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Doctor insights on: Technetium Thyroid Scan

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How+is+thyroid+ scintigraphy +uptake+imaging+with+technetium+99m+calculated+and+performed+technically+patient+preparation ?

How+is+thyroid+ scintigraphy +uptake+imaging+with+technetium+99m+calculated+and+performed+technically+patient+preparation
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Thyroid uptake/scan: Is a nuclear medicine test performed to evaluate the structure and function of the thyroid. Technetium 99m pertechnetate is a radioactive material that is taken up (like iodine) in the thyroid. The radiotracer is injected into the bloodstream and a detector is used to measure the uptake. A special camera is used to generate a picture of the thyroid to assess the structure. ...Read more

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Thyroid Scan (Definition)

The patient ingests radioactive iodine or has intravenous injection of radiotracer technetium to define structure, size, and function of thyroid gland. Overactive ( hyperthyroid) normal, and underactive thyroid glands are determined. Sometimes autoimmune conditions and tumors of the gland can be suspected. Correlative imaging ultrasound, mr imaging, and blood tests ...Read more


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Test results are multinodular goiter so radionuclide thyroid scan?

Test results are multinodular goiter so radionuclide thyroid scan?

Need more info: Not sure what you mean by "test results" but u cannot know that u have multinodular goiter from a blood test. A thyroid ultrasound can give u this diagnosis in which case u will need a blood test called TSH to know what to do next. No thyroid scan needed unless the TSH is low. Thyroid ultrasound vs. Biopsy might be needed depends on the size and characteristics of the nodules but need more info. ...Read more

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Tsh level 5.58, no symptoms, u/s found 1cm subtle hypoechoic nodule w/increased peripheral vascularity. Pcp ordered rai uptake scan before fna. Why?

Tsh level 5.58, no symptoms, u/s found 1cm subtle hypoechoic nodule w/increased peripheral vascularity.  Pcp ordered rai uptake scan before fna.  Why?

I have no idea: Hi. It's not a hyperactive nodule...we know that from the TSH. I'd go straight to an FNA. The scan will show a "cold" nodule, which we already know it is, and will not help differentiate benign from cancer. FNA cytology (hopefully with gene testing) is all you need at this point. Good luck. ...Read more

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Is thyroid nuclear scan a better test than ultrasound of the thyroid ?

Is thyroid nuclear scan a better test than ultrasound of the thyroid ?

Different no better: A thyroid nuclear uptake and scan is a functional test of your thyroid. It is useful in differentiating causes of thyrotoxicosis (excessive amounts of thyroid hormones in the body). A thyroid ultrasound is better to assess the anatomy of the thyroid gland and for guidance if biopsy is needed. ...Read more

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Abdominal cat scan showed "homogeneous contrast enhancement", pancreas related, insulinoma?

Abdominal cat scan showed "homogeneous contrast enhancement", pancreas related, insulinoma?

Discuss with doctor: The description you gave is a little vague. The best thing to do is review the study with your doctor or with the radiologist that read the ct scan. ...Read more

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Thyroid ultrasound showed heterogenous echogenicity hypervascular thyroid. Thyroid labs normal. Any thoughts on what this is?

Thyroid ultrasound showed heterogenous  echogenicity hypervascular thyroid. Thyroid labs normal. Any thoughts on what this is?

See endocrinologist: It is unclear why these studies are being done, especially if thyroid blood tests are normal. You should see an endocrinologist to have him/her interpret these tests. That ultrasound is consistent with hashimotos thyroiditis. ...Read more

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Is thyroid nuclear scan a better investigation than ultrasound?

Is thyroid nuclear scan a better investigation than ultrasound?

Different no better: A thyroid nuclear uptake and scan is a functional test of your thyroid. It is useful in differentiating causes of thyrotoxicosis (excessive amounts of thyroid hormones in the body). A thyroid ultrasound is better to assess the anatomy of the thyroid gland and for guidance if biopsy is needed. ...Read more

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What heart scan is better, CT scanner or ultra scan?

What heart scan is better, CT scanner or ultra scan?

