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Doctor insights on: Thyroid Scan With Technetium 99m

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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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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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I'm being injected with technetium-99m for a hida scan, what to expect?

I'm being injected with technetium-99m for a hida scan, what to expect?

Gall bladder test: The patient is injected intravenously with tc99m hida (radiotracer). The patient lies on table with scaning camera over anterior abdomen. First part of study shows extracction of tracer from blood stream, visualization of gb and bowel.(30-40 min) patient receives slow injection of cck to stimulate gall bladder contraction. (60 min more imaging). Sometimes discomfort possibly related to gb disease. ...Read more

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Hida scan shows 17% function @ 20 min. No pain during exam 4.3 m of technetium 99m of choletec. 1.5mcg of cck. Bilirubin is 1.5 enzymes good.

Hida scan shows 17% function @ 20 min. No pain during exam 4.3 m of technetium 99m of choletec. 1.5mcg of cck. Bilirubin is 1.5 enzymes good.

Not sure of results: Most laboratories determine ejection fraction, percentage of emptying at 30 or 60 minutes after injection of cck. I am not sure meaning of ejection fraction at 20 minutes. ...Read more

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What are the benefits of using technetium-99m for medical tracing instead of x-rays?

What are the benefits of using technetium-99m for medical tracing instead of x-rays?

Funct. vs. anatomic: Nuclear medicine involves using internal irradiation in order to define function of various organ systems of body,. Some isotopes are injected iv, inhaled, and some ingested. Most diagnostic nuclear medicine procedures involve low doses of radiation. The isotopes of higher doses are used to treat thyroid diseases or cancer. Benefits are from diagnosis of abnormality that can be detected/ treated. ...Read more

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Do I need to stop methimazole before thyroid technetium scan?

Do I need to stop methimazole before thyroid technetium scan?

YES!: You need to be off methimazole at least 4-7 days before the scan. Check w/your doctor before stopping the anti-thyroid drugs and with the nuclear medicine doc before scheduling the scam. ...Read more

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What does a thyroid scan do?

What does a thyroid scan do?

Thyroid scan: It's a nuclear medicine scan use to evaluate how well your thyroid is working. The result will give information on the size, shape, location and the overall activity of the gland. It can also tell you if a thyroid nodule is functioning or non-functioning and help your doctor determine whether a nodule biopsy is needed. More info with the link below:
http://www.Webmd. Com/a-to-z-guides/thyroid-scan. ...Read more

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How expensive is it to get a thyroid scan?

How expensive is it to get a thyroid scan?

Depends: Usually this is covered by your insurance. If you get a radioiodine thyroid scan it will be more expensive than a tc99m pertechnetate scan. Are you getting a scan alone or scan plus uptake? That will affect costs. I am estimating that you are looking at costs in the range of a hundred to several hundred dollars but these costs are generally set by the administration / management and not physician. ...Read more

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What do I have to do before my thyroid scan?

What do I have to do before my thyroid scan?

If hyperthyroidism: If you are having a diagnostic dose of i-123 (usually 200 microci), you should stop taking anti-thyroid medications (methimazole and ptu) and make sure you didn't have iodine-based IV contrast (used in ct scans) in the prior 6-8 weeks. For a diagnostic study a low-iodine diet is not require, unless you are going to receive i-131 treatment shortly after the test. ...Read more

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What should I have to do after my thyroid scan?

What should I have to do after my thyroid scan?

Resume daily life: If thyroid scan was performed with iodine 123 or technetium 99m pertechnetate involves a low amount of radiation. The half-lives are short enough (13 and 6 hours) that most irradiation will have dissipated by 24-48 hours. Whatever i123 does not accumulate in thyroid gland are excreted via kidneys, saliva, and sweat. Tc 99m usually exits via kidneys, GI tract, and saliva. I131 involves higher dose. ...Read more

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What is the definition or description of: thyroid scan?

What is the definition or description of: thyroid scan?

