FALL 16 - RADT 101 - WEEK 11 - EXPOSURE
TECHNIQUE SELECTION QUESTIONS WITH
ACCURATE ANSWERS
A high kVp results in:
a. less absorption and more transmission in anatomic tissues.
b. less variation in the x-ray intensities exiting the patient.
c. increase interactions from Compton scattering.
d. low-contrast image.
e. all of the above. correct answer e. all of the above.
AEC eliminates the need for the radiographer to select the actual
_____ the examination will require.
a. SID
b. exposure time
c. kVp
d. focal spot size correct answer b. exposure time
As mAs increases, the quantity of radiation reaching the IR
____________________.
a. decreases
b. increases
c. is not affected correct answer b. increases
Generally speaking, patient dose will be decreased with the:
a. variable kVp-variable mAs technique chart design.
b. fixed kVp-fixed mAs technique chart design.
c. variable kVp-fixed mAs technique chart design.
d. fixed kVp-variable mAs technique chart design. correct answer
d. fixed kVp-variable mAs technique chart design.
If a part measures 14 cm and requires the use of 75 kVp, how
much kVp would a part measuring 18 cm require when using a
variable kVp-fixed mAs technique chart?
a. 83 kVp
b. 77 kVp
c. 67 kVp
d. 91 kVp correct answer a. 83 kVp
, If the backup time/mAs is automatically set by the x-ray unit, the
exposure should end when a maximum of _________ has been
reached.
a. 600 mAs
b. 600 mA
c. 600 s
d. 600 kVp correct answer a. 600 mAs
If the detector is directly exposed to the primary beam during a
film-screen study, the area of interest will appear:
a. underexposed.
b. correctly exposed.
c. to have high contrast.
d. overexposed. correct answer a. underexposed.
If you were to select 250 mA and 0.5 s on the control panel, how
much mAs would be created?
a. 62.5 mAs
b. 500 mAs
c. 250 mAs
d. 125 mAs correct answer d. 125 mAs
In order to become familiar with manual technical factors (i.e.,
setting mAs and kVp and not using AEC), it is very helpful to pay
attention to the:
a. exposure time.
b. density control.
c. mAs readout.
d. heat units. correct answer c. mAs readout.
In order to reduce patient exposure, _____ kVp and _____ mAs
should be used when possible.
a. It makes no difference.
b. higher, higher
c. higher, lower
d. lower, higher correct answer c. higher, lower
Increasing the kVp will _________ the IR exposure and density
TECHNIQUE SELECTION QUESTIONS WITH
ACCURATE ANSWERS
A high kVp results in:
a. less absorption and more transmission in anatomic tissues.
b. less variation in the x-ray intensities exiting the patient.
c. increase interactions from Compton scattering.
d. low-contrast image.
e. all of the above. correct answer e. all of the above.
AEC eliminates the need for the radiographer to select the actual
_____ the examination will require.
a. SID
b. exposure time
c. kVp
d. focal spot size correct answer b. exposure time
As mAs increases, the quantity of radiation reaching the IR
____________________.
a. decreases
b. increases
c. is not affected correct answer b. increases
Generally speaking, patient dose will be decreased with the:
a. variable kVp-variable mAs technique chart design.
b. fixed kVp-fixed mAs technique chart design.
c. variable kVp-fixed mAs technique chart design.
d. fixed kVp-variable mAs technique chart design. correct answer
d. fixed kVp-variable mAs technique chart design.
If a part measures 14 cm and requires the use of 75 kVp, how
much kVp would a part measuring 18 cm require when using a
variable kVp-fixed mAs technique chart?
a. 83 kVp
b. 77 kVp
c. 67 kVp
d. 91 kVp correct answer a. 83 kVp
, If the backup time/mAs is automatically set by the x-ray unit, the
exposure should end when a maximum of _________ has been
reached.
a. 600 mAs
b. 600 mA
c. 600 s
d. 600 kVp correct answer a. 600 mAs
If the detector is directly exposed to the primary beam during a
film-screen study, the area of interest will appear:
a. underexposed.
b. correctly exposed.
c. to have high contrast.
d. overexposed. correct answer a. underexposed.
If you were to select 250 mA and 0.5 s on the control panel, how
much mAs would be created?
a. 62.5 mAs
b. 500 mAs
c. 250 mAs
d. 125 mAs correct answer d. 125 mAs
In order to become familiar with manual technical factors (i.e.,
setting mAs and kVp and not using AEC), it is very helpful to pay
attention to the:
a. exposure time.
b. density control.
c. mAs readout.
d. heat units. correct answer c. mAs readout.
In order to reduce patient exposure, _____ kVp and _____ mAs
should be used when possible.
a. It makes no difference.
b. higher, higher
c. higher, lower
d. lower, higher correct answer c. higher, lower
Increasing the kVp will _________ the IR exposure and density
