RAD 112 MIDTERM REVIEW QUESTIONS
In the diagnostic range, most x-rays are ______________.
a. low energy
b. visible
c. characteristic
d. brems - Answers :d. brems
What is the most common material added to an x-ray system for filtration?
a. plastic
b. tungsten
c. wood
d. aluminium - Answers :d. aluminium
Which combination of technical factors results in a lower patient dose?
a. low kV, low mAs
b. high kV, low mAs
c. low kV, high mAs
d. high kV, high mAs - Answers :b. high kV, low mAs
With regards to an emission spectrum chart, increasing the mA or time will have what
effect?
a. increase amplitude
b. decrease amplitude
c. shift to the right
d. increase in amplitude AND a shift to the right - Answers :a. increase amplitude
If a technologist receives 3 mR of exposure at a distance of 3 meters from the patient,
how much exposure will he/she receive at a new distance of 5 meters?
a. 4.1
b. 1.8 mR
c. 1.1 mR
d. 2.2 mR - Answers :c. 1.1 mR
When the average energy of an x-ray beam increases, the beam is said to have been
___________________.
a. weakend
b. softened
c. attenuated
d. hardened - Answers :d. hardened
,An exposure was taken with the following factors and yielding satisfactory density;
80kV, 200mA, 0.7 seconds, 60" SID. A repeat image will be taken from a new distance
of 72". What change will be necessary to maintain the density recorded on the first
image?
a. decrease kV to 68
b. increase mAs to 202
c. increase kV to 82
decrease mAs to 98 - Answers :c. increase kV to 82
The HVL for a particular exposure is 3 cm of soft tissue and the body part being imaged
is 6 cm thick. If there were 120,000 x-rays striking the patient, how many will be exiting
the patient to create an image by interacting with the IR?