Thyroid function: 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 are used for confirmation. ...Read more

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What does a thyroid scan check for?

What does a thyroid scan check for?

Different things: We use thyroid scans to help distinguish between functioning and non-functioning thyroid nodules, to assess activity of the thyroid for purposes of ablation in cases of grave's disease, to follow up patients who've had their thyroid glands removed because of cancer. ...Read more

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Cn thyroid scan diffrentiate between benign n malignant follicular neoplsm?

NO : Hi. Nope, you need tissue (cells). Either an FNA for cytology (which may be non-diagnostic) or a surgical biopsy. Scan adds nothing to the diagnostic evaluation ...Read more

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Would a thyroid scan rule out everything no matter what the blood test resuslts were?

Would a thyroid scan rule out everything no matter what the blood test resuslts were?

No: Thyroid scan is only part of thyroid dysfunction workup. Thyroid scan usually shows functioning or nonfunctioning nodules, thyroid gland enlargement, decreased function, or goiter. Laboratory blood testing is extremely important in determining function of thyroid gland, hypo-, hyper-, or normal. Sometimes scan and blood tests differ in findings. ...Read more

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I'm due to have a thyroid scan in 3 days. Yesterday, I took two 25 mg antihistamine pills. Will this affect the results?

I'm due to have a thyroid scan in 3 days.  Yesterday, I took two 25 mg antihistamine pills.  Will this affect the results?

No, it should not.: The half-life of most antihistamines should be less than 24 hrs and should be out of the system by then. I would check with the radiology center to confirm their policy. I would also avoid any more antihistamines until the time of testing. ...Read more

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How is the thyroid scan performed?

How is the thyroid scan performed?

2 types of "scans": Thyroid ultrasounds are quick and painless. They are done with some jelly on the neck and sound waves are used to visualize the thyroid and surrounding tissues. Nuclear medicine scans are done by swallowing a small amount of radioactive iodine. After some time, the iodine finds its way to thyroid tissue and "lights up" on the scan. This is painless, safe, but does take a while. Best wishes. ...Read more

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What's the purpose of thyroid scan?

What's the purpose of thyroid scan?

A thyroid scan: Uses a radioactive tracer and a special camera to measure how much tracer the thyroid gland absorbs from the blood. A thyroid scan can show the size, shape, and location of the thyroid gland. It also finds areas that are overactive or underactive and to evaluate possible masses that may be felt or seen with ultrasound. ...Read more

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When getting a thyroid scan, what's the procedure?

When getting a thyroid scan, what's the procedure?

Thyroid scan..: There are two types of nuclear thyroid scan. One involves IV injection of a tracer. The other involves ingestion of a radioactive iodine pill. The pill is more common.... Usually you will be told not to consume foods with high iodine content for a few days before scan. 1st day you ingest the pill and you come back the next day for images of the neck on a gamma camera and calculation of uptake. ...Read more

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What is the definition or description of: thyroid scan with i 123?

What is the definition or description of: thyroid scan with i 123?

Thyroid evaluation: The isotope iodine 123 is ingested by patient. It is absorbed into blood stream and accumulates in the thyroid gland. The function of gland is determined by uptake of isotope by gland, increased (hyper), normal, or decreased (hypo). The structure of the gland is visualized showing size, location, and texture (homogeneous or nodular). Nodules can be hypo- or hyperfunctioning, benign or malignant. ...Read more

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What's the low iodine diet for the thyroid scan?

What's the low iodine diet for the thyroid scan?

Preparation: Some diagnostic centers ask patients to undergo a 2 week low-iodine diet prior to a thyroid uptake and scan. This is because the study uses radioactive iodine (i-123 or low i-131) for the test. The iodine contained in food (seafood, table salt, etc.) may compete with the iodine used for the study, and thus results may be biased. Ideally, for the study your thyroid gland should be "hungry" for iodine. ...Read more

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Dr. Sheila Smith
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