Radiation Protection Final Exam with Verified
Solutions| Latest Update
which of the following factors can be used to minimize occupational radiation exposure
1. time
2. distance
3. shielding 1,2,3
if a radiographer stands 6 m from an x-ray tube and is subjected to an exposure rate of 4mGy/h,
what will the exposure rate be if the same radiographer moves to a position 12 m from the x-ray
tube 1 mGy/h
lead aprons are mainly designed to provide protection from what types of x-radiation
1. primary
2. leakage
3. scattered 2 and 3
true/false: patient exposure can be substantially reduced by using proper body and/or part
immobilization and motion reduction techniques true
true/false: an air gap technique removes scatter radiation by using decreased OID false
,true/false: with CR to DR, it is necessary to develop a policy whereby retaken image files can be
recovered for analysis as part of a repeat analysis program true
true/false: to protect the ovaries of a female patient, the shield should be placed approximately 1
inch medial to each palpable ASIS true
true/false: the age recommendation for screening mammography is controversial because
mammography is less accurate in the detection of breast cancer in younger women and likely to
result in many false-positive readings, leading to unnecessary biopsies in that population
true
true/false: the use of a lower peak kVp and a higher mAs reduces the patient dose false
true/false: shielding of particularly sensitive breast tissue during a scoliosis exam may be
accomplished using a clear lead shadow shield. The radiation dose to the breast of a young
patient may be further reduced by performing the scoliosis exam with the x-ray beam entering
the anterior surface of the patient's body instead of the posterior surface false
true/false: a radiographer's annual occupational EfD includes personal medical and natural
background radiation exposure false
true/false: a spot film device protective curtain protects the radiologist and radiographer at the
gonadal level false
,true/false: from the perspective of radiation safety, it is best to reverse the c-arm to place the x-
ray tube under the table and the image intensifier over the table true
true/false: in a typical x-ray suite, the most common primary radiation barrier is that behind the
wall bucky unit true
true/false: because scatter and leakage radiation emerge in all directions in the x-ray room, every
wall, door, viewing window, and other surface are always struck with some quantity of radiation
true
true/false: filtration primarily benefits the radiographer false
true/false: during a diagnostic x-ray procedure, the patient becomes a source of scattered
radiation as a consequence of the coherent scattering process false
true/false: methods and techniques that reduce patient exposure also reduce exposure for the
radiographer true
true/false: the amount of radiation a worker receives is inversely proportional to the length of
time the individual is exposed to ionizing radiation false
list four basic types of gonadal shielding that can be used during a diagnostic x-ray procedure
contact shields
shaped contact shields
, shadow shields
clear lead acrylic shields
to protect the patient's skin from exposure in fixed fluoroscopy procedures, the SSD should be no
less than ____ inches 15
in the electromagnetic spectrum, higher frequencies are associated with ____ (longer/shorter)
wavelengths and ___ (higher/lower) energies shorter, higher
Some consequences of ionization in human cells include:
1. creation of unstable atoms
2. production of free electrons
3. creation of reactive free radicals capable of producing substances poisonous to the cell
1, 2, and 3
which of the following statements concerning the 1979 nuclear reactor accident at TMI-2 is not
true
a. excess cancer deaths have been predicted to occur in the 2 million people living within 50
miles of the plant at the time of the accident
b. no melt-through of the reactor vessel occurred during the accident
c. excessive cancer deaths have not been predicted to occur in the 2 million people living within
50 miles of the plant at the time of the accident
d. the equivalent dose (EqD) received by 2 million people living in the vicinity of the nuclear
reactor at the time of the accident was 0.08 mSv a. excess cancer deaths have been
Solutions| Latest Update
which of the following factors can be used to minimize occupational radiation exposure
1. time
2. distance
3. shielding 1,2,3
if a radiographer stands 6 m from an x-ray tube and is subjected to an exposure rate of 4mGy/h,
what will the exposure rate be if the same radiographer moves to a position 12 m from the x-ray
tube 1 mGy/h
lead aprons are mainly designed to provide protection from what types of x-radiation
1. primary
2. leakage
3. scattered 2 and 3
true/false: patient exposure can be substantially reduced by using proper body and/or part
immobilization and motion reduction techniques true
true/false: an air gap technique removes scatter radiation by using decreased OID false
,true/false: with CR to DR, it is necessary to develop a policy whereby retaken image files can be
recovered for analysis as part of a repeat analysis program true
true/false: to protect the ovaries of a female patient, the shield should be placed approximately 1
inch medial to each palpable ASIS true
true/false: the age recommendation for screening mammography is controversial because
mammography is less accurate in the detection of breast cancer in younger women and likely to
result in many false-positive readings, leading to unnecessary biopsies in that population
true
true/false: the use of a lower peak kVp and a higher mAs reduces the patient dose false
true/false: shielding of particularly sensitive breast tissue during a scoliosis exam may be
accomplished using a clear lead shadow shield. The radiation dose to the breast of a young
patient may be further reduced by performing the scoliosis exam with the x-ray beam entering
the anterior surface of the patient's body instead of the posterior surface false
true/false: a radiographer's annual occupational EfD includes personal medical and natural
background radiation exposure false
true/false: a spot film device protective curtain protects the radiologist and radiographer at the
gonadal level false
,true/false: from the perspective of radiation safety, it is best to reverse the c-arm to place the x-
ray tube under the table and the image intensifier over the table true
true/false: in a typical x-ray suite, the most common primary radiation barrier is that behind the
wall bucky unit true
true/false: because scatter and leakage radiation emerge in all directions in the x-ray room, every
wall, door, viewing window, and other surface are always struck with some quantity of radiation
true
true/false: filtration primarily benefits the radiographer false
true/false: during a diagnostic x-ray procedure, the patient becomes a source of scattered
radiation as a consequence of the coherent scattering process false
true/false: methods and techniques that reduce patient exposure also reduce exposure for the
radiographer true
true/false: the amount of radiation a worker receives is inversely proportional to the length of
time the individual is exposed to ionizing radiation false
list four basic types of gonadal shielding that can be used during a diagnostic x-ray procedure
contact shields
shaped contact shields
, shadow shields
clear lead acrylic shields
to protect the patient's skin from exposure in fixed fluoroscopy procedures, the SSD should be no
less than ____ inches 15
in the electromagnetic spectrum, higher frequencies are associated with ____ (longer/shorter)
wavelengths and ___ (higher/lower) energies shorter, higher
Some consequences of ionization in human cells include:
1. creation of unstable atoms
2. production of free electrons
3. creation of reactive free radicals capable of producing substances poisonous to the cell
1, 2, and 3
which of the following statements concerning the 1979 nuclear reactor accident at TMI-2 is not
true
a. excess cancer deaths have been predicted to occur in the 2 million people living within 50
miles of the plant at the time of the accident
b. no melt-through of the reactor vessel occurred during the accident
c. excessive cancer deaths have not been predicted to occur in the 2 million people living within
50 miles of the plant at the time of the accident
d. the equivalent dose (EqD) received by 2 million people living in the vicinity of the nuclear
reactor at the time of the accident was 0.08 mSv a. excess cancer deaths have been
