Radiography: Radiobiology & Radiation Safety Ch 13

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Radiography: Radiobiology & Radiation Safety Ch 13
From book Radiography Essentials for Limited Practice 3rd Edition

  
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1.  The conventional (British system) radiation unit for measuring patient dose is the:
A.
B.
C.
D.
2.  What is the conventional (British system) radiation unit to express radiation intensity in air?
A.
B.
C.
D.
3.  The unit of the SI system used to measure the ionization of dry air nby an x-ray beam is:
A.
B.
C.
D.
4.  The unit commonly used to report occupational dose to radiation workers in the United States is:
A.
B.
C.
D.
5.  What is the conventional (British System) radiation unit of absorbed dose?
A.
B.
C.
D.
6.  How many rad are equivalent to one (1) Gy?
A.
B.
C.
D.
7.  A _________ is a number assigned to each type of radiation based on its relative biologic effect compared with x-rays.
A.
B.
C.
D.
8.  What is the "weighting factor" that is assigned to the equivalent dose (EqD)?
A.
B.
C.
D.
9.  In radiography, patient dose is usually calculated:
A.
B.
C.
D.
10.  Which of the following radiographic examinations typically delivers the greatest gonadal exposure?
A.
B.
C.
D.
11.  According to the Laws of Bergonie and Tribondeau, which of the following types of cells is most radiosensitive?
A.
B.
C.
D.
12.  Which of the following results from an indirect hit?
A.
B.
C.
D.
13.  Temporary molecules and parts of molecules that form because of radiation interacting with water and are toxic to human tissue are called:
A.
B.
C.
D.
14.  Which of the following cells would not be as vulnerable to x-rays?
A.
B.
C.
D.
15.  What is a direct hit?
A.
B.
C.
D.
16.  Which of the following types of radiation effect is typical of the risk to a patient undergoing a diagnostic x-ray examination?
A.
B.
C.
D.
17.  Which of the following is a stochastic radiation effect?
A.
B.
C.
D.
18.  Which of the following occur with high radiation doses?
  1. stochastic effects
  2. short-term somatic effects
  3. nonstochastic effects
A.
B.
C.
D.
19.  What is erythema?
A.
B.
C.
D.
20.  What is the guiding philosophy of radiation protection?
A.
B.
C.
D.
21.  Which of the following statements reflects current scientific opinion regarding the effects of diagnostic levels of ionizing radiation?
A.
B.
C.
D.
22.  The EDE limit for whole-body dose of occupational radiation exposure for nonpregnant workers older thatn age 18 who are involved in radiation use is:
A.
B.
C.
D.
23.  Which of the following are considered "low-dose techniques"?
  1. using optimum kVp
  2. using fast screens and fast film
  3. Using a minimum SID of 40 inches
A.
B.
C.
D.
24.  Which of the following changes decrease patient dose?
  1. using faster screens
  2. increasing the kVp using the 15% rule
  3. increasing the grid ratio to a 16:1 ratio
A.
B.
C.
D.
25.  When radiation exposure occurs during pregnancy, the greatest risk of birth defects occurs when the exposure:
  1. to the uterus exceeds r rad
  2. occures within the first trimester of pregnancy
  3. occurs within the third trimester of pregnancy
A.
B.
C.
D.
26.  One of the earliste changes seen in the body as a result of exposure to radiation is blood changes.  At what radiation dose is this seen?
A.
B.
C.
D.
27.  Death occurs if the body recieves a whole-body exposure of how much radiation?
A.
B.
C.
D.
28.  Which radiographic examination gives the fetus the highest "fetal dose"?
A.
B.
C.
D.
29.  Which of the following are nonstochastic radiation effects?
  1. sauzyres followed by coma
  2. erythema
  3. radiation sickness
A.
B.
C.
D.
30.  The reduction of a limited operator's exposure to ionizing radiation can be accomplished by:
  1. decreasing the time in the radiation field
  2. increasing the distance from the radiation field
  3. using low kVp exposure techniques
A.
B.
C.
D.
31.  Which of the following are considered low-dose techniques?
  1. increasing kVp, decreasing mAs
  2. Using slow intensifying screens
  3. Using a minumum source-image distance of 40 inches
A.
B.
C.
D.
32.  Which of the following changes will decrease patient dose?
A.
B.
C.
D.
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