UltraSOUND: I think you mean cardiac ultrasound (also known as echocardiography). They look at different things. Echo sees over all function, wall thickness, chamber dimensions, valves, and can measure blood flow and pressure. Ct is for detecting calcium and looking at the coronary arteries. ...Read more

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Will the radioactive iodine capsule work for my thyroid uptake scan?

Will the radioactive iodine capsule work for my thyroid uptake scan?

YES: An uptake value will be established. Uptake can be low, normal, or high. Scan will be diagnostic if enough iodine localizes in the thyroid gland. Large amounts of stable iodine from iodized salt and ocean seafood can compete with radiodine and decrease uptake. ...Read more

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Brain meningioma CT scan why kidney function test?

Brain meningioma CT scan why kidney function test?

The dye: With ct scan there is an injection of a dye that could affect the kidneys. The kidney function is checked routinely because the risk of damage from the dye goes high if there is some kidney problems. ...Read more

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Nuclear cardiology stress test--how much radiaiton?

Nuclear cardiology stress test--how much radiaiton?

Radiation exposure: There most certainly is radiation exposure with nuclear cardiology stress testing whether it is with thallium, sestamibi, or any of the pet imaging agents. The exposure is minimal but real and the risk vs. Benefit to the patient needs to be considered before ordering the study. Pregnant women should not have these studies and young women can have a very small but increased risk of breast cancer. ...Read more

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Are isotope bone scans safe ?

Are isotope bone scans safe ?

Very safe: Injection of isotope technetium 99m mdp and visualization of skeleton looking for areas of abnormal uptake. Side effects include sometimes some bleeding from injection site. Isotope usually does not cause any allergic reaction. Lie down on table with cameras taking images of skeleton. Relax. ...Read more

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Ct scan, mri, nuclear medicine imaging, ivp scan, how are they different?

Ct scan, mri, nuclear medicine imaging, ivp scan, how are they different?

Quite different: Ct involves xray type radiation with cross sectional imaging in transaxial, sagittal, and coronal projections. Nuclear medicine, internal irradiation either injected intravenously, inhaled, ingested, injected subcutaneously.Ivp uses injection of contrast material for visualization of kidneys and bladder with x-ray. Mr imaging uses no ionizing radiation magnetic fields to generate x-sectional images. ...Read more

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Low TSH Borderline low T4 normal t3 (liothyronine). Thyroid uptake scan..low uptake noted w\o nodules. Radiologist said HYPOTHYROIDISM?! All other possible test norm

Low TSH Borderline low T4 normal t3 (liothyronine). Thyroid uptake scan..low uptake noted w\o nodules. Radiologist said HYPOTHYROIDISM?! All other possible test norm

Need follow-up: All laboratory results need to be interpreted in the clinical context and the doctor who ordered the tests is usually in the best position to do that. Having said that, there is inconsistency in your results. Both TSH and T4 being low does not add up. You may need to repeat the lab tests, not necessarily the scan, in about 6 months to see what direction these results are going in. ...Read more

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How will a radioactive iodine uptake test diagnose goiter?

It will not: An i131 test does not "diagnose" goiter. Goiter is just a term meaning an enlarged and/or nodular thyroid. An i131 scan is a "fucntional" scan. It is used to determine if a nodule within the thyroid is "hot" - picks up a lot of iodine: hyper-metabolic. A "cold" nodule does not concentrate the iodine: hypometabolic. There is a lower risk of thyroid cancer in "hot" nodules. ...Read more

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No risk for thyroid nuclear scan?

No risk for thyroid nuclear scan?

None.: The amount of tc99m or iodine given is a small dose and does not pose a health risk for a radioactive thyroid scan. ...Read more

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How is pet CT scan done?

How is pet CT scan done?

PET/CT scan: You need to fast for 4 hours first, then you will recieve an injection of a small amount of radioactive glucose (i.e. Sugar). Next you will sit in a recliner chair for about 70 minutes to allow the glucose to distribute throughout you. Then you will lie on your back on the pet/ct scanner (a tunnel shaped machine) for 20 minutes. There are no side effects from the test or restrictions afterwards. ...Read more

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Dr. Erik Borncamp
13 doctors shared insights

Thyroid (Definition)

The thyroid is an endocrine gland that sits in the lower part of the neck. It produces thyroid hormone - which ...Read more