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46 Cards in this Set
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- 3rd side (hint)
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A false negative parathyroid scan can be caused by:
A. Previous parathyroidectomy B. Poor positioning C. Not performing a computer subtraction study D. All of the above |
B
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1
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The function of the parathyroid gland is to:
A. Regulate interstitial fluids B. Organify calcium C. Regulate calcium ion concentration D. Trap and organify calcium |
C
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2
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In primary hyperparathyroidism the cause is usually:
A. Thyroid cancer B. Parathyroid nodule C. Parathyroid adenoma D. Parathyroid calcification |
C
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3
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Which radiopharmaceutical provides minimal washout from the parathyroid adenoma up to 2 hrs post injection?
A. I-123 sodium iodide B. I-131 sodium iodide C. Tc99m pertechnetate D. Tc99m sestabimi |
D
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4
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Parathyroids are:
A. Located at the base of the neck B. Imbedded in the thyroid gland C. In the thoracic cavity D. Next to the parotid glands |
B
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5
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If ectopic thyroid tissue is suspected the Technologist can expect to find it most commonly in which of the following areas?
A. In the brain B. At the base of the tongue C. In the mediastinum D. B or C |
D
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6
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Patients presented with a parathyroid implant should include an image of the:
A. Leg B. Chest C. Forearm D. Neck |
C
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7
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In the Tc99m Sestamibi subtraction protocol the parathyroid scan phase starts:
A. 4 hrs post administration of I-123 B. 10-15 minutes post injection of Tc99m Sestamibi C. 2-3 hrs post injection of Tc99m Sestamibi D. Immediately following the administration of I-123 |
B
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8
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A parathyroid adenoma in the Tc99m Sestamibi subtraction protocol is interpreted by:
A. An decrease in activity in the thyroid over time B. A fixed or increasing area of activity over time C. Complete absence of thyroid tissue over time D. Visualization only during the parathyroid phase |
B
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9
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The recommended dose of Tc99m Sestamibi is:
A. 100 microcuries B. 1-5 mCi C. 10-15 mCi D. 20-25 mCi |
D
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10
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In the Tc99m Sestamibi I-123 NaI subtraction protocol the dose of I-123 is:
A. 1 mCi B. 20-25 mCi C. 100 microcuries D. 200 microcuries |
D
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11
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The thyroid phase of imaging in the Tc99m Sestamibi I-123 subtraction protocol is started at:
A. Immediately following the administration of I-123 B. Immediately following the injection of Tc99m Sestamibi C. 4 hrs following the administration of I-123 D. At 2-3 hrs following the injection of Tc99m Sestamibi |
C
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12
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Thyroid tissue rising from the isthmus or medial aspect of one lobe is called the:
A. Middle lobe B. Isthmal lobe C. Pyramidal lobe D. Trithyroid lobe |
C
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13
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Markers using Tc99m or Co57 point sources on thyroid images are for:
A. Anatomical references B. Exact size determination of nodules C. Exact size determination of the thyroid D. Surgical reference |
A
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14
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Following total thyroidectomy total body imaging with radioiodine normally will demonstrate tracer concentration in which of the following areas?
A. Liver, lungs, bones B.salivary glands, stomach, bladder C. Liver, salivary glands, stomach, lungs D. Bladder, liver, brain |
B
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15
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When performing a radioiodine thyroid uptake, nonthyroidal(body) background measurements may be taken over the:
A. Lateral skull B. Mediastinum C. Abdomen D. Thigh |
D
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16
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Thyroid uptake using I-123 are usually made at____post administration
A. 6 hrs B. 4 & or 24 hrs C. 24 & 48 hrs D. 1hr |
B
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17
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Routine views for the thyroid scan include:
A. Posterior and obliques B. Anterior C. Anterior and obliques D. Anterior and both laterals |
C
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19
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When performing a thyroid uptake all of the following are true except:
A. Make sure there is no interfering background radiation B. Use the patients thigh for the patient background C. The distance from the patient to the detector does not effect the uptake D. Be sure the patient does not move during the uptake |
C
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20
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Thyroid uptake is determined by which equation:
A. (Thyroid-body bkgd/capsule - room bkgd) x 100 B. (Thyroid - capsule/body bkgd - room bkgd) x 100 C. (Thyroid /capsule -room bkgd) x 100 D. Capsule -room bkgd/thyroid -body bkgd) x 100 |
A
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21
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When calculating the patients uptake at which point do you need to use the decay factor?
A. When a standard capsule is utilized for the uptake counts B. When the patients capsule alone is used for determination of uptake C. When you have a duplicate capsule for counting D. In the event the patient was not given a capsule |
B
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22
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Calculate 24 hr uptake
Thyroid. 245,000 com Patient bkgd. 1,200 com Standard capsule. 1,142,000 com Background. 56 cpm |
245,000-1200/1142000-56
243,800/1,141,944 =.21 x100= 21% |
24
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Calculate 24 hr uptake:
Thyroid. 27,540 Pt bkgd. 597 Capsule. 1,382,000 Bkgd. 59 Note:24 hr dacay factor= .284 |
27,540-597/(1,382,000 x. 284) - 59
27,540-597/(392,488-59) 27,540-597/(1,382,000 x. 284) - 59 27,540-597/392,429 = .07 x 100 = 7% |
27
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Patient preparation for thyroid imaging and uptake studies is:
A. No prep required B. Fasting 4 hrs C. Fasting 4 hrs before, 2 hrs after and no thyroid medications D. No thyroid medications |
D
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28
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When ectopic thyroid tissue is suspected_________________should be obtained
A. An anterior view of the chest B. A lateral view of the neck C. A lateral view of the chest D. An oblique of the neck, where the tissue is suspected |
A
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29
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A CT scan using iodinated contrast media is performed on a patient. What effect would this have on a I-123 thyroid uptake performed 3 days later?
