endocrine test out

a parathyroid adenoma will concentrate in which of the following RPx?

sestamibi

which of the following may result in a decreased thyroid uptake value?

autoimmune thyroiditis

what is the patient prep for an I-131 therapy?

a low iodine diet 1 week before the therapy

which of the following drugs would be given if a patient has an elevated T3 and T4?

propylthiouracil

during organification, iodide is ____ to iodine and incorporated into ____

oxidized; iodotryosine

I-131 metaiodobenxylguadidine is used to treat?

metastatic pheochromocytoma

during thyroid uptake, a tech collects the thyroid counts 5 cm from the surface of the patient's neck and the standard at 20 cm from the surface of the phantom. what is the effect on the thyroid uptake value calculated?

uptake will be falsely increased

the following CPM were obtained from a thyroid uptake test. what is the percent uptake?

thyroid : 2867

patient bkg : 563

standard : 10,111

room bkg : 124

23%

the lobes of the thyroid are connected by the ____.

isthmus

which of the following sites in the body are known to concentrate pertechnetate to a level greater than that of plasma?

salivary, gastric, thymus

solitary cold nodule found during radio-iodine imaging of the thyroid in an otherwise normal thyroid is most likely indicative of what?

primary thyroid carcinoma

if ectopic thyroid tissue is suspected, the technologist can expect to find it most commonly in which of the following areas?

mediastinum

one of the three basic approaches to selecting the dose of I-131 to be administered as therapy for hyperthyroidism is?

a dose based on millicuries per kilogram of thyroid tissue

a dose based on selecting the organification rate of thyroid

a dose based on selecting rad absorbed dose to the thyroid

patient has a possible pheochromocytoma. the tech should prepare to image the ____?

adrenal gland

when performing thyroid imaging, using an electronic zoom....

is NOT preferred over using a pinhole collimator

whole body imaging with I-131 sodium iodide is optimally performed how long after tracer administration?

48-72 hours

what food should patients avoid 1 week prior to iodine imaging of thyroid?

seafood

pertechnetate can be used for thyroid imaging because it is...

trapped by the thyroid gland (not organified)

nurses caring for I-131 therapy patients who require isolation should be advised that the major sources of contamination include what?

saliva, urine and perspiration

if a female patient is breastfeeding and needs I-131 therapy for the treatment of thyroid cancer, how long must the patient suspend breast feeding?

may not resume breastfeeding with this child

how long after administration of a dose of pertechnetate for a thyroid study should you image?

20 minutes

functioning thyroid tissue is sometimes found?

at the base of the tongue, along the esophagus, and in the mediastinum

a patient is scheduled for adrenal medullary imaging, what is the preferred RPx?

I-123 MIBG

which of the following monitoring techniques should be employed to rule out internal contamination of a technologist after handling a radio-iodine solution?

thyroid uptake 24 hours after handling

when looking at the blood test results in a chart of a patient with hyperparathyroidism, a technologist will most likely see evidence of?

elevated serum calcium

indications for thyroid scanning include?

presence of palpable abnormality

presence of ectopic thyroid tissue

following thyroidectomy to determine extent and location of residual functioning thyroid tissue

when using a Tc sestamibi double phase study for imaging the parathyroid gland, after the early phase, the tech should repeat the images ____ after injection?

90-120 minutes

when performing a radio-iodine thyroid uptake will an uptake probe, the most appropriate collimator to use is a?

flat field collimator

secondary hyperthyroidism is the result of a deficiency of which of the following?

TSH

when performing a radio-iodine uptake, non-thyroid background measurements may be taken over the?

thigh

after thyroidectomy, a patient is referred to the nuc med department for imaging. for effective evaluation and identification of residual thyroid tissue or tumor, the tech should review the patients recent medical history to determine if the patient has taken the steps to raise the plasma ____ level?

TSH

when performing a T3 suppression test, the patient is given?

T3 for approximately 7 days

pertechnetate is preferred over I-123 when?

a patient had CT with contrast

TRH is secreted by the?

hypothalamus

the condition known as myxedema is typically due to severe, prolonged?

hypothyroidism