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Rad Review Mock Exam D.
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Rad Review Mock Exam DThe design limits for a controlled area are based on the: - ✅B.) Annual recommended
dose limit for an occupational worker.
Pertaining to the radiation exposure contours for this fluoroscopic unit, which number
corresponds to the region receiving the highest exposure? - ✅B.) Number 2
The radiation exposure which is received by the operator of the equipment standing at
position number 1 is substantially reduced by the use of:
1.) A stationary radiographic grid
2.) A bucky slot cover
3.) A protective drape - ✅C.) 2 and 3
A radiographic image is obtained in the left PA oblique projection of the abdomen.
Which structure is likely to receive the highest entrance skin exposure? - ✅A.) The skin
on the posterior portion of the abdominal wall
Which of the following changes in the construction of the image receptor may result in
the reduction of the radiation exposure to the patient? - ✅B.) An increase in the size of
the crystals used in the intensifying screen
Because of an extremely low risk for permanent fetal injury, a therapeutic abortion
would only be considered in a fetus exposed to more than:
1.) 25,000 mrad
2.) 5,000 mrad
3.) 1,000 mrad - ✅A.) 1 only
Which of the normal tissues in the human body are most sensitive to the effects of an
equivalent of 200 rem irradiation? - ✅A.) The ovaries
During a digital fluoroscopic procedure, which action will result in the automatic
termination of the exposure? - ✅D.) More than a 5 mA technique is attempted
A radiographer receives an exposure of 120 mrem per week at a 50 cm source-to-skin
distance. In order to reduce this exposure to less than 30 mrem per week, this person
could move to a/an: - ✅D.) 105 cm source-to-skin distance
The ability of ionizing radiation to produce a biological response: - ✅A.) Decreases as
the quality factor of the radiation decreases
According to the current recommendations, which of the following individuals would
have the highest annual effective dose equivalent limit? - ✅D.) A pregnant occupational
worker
,During a digital radiographic procedure, a reduction in the scatter radiation intensity in
the patient is NOT associated with which of the following? - ✅C.) A reduction in the
amount of radiation the radiographer receives
The amount of radiation exposure that causes twice the expected incidence of a
disorder in a population is termed: - ✅A.) Doubling dose
Which set of exposure settings and technical factors is most likely to produce the lowest
entrance skin exposure to the patient?
A.) 200 mA, 20 ms, 93 kVp, 400 speed
B.) 800 mA, 20 ms, 95 kVp, 100 speed
C.) 400 mA, 20 ms, 89 kVp, 200 speed
D.) 400 mA, 100 ms, 83 kVp, 400 speed - ✅A.) 200 mA, 20 ms, 93 kVp, 400 speed
A developing human embryo is most sensitive to radiation-induced injuries during the
stage known as: - ✅D.) Organogenesis
A gonad shield with a .5 mm lead equivalent will attenuate approximately _____ of the
incident x-rays produced during an exposure of 75 kVp. - ✅C.) 88%
The principal reason why this radiographic image would have to be repeated is
because: - ✅D.) The radiographer failed to center the image receptor properly as to
include the entire region of interest.
Which of the following is NOT one of the areas normally associated with a higher than
usual occupational exposure rate? - ✅A.) Digital radiographic procedures
The American College of Radiology specifies a maximum entrance exposure measured
with a dosimeter should not exceed: - ✅D.) 1100 mR for an abdominal exposure
During which of the following examinations is a female patient most likely to receive the
highest genetically significant dose? - ✅B.) A Hysterosalpingogram
In a radioactive source has a half-life of 8 hours. How long would it take to reduce a 100
mcurie per hour source to a level of 12.5 mcurie per hour? - ✅D.) 24 hours
Which of the following is a common somatic effect that has been demonstrated in
individuals exposed to larger amounts of ionizing radiation?
1.) The development of cerebral palsy
2.) A lower sperm count
3.) The development of pyloric stenosis - ✅B.) 2 only
The majority of damage resulting from radiation exposure in the body is due to indirect
chemical changes that occur when _____ molecules are modified by their exposure to
radiation. - ✅C.) Water
, Which of the following amounts of shielding is likely to attenuate the greatest number of
high energy (100 keV) x-ray photons? - ✅C.) .5 mm of lead
A radiographer receives an exposure of 268 mroentgen per hour from a radioactive
source at a distance of 180 cm. What exposure would this person receive at a 360 cm
source-t0-skin distance? - ✅B.) 67 mroentgen per hour
The use which of the following devices should be employed to reduce the radiation
exposure to a radiographer during a mobile radiographic examination?
1.) The use of longer exposure cord
2.) The use of protective aprons
3.) The use of patient shielding devices - ✅A.) 1 and 2 only
The ingestion of radioisotopes of radium which is chemically similar to calcium, will most
likely result with the largest radiation exposure to the: - ✅B.) Skeletal system
When an optically stimulated luminescent monitoring is employed in a radiation
protection program, which of the following factors may provide erroneous readings? -
✅A.) Physical damage to the crystal
When employing a mobile radiographic unit, the minimum source-to-skin distance that
can be employed is: - ✅C.) 30 cm
Though the earth is struck by large amounts of cosmic radiation relatively little reaches
the earths surface because of the: - ✅D.) Filtering effects of the earths atmosphere
The typical estimated entrance exposure from a two-view radiographic examination of
the chest using a 400 speed imaging system is: - ✅B.) 20-30 mrem
A radiographic image of the pelvis for a male patient is requested. The use of the PA
projection is primarily recommended to: - ✅C.) Reduce the exposure to the prostate
gland
Acute radiation lethality appears to follow a: - ✅B.) Linear, threshold dose response
relationship
The damage which occurs in somatic tissues of the body after an exposure to sublethal
levels of radiation is considered to be: - ✅D.) Largely repairable through the
regeneration of the tissues.
A series of radiographic images are obtained of the lower gastrointestinal tract. Which of
the following projections is likely to result in the lowest exposure to the rectum? - ✅C.)
The AP axial projection
A radiation monitor badge report shows a permanent to-date value for an occupational
worker of 2.5 rem. This represents a dose equivalent of: - ✅A.) 2,500 mrem
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