RAD 140| Ace Your Exams:162 Comprehensive Questions 100% Correct Answers
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Course
RAD 140
Institution
RAD 140
A study of an irradiated population which showed a relative risk factor below 1.0 would indicate that the population had a _____ risk. - ️️reduced
A subject would not experience _____ following a dose high enough to cause CNS syndrome. - ️️hematologic syndrome
gastrointestinal syndrome
A...
RAD 140| Ace Your Exams:162
Comprehensive Questions
A study of an irradiated population which showed a relative risk factor below 1.0 would indicate that the
population had a _____ risk. - ✔ ✔ reduced
A subject would not experience _____ following a dose high enough to cause CNS syndrome. - ✔ ✔
hematologic syndrome
gastrointestinal syndrome
A target molecule that is _____ will always cause cell death. - ✔ ✔ inactivated
A tenth-value layer is equal to _____ half-value layers. - ✔ ✔ 3.3
What is the minimum requirement for filtration on x-ray equipment operating above 70 kVp? - ✔ ✔
2.5 mm Al equivalent
What is the NCRP? - ✔ ✔ National Council of Radiation Protection
What would be the most likely immediate response to a whole body dose of 2 Gy? - ✔ ✔ diarrhea,
nausea, and vomiting
When an atom of water is irradiated it first dissociates into _____. - ✔ ✔ an ion pair
When using the inverse square law during fluoroscopy, the patient should be considered a(n) _____
source of radiation. - ✔ ✔ point
Which exam does not have one of the highest repeat rates? - ✔ ✔ chest x-ray
Which of the following types of radioactive particle has the highest LET? - ✔ ✔ alpha particle
A type of DNA damage that may not be reversible is a _____. - ✔ ✔ base change or loss
About half of the population will experience skin erythema following a localized dose of _____ Gy. - ✔
✔ 5
According to target theory, the target molecule of a cell is _____. - ✔ ✔ the DNA in the nucleus
Acute skin effects from radiation exposure have been reported following _____ exams. - ✔ ✔
angiointerventional
An epidemiological study of the stochastic effects of very low doses of radiation requires a population of
_____ of people. - ✔ ✔ millions
, An estimation of patient dose is reported as _____. - ✔ ✔ ESE, Bone marrow dose, gonadal dose
An indirect effect from ionizing radiation occurs on a _____ molecule. - ✔ ✔ water
Ankylosing spondylitis patients treated with radiation showed an increased incidence of _____. - ✔ ✔
leukemia
At the level of the tabletop, the intensity of the fluoroscopic beam should not exceed _____ for each mA
of operation at 80 kVp. - ✔ ✔ 21 mGy/min
Bone marrow dose is measured _____. - ✔ ✔ as an estimate from ESE
The LD50/60 for humans is approximately _____ Gy. - ✔ ✔ 3.5
The LD50/60 is the dose of radiation to the whole-body that will result in death within _____ to _____%
of the irradiated population. - ✔ ✔ 60 days, 50
The leakage radiation limit for x-ray tubes is less than _____ mGy/hr at 1 meter from the tube housing. -
✔ ✔ 1
The lens of the eye should never receive more than _____ per year. - ✔ ✔ 150 mSv (15 rem)
The lethal effects of cell irradiation are measured by cell _____. - ✔ ✔ survival
The lowest occupational exposure of diagnostic x-ray personnel occurs during _____. - ✔ ✔ CT &
Mammography
Breast dose from a scoliosis exam can be reduced by using the _____. - ✔ ✔ PA projection and
shielding
Chronic low doses of radiation have _____ effect on fertility. - ✔ ✔ no
CT is considered a low-dose procedure. - ✔ ✔ False
Data showing radiation-induced human genetic abnormalities _____. - ✔ ✔ does not exist
Death from acute radiation exposure follows a _____ dose-response relationship. - ✔ ✔ nonlinear,
threshold
Devices designed to measure total accumulated radiation intensity are called _____. - ✔ ✔
dosimeters
Digital mammography results in lower doses than screen/film mammography. - ✔ ✔ True
DNA is contained in the _____ of the cell nucleus. - ✔ ✔ chromosomes
Dose limits are based on a _____ dose-response relationship to radiation. - ✔ ✔ linear, nonthreshold
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