Review test Flashcards
(43 cards)
Which of the following bodies regulates the use of investigational pharmaceuticals?
(a) NRC
(b) DOT
(c) IRB
(d) FDA
D
In the event of a spill of 99mTc to clothes, one should immediately:
(a) Enter a shower fully clothed
(b) Remove and store the clothes until they decay to background
(c) Wash the clothes in hot water and then survey them to determine remaining activity
(d) Remove and destroy the clothing
B
If a radiopharmaceutical is spilled on the floor, the first priority is to:
(a) Contact the Radiation Safety
Officer
(b) Pour a chelating solution over the area of the
(c) Cover the area with absorbent paper and restrict access around it
(d) Call the housekeeping department to arrange for cleaning
C
The inverse square law, in words, says:
(a) If you double the distance from the source of activity, you reduce exposure to 25% of the original intensity.
(b) If you halve the distance from the source of activity, you decrease exposure to 25 % of the original intensity.
(c) If you halve the distance from the source of activity, you decrease exposure to one-fourth of the original intensity.
A
What is the best way to
decrease the radioactive dose to visi-tors if a patient is surveyed to emit 3 mR/h at bedside?
(a) Have the patient wear lead aprons
(b) Keep the patient well hydrated and encourage frequent voiding.
(c) Have the visitor sit or stand as far as possible from bedside.
(d) Have the visitor wear lead shielding.
C
Which of the following isotopes would be effectively shielded by a plastic syringe?
(a) 67 Ga
(b) 89 Sr
(c) 99m Tc
(d) 81m Kr
(e) 133 Xe
B
Which of the following should be used when administering an intravenous pharmaceutical to a patient?
(a) Lead syringe shield
(b) Leaded eyeglasses
(c) Gloves
(d) All of the above
(e) (a) and (b) only
C
Which of the following is the most effective means of
measuring low levels of removable radiation?
(a) By performing an area survey
(b) By performing a wipe test
(c) With a pocket dosimeter
(d) With a TLD
B
Which of the following measures absorbed doses?
(a) mCi
(b) Becquerel
(c) Gray
(d) All of the above
C
If the dose rate at 3 m from a radioactive source is 100
mrem/h, what will the dose rate be at 6 m?
(a) 25 mR/h
(b) 50 mR/h
(c) 75 mR/h
(d) 12.5 mR/h
A
The philosophy of the ALARA program is to keep the radiation dose:
(a) As low as recently authorized
(b) As long as reasonably attained
(c) As long as reasonably acceptable
(d) As low as reasonably achievable
D
All of the following are critical factors in keeping radiation exposure to a minimum except:
(a) Time spent near the
radioactive source
b) Geometry of the container holding the source of radiation
(c) Distance from the source of radiation
d) Shielding of the
radioactive source
B
If the exposure rate at 4 m from a radioactive source is 5 mR/h,
what will the exposure rate be at 3 m?
(a) 2.8 mR/h
(b) 6.5 mR/h
(c) 7.4 mR/h
(d) 8.9 mR/h
D
A technologist has 500 mrem registered on his ring badge in 1 month. What should be done to decrease exposure in the future?
(a) Use lead pigs and syringe shields when preparing
radiopharmaceuticals
(b) Have another technologist elute the generator
(c) Wear lead aprons
(d) All of the above
A
Which of the following steps would not decrease a technologists chances of internal exposure to radiation?
(a) Wearing gloves during injection of
radiopharmaceuticals
(b) Using tongs to transfer a vial from a lead shield to a dose
calibrator
(c) Working under a fume hood when working with volatile liquids and radioactive gases
(d) Refraining from smoking and eating in the “hot lab”
B
Tools for measuring personal exposure to radiation include all of the following except:
(a) Thermoluminescent dosimeter
(b) Pocket ionization chamber
(c) Film badge
(d) Geiger-Mueller Counter
D
If the lead HVL for 99m Tc is 2.6
mm, and a lead shield containing 99m Tc elvate is 13 mm thick, what will the exposure rate be from the shielded vial if the unshielded
vial had a rate of 100 mR/h?
(a) 1.6 mR/h
(b) 3.1 mR/h
(c) 6.3 mR/h
(d) 12.5 mR/h
B
If a technologist sits 2 ft away from a generator and the dose rate at his chair is 15 mrem/h, what will the dose rate be if he moves his chair 4 ft from the
generator?
(a) 2.5 mrem/h
(b) 3.75 mrem/h
(c) 7.5 mrem/h
(d) 60 mrem/h
B
A three phase bone scan is often done to differentiate:
A) osteomyelitis vs. diskitis
B) osteoporosis vs. cellulitis
C) osteomyelitis vs. cellulitis
D) osteoporosis vs. septic arthritis
C
Which of the following is least likely to cause an artifact on a bone scan?
A) skin contaminated with urine
B) injection site
C) snap on trousers
D) colostomy bag
D
What could be the cause of generalized, diffuse activity in the abdomen on a bone scan?
A) free pertechnetate
B) pacemaker
C) bone cyst
D) malignant ascites
D
uniformly increased skeletal uptake of radiopharmaceutical with almost absent renal and bladder activity is usually referred to as a:
A) suprascan
B) flare phenomenon
C) superscan
D) renal failure
C
Which of the following describes a pediatric bone scan?
A) increased uptake along epiphyseal plates
B) decreased uptake along epiphyseal plates
C) overall decreased uptake in bone
D) increased uptake in long
A
Dipyridamole is supplied to a nuclear medicine department in 10 ml vials, each containing
50mg. If a patient weighs 155 pounds, how many milliliters must be injected for him to receive 0.56 mg/kg?
A) 17.4 ml
B) 8.7 ml
C) 7.9 ml
D) 39.5 ml
C
