Module 4A Quiz

Question 1

The amount of time during the week that the tube is actually producing radiation is called the:

a.) work factor
b.) use factor
c.) time factor
d.) occupancy factor

Answer 1

a.) work factor

Question 2

A protective curtain, or sliding panel, with a minimum of 0.25mm lead equivalent, should normally be positioned between the fluoroscopist and the patient to intercept which of the following types of radiation?

a.) primary radiation
b.) direct radiation
c.) exit or image formation radiation
d.) scattered radiation above the tabletop

Answer 2

d.) scattered radiation above the tabletop

Question 3

The exposure cord for the control booth must be:

a.) at least 4 ft in length
b.) at least 2 ft in length
c.) at least 6 ft in length
d.) attached to the control console

Answer 3

d.) attached to the control console

Question 4

The best place for the fetal monitor to be worn is:

a.) at chest level
b.) at waist level over the apron
c.) at waist level under the apron
d.) at collar level

Answer 4

c.) at waist level under the apron

Question 5

Choose all that apply:
A compensating filter:

a.) consists of a wedge or trough filter
b.) attenuates xrays that strike the thinner area of the body part
c.) permits more xrays to strike the denser area of the body part
d.) increases patient dose

Answer 5

a.) consists of a wedge or trough filter
b.) attenuates xrays that strike the thinner area of the body part
c.) permits more xrays to strike the denser area of the body part

Question 6

Fetal dose limits should not exceed: (choose all that apply)

a.) 5 mSv/month
b.) 50 mSv for the entire 9 months
c.) 5 mSv for the entire 9 months
d.) .5 mSv/month

Answer 6

c.) 5 mSv for the entire 9 months
d.) .5 mSv/month

Question 7

As a student, your annual dose limit is 1 mSv.

a.) true
b.) false

Answer 7

a.) true

Question 8

The NCRP reccommends a minimum total filtration of ____________ for xray equippment operating above 70 kvp.

a.) 2.0 mm Al/Eq
b.) 1.0 mm Al/Eq
c.) 2.5 mm Al/Eq
d.) 1.0 mm Pb/Eq

Answer 8

c.) 2.5 mm Al/Eq

Question 9

A primary barrier should be ____________ in length from the floor upwards.

a.) 10 feet
b.) 12 feet
c.) 5 feet
d.) 7 feet

Answer 9

d.) 7 feet

Question 10

As the speed of the image receptor increases, patient dose __________.

a.) increases
b.) decreases
c.) increases according the inverse square law
d.) remains the same

Answer 10

b.) decreases

Question 11

Which of the following dosimeters contain a crystalline form of lithium fluoride:

a.) thermoluminescent dosimeter
b.) film badge
c.) optically stimulated luminescence

Answer 11

a.) thermoluminescent dosimeter

Question 12

A bucky slot cover protects:

a.) the patients gonadal level
b.) the technologists or radiologists gonadal level
c.) the patients abdominal level
d.) the technologists or radiologists thyroid level

Answer 12

b.) the technologists or radiologists gonadal level

Question 13

The optically stimulated luminescense (OSL) dosimeter is “read out” by using:

a.) a densiometer
b.) an ionization chamber
c.) a thermoluminescent analyzer
d.) laser light at selected frequencies

Answer 13

d.) laser light at selected frequencies

Question 14

Which of the following personell dosimeters resembles an ordinary fountain pen externally?

a.) film badge dosimeter
b.) optically stimulated luminescence dosimeter
c.) pocket ionization chamber
d.) thermoluminescent dosimeter

Answer 14

c.) pocket ionization chamber

Question 15

For primary radiation, what is the term that represents a portion of beam on time that the xray beam is directed at a primary barrier during the week?

a.) occupancy factor
b.) workload factor
c.) distance factor
d.) use factor

Answer 15

d.) use factor

Question 16

Personnel dosimeters protect the worker from ionizing radiation.

a.) true
b.) false

Answer 16

b.) false

Question 17

The annual effective dose limit for individual members of the general population not occupationally exposed is ___________ for continuous or frequent exposures from artificial sources other than medical irradiation and natural background and ___________ for infrequent annual exposure.

a.) 50 mSv, 25 mSv
b.) 1 mSv, 5 mSv
c.) 5mSv, 9 mSv
d.) 3 mSv, 7 mSv

Answer 17

b.) 1 mSv, 5 mSv

Question 18

What type of collimator will automatically restrict the xray beam to the size of the image cassette or image receptor?

