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ASRT Rad Pro

Radiation protection quiz for CA Fluor quiz 2016

QuestionAnswer
Only pregnant patients undergoing radiologic examinations that could produce doses greater than ___mGy (___mrad) to the fetus are considered to be at any risk from radiation exposure : a. 1 (100),b. 2 (200), c. 3 (300) ,d. 4(400 2 (200)
The rapidly dividing cells of an embryo or fetus are highly sensative to radiation, particulary in the first ___ weeks of pregnancy : a. 20 b. 22 c. 24 d. 26 a. 20
In Fluoro, high kVp and low mA technical factors are preffered techniques to lower patient and radiology staff dose. The 15% rule states that increasing the kVp by 15% decreases the mAs by ___ % : a. 25 b. 33 c. 50 d. 66 c. 50
a KUB examination delivers a fetal dose of about 2mGy. The fetal life expectancy lost as a result of examination is ___ hours : a. 7 b. 14. c. 28. d. 25 b. 14
Gray describes the radiation dose absorbed by the tissues following exposure to ionizing radiation. Radiation absorbed dose (rad) is the conventional term for this unit of measure. One Gy is equal to __ rad: a. 100 b. 10 c. 1 d. .1 a. 100
Which unit of measure is the SI unit term for dose equivalent : a. Bq b. Sv c. R d. Ci b Sv
Which agency is responsible for monitoring the workplace environment, including requirements concerning occupational exposure to radiation : a. FDA b. CDRH c. NRC d. OSHA d. OSHA
According to NCRP Report no 116, the annual effective dose limit for occupationally exposed individuals is _ mSv (_ rem) : a.50 (5) b.70 (7) c. 150 (15) d. 200 (20) a. 50 (5)
Which of the following Fluoroscopic techniques are consistent with ALARA according to NCPR no. 107 1. using the magnification mode 2. using the last image-hold feature 3. using intermittent fluoroscopy a 1 and 2 b. 1 and 3 c. 1,2, and 3 b. 2 and 3
How long will it take for a patient undergoing a Barium Enema to receive an equivalent effective dose from natural background radiation : a. 3.2 years b. 2.7 years c. 243 days d. 182 days b 2.7 years
What is the legal definition of standard of care : A. Morally correct actions that benifit the greatest number of people b. A breach of duty owed to a patient that results in some type of damage or injury c. The intention of the professional to NEXT CARD D. the degree of care and skill used by a reasonable professional practicing in the same or similar circumstances
definition of standard of care (CONT)c. The intention of the professional to to deliver care that obtains good results or is beneficial d. The degree of care and skill used by a reasonable professional practicing in the same or similar circumstances D. the degree of care and skill used by a reasonable professional practicing in the same or similar circumstances
What is the most commonly used shielding used in X Ray rooms a. brick c. wood c. concrete d. lead d. lead
what is half-value layer : a. the number of coatings used in optically clear lead glass b. the length of a wraparound lead apron c. a term that describes the efficiency of a radiation-absorbing material d. a measurement of the source-to-table top distance c. a term that describes the efficiency of a radiation-absorbing material
Workload is a measure of the radiation output expressed in mA-min per week. Which of the following factors are used to calculate the workload of a particular unit. 1. occupancy 2. patients per day 3. mAs range a. 1 and 2 b. 1 and 3 c. 2 and 3 d. 1,2,3 c. 2 and 3
In addition to reducing patient dose, what is another benefit of collimators a. larger field sizes b. decreased image noise from scatter radiation c. faster imaging times d. the need for less room shielding b. decreased image noise from scatter radiation
Tube current mA controls the quantity of the x-rays produced per unit of time. If the Ma is doubled, then the dose to the patient and staff is _ a. tripled b. reduced by one-tenth c. reduced by one-half d. doubled d. doubled
How often should environmental inspections of fluoroscopy units be performed a. once a month b. every 3 months c. every 6 months d. once a year c 6 months
Which of the following is the most commonly used beam-limiting device? a. collimator b. interlock c. grid d. filter a. collimator
Which of the following radiation protection methods limits unneccassary exposure by reducing the number of photons in the x-ray beam a. screening b. shielding c. filtration d. seperation b. shielding
Which type of shielding is suspended over the patient a. contact b. shadow c. hover d. silhouette b. shadow
Although lead aprons do not prevent all x-rays from reaching the wearer, they reduce radiation exposure by _% a. 80 b. 75 c. 50 d. 45 a.80
Which of the following position methods may reduce patient radiation dose 1. gonads away from primary beam 2.place the patient on the table, slightly off center 3. place radiosensitive organs so they receive exit dose A. 1 &2 b. 1 & 3 c. 2 & 3 d. 1,2,3 b. 1 & 3
During the fluoroscopy the tableside operator receives the highest occupational dose with the highest levels directed at the waist a true b. False a True
The joint commission requires a medical physicist to estab. pt doses for commonly performed examinations by each radiographic unit. The dose delivered during fluoroscopy should be limited to _ Gy ( _ rad) a. 1.5 (150) b. 1 (100) c. .5 (.50) d. .1 (10) d. .1 (10)
which law states that the resistance or sensitivity to radiation depends on the metabolic state of cell, tissue or organ a. direct square b. inverse square c. Curie and Bacquerel d. Burgonie and tribondeau D Bergonie and tribondeau
Only pregnant patients undergoing radiologic examinations that could produce doses greater than _ mGy (_mrad) to the fetus are considered to be at any risk from radiation exposure a. 1(100) b. 2(200) c. 3(300) d. 4 (400) b 2 (200)
Which of the following strategies are recommended by the ICRP to reduce patient dose? 1. define rigorous referral criteria 2. regularly assessing repeat rates 3. choosing projections to minimize dose a. 1 & 2 b. 1 & 3 c. 2 & 3 d. 1,2,3 c. 1,2,3
Which of the following sources is the largest contributor of exposure to natural ionizing radiation a. earth's crust b. radon and decaying products c. nuclear medicine studies d. outer space b. radon and its decay productts
X- rays are subject to the inverse square law. What implication does the law have for radiation protection a. the penetrating power of the x ray beam is directly proportional to the time of exposure NEXT CARD b. the amount of radiation a person receives depends on the distance he or she is from the source
What implication does the law have for radiation protection CONTb. the amount of radiation a person receives depends on the distance he or she is from the source c. thickness of shielding material must be one-tenth the value os its absorbing capacity b. the amount of radiation a person receives depends on the distance he or she is from the source
X- rays are subject to the inverse square law. What implication does the law have for radiation protection CONT d. the amount os scatter radiation is inversely related to the incident angle of the x-ray tube b. the amount of radiation a person receives depends on the distance he or she is from the source
Which of the following is NOT one of the three fundamental principles of radiation protection a. time b. shielding c. 15% d. distance c 15%
which of the following fluoroscopy techniques are consistent with ALARA in lowering radiation dose to patients 1. using magnification 2. using last hold 3. using intermittent a 1&2 b. 1 & 3 c. 2&3 d. 1,2,3 c 2 & 3