MS, brain injury...... the brain is very resiliant and other parts of the brain take over for parts of the brain that are injured. specially in the younger pateints. i have a boy who literally lost 1/2 of his brain due to a nearly lethal brain injury, fully recove ...Read more

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Hi, if pet scan results for pancreatic cancer are negative after treatment is this mean that the patient was recovered completely ?

Hi, if pet scan results for pancreatic cancer are negative after treatment is this mean that the patient was recovered completely ?

No: The medical definition of a cure is usually no cancer present for 5 years after the end of treatment. PET scans can miss small tumors and can also give a falsely negative results for other reasons. That being said, it is a positive sign, better chance of a cure than if cancer were still present, obviously. ...Read more

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Interventional Radiology: About how long after an IRE for cancerous tumor til a CT/PET scan is done to ascertain the results?

Interventional Radiology: About how long after an IRE for cancerous tumor til a CT/PET scan is done to ascertain the results?

What is IRE?: It is best to avoid abbreviations...they can only delay interpretation of what is wrong and where it is! As for your answer to your question... your oncologist is in a better position to address them than an interventional radiologist. ...Read more

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Can there be a difference in a CT and pet scan of 1mm in the results of a lung nodule?

Can there be a difference in a CT and pet scan of 1mm in the results of a lung nodule?

Yes: There are differences in techniques between the ct scan with a pet scan and a general ct scan. Additionally, radiologists may measure a nodule slightly differently. Please look at a ruler and realize just how small 1 mm is. Radiologists routinely are measuring things less than 1 cm or about 3/8 of an inch. ...Read more

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