a.) positive beam limitation
b.) electronic focused beam
c.) diaphragm
d.) manual collimator

Answer 18

a.) positive beam limitation

Question 19

Determine the cummalative effective dose limit to the whole body of an occupationally exposed person who is 46 years old

a.) 460 mSv
b.) 4.6 mSv
c.) 46 mSv
d.) 4600 mSv

Answer 19

a.) 460 mSv

Question 20

A fluoroscope must be equipped with a cumalative timing device which times the radiation exposure an audible alarm after the fluoroscope has been energized for:

a.) 3 mins
b.) 5 mins
c.) 2 mins
d.) 1 mins

Answer 20

b.) 5 mins

Question 21

A secondary barrier should contain how much lead thickness?

a.) .5mm
b.) 1/32 in
c.) 11 mm
d.) 1/16 in

Answer 21

b.) 1/32 in

Question 22

Which of the following is a disadvantage of the optically stimulated dosimeter?

a.) exposure not determinable on the day of occurence
b.) no permanent, legal record of exposure
c.) mechanical shock can cause false high reading
d.) not cost effective for large numbers of personnel

Answer 22

a.) exposure not determinable on the day of occurence

Question 23

What is the purpose of radiographic beam filtration?

a.) to reduce exposure to the patients skin and superficial tissues by absorbing most of the higher energy photons from the heterogenous beam
b.) to reduce exposure to the patients skin and superficial tissues by absorbing all of the higher energy photons from the homogenous beam
c.) to reduce exposure to the patients skin and superficial tissues by absorbing most of the lower energy photons from the heterogenous beam
d.) to reduce exposure to the patients skin and superficial tissues by removing all the lower enegy photons from the homogenous beam

Answer 23

c.) to reduce exposure to the patients skin and superficial tissues by absorbing most of the lower energy phototons from the heterogenous beam

Question 24

Beam filtration devices:

a.) confine the primary beam before it hits the patient
b.) continues the remnant beam before it hits the IR
c.) filters out low energy photons
d.) is added and inherent filtration

Answer 24

a.) confine the primary beam before it hits the patient

Question 25

The primary barrier in an xray room is:

a.) protects from leakage and scatter radiation
b.) lead thickness should be 1/32 in thick
c.) never struck by the primary beam
d.) any barrier that is stuck by the primary beam

Answer 25

d.) any barrier that is stuck by the primary beam

Question 26

Secondary radiation includes:
1.) leakage radiation
2.) primary radiation
3.) scatter radiation

a.) 1 and 2 only
b.) 1, 2 and 3
c.) 2 and 3 only
d.) 1 and 3 only

Answer 26

d.) 1 and 3 only

Question 27

Because of the OSL dosimeters sensitivity down to as low as 10 Sv for xray and gamma ray photons in the energy range 5 kev to 40 mev, it is an excellent and practical monitoring device for:

a.) members of the general public not occupationally employed
b.) pregnant employees working in high radiation enviroments
c.) employees working in low radiaiton enviroments and for pregnant workers
d.) employees working in high radiation enviroments and for non pregant workers

Answer 27

c.) employees working in low radiation enviroments and for pregnant workers

Question 28

The use of a grid in a radiographic procedure will result in ____________.

a.) no change to the patient dose
b.) a decrease in patient dose
c.) an increase in patient dose
d.) more scatter radiation

Answer 28

c.) an increase in patient dose

Question 29

Sheilding requirements for a barrier can be modified depending on how often the room on the other side of the wall is used and by whom.

a.) true
b.) false

Answer 29

a.) true

Question 30

The exposure switch (foot pedal) should:

a.) make the image brighter the harder the foot pedal is pressed
b.) cut off the exposure when the 5 minute timer alarms
c.) a dead man type switch
d.) have a cord that is 6 foot long

Answer 30

c.) a dead man type switch

Question 31

Fluoro units in a cath lab and special procedures suites are allowed to have the exposure timer set longer than most fluoro units. This is called:

a.) half level control
b.) high level control
c.) half value exposure
d.) half value layer

Answer 31

b.) high level control

Question 32

A dosimeter containing filters composed of aluminum, tin and copper, and thin strips of aluminum oxide, which when stimulated by a laser light becomes luminescent to the amount of radiation recieved is the:

a.) film badge
b.) optically stimulated luminescent dosimeter (OSL)
c.) pen dosimeter
d.) thermoluminescent dosimeter (TLD)

Answer 32

b.) optically stimulated luminescent dosimeter (OSL)