A. Increase the radiopharmaceutical uptake B. Decrease the radiopharmaceutical uptake C. Decrease the imaging time D. No effect |
B
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30
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The half life of I-123 is:
A. 7 hrs B. 13 hrs C. 24 hrs D. 8 days |
B
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31
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The standard dose for thyroid uptake using I-123 is:
A. 100-200 uCi B. 10-20 mCi C. 2-5 mCi D. 30 mCi |
A
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32
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In performing a thyroid uptake the patients thyroid is counted at 5cm from the surface of the neck and the neck phantom from 20 cm. What is the effect on the thyroid uptake value collected from this data?
A. The uptake value will be falsely increased B. The uptake value will be falsely decreased C. The uptake value will be accurate D. The results will be within 25% of the expected values |
A
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33
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Imaging for I-123 thyroid scan usually begins at:
A. Immediately B. 4 or 24 hrs post administration C. 24 or 48 hrs post administration D. 72 hrs post administration |
B
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34
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Whole body imaging for thyroid metastases utilizes which radiopharmaceutical?
A. Tc99m Sestamibi B. I-125 sodium iodide C. I-131 sodium iodide D. Gallium |
C
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35
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Imaging for whole body thyroid metastases begins _____after radiopharmaceutical administration
A. 4 hrs B. 24 hrs C. 48 hrs D. 78 hrs |
B
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36
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Utilization of Thyrogen, external TSH, allows the patient to:
A. Remain on thyroid medication B. Discontinue their medications without side effects C. Have increased uptake of metastatic lesions D. Have a better target to background ratio |
A
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37
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After a therapeutic dose has been administeted to an impatient and radiation isolation has begun
A. Meals must be brought to the patients room on disposable food trays with disposable utencils B. All items in the isolation room are considered contaminated C. All authorized individuals entering the isolation room must follow specific instructions D. All of the above |
D
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38
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Which of the following best describes the characteristics of the radiation emitted by I-131?
A. Pure B emitter B. Pure gamma emitter (662keV) C. Combined B (Emax~807) & gamma (364 keV) D. Positron emitter |
C
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39
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Which of the following practices will help to minimize radiation exposure to others?
A. Avoid close contact with children and pregnant women for 4-6 days B. Avoid public places and transportation where the patient is likely to have close contact with others for 2-9 days D. Sleep in separate beds for 4-6 days E. All of the above |
E
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40
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What is the main consideration for the release of patients administeted with high-dose I-131?
A. The proximity of the patients home to the hospital B. Radiation exposure of the public and family members C. Radiation sickness effects that the patient may experience D. I-131 released into the local sewer system from the patient's home |
B
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41
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Which types of thyroid carcinomas are the most iodine avid and best suited to I-131 therapy?
A. Anaplastic thyroid cancers B. Medullary thyroid cancers C. Poorly differentiated anaplastic and medullary thyroid cancers D. Well differentiated thyroid cancers: papillary and follicular |
D
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42
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Patients receiving I-131 therapy doses for Graves disease receive a single dose designed to deliver:
A. 200 uCi I-131 x gram weight of gland/24 hour uptake B. 80 uCi I-131 x gram weight of gland/24 hour uptake C. 80 uCi I-131 x gram weight of gland/4 hour uptake D. 200 uCi I-131 x gram weight of gland/4 hour uptake |
B
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43
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The term radiation ablation refers to:
A. Radiation therapy of distal thyroid metastases B. Destruction of functioning thyroid tissues in the thyroid bed (neck C. The suppression of TSHG D. All of the above |
B
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44
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DTPA is extracted from the vascular system by means of:
a. tubular secretion b. Glomerular filtration c. Tubular fixation d. water re-absorption |
B
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45
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MAG3 is extracted from the vascular system by means of
a. Tubular secretion b. Glomular filtration c. Tubular fixation d. Water re-absorprtion |
A
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46
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Imaging in patients with renal failure for flow and function the perferred radiopharmaceutical is:
a. Tc DTPA b. Tc MAG3 c. Tc DMSA d. Tc Gluco |
B
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47
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The renal split function is determined at what point on the time activity curve:
a. 1-2 minutes b. 5 minutes c. 5-10 minutes d. 20 minutes |
A
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48
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Lasix administered dose in a diuretic augmented renogram is determined by:
a. 0.25 mg/kg b. 0.5 mg/kg c. 1 mg/kg d. 2 mg/kg |
B
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49
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ACE inhibitor renogram require the pre-administion of which pharmaceutical
a. Captopril b. Lasix c. Pentagatrin d. Diamox |
A
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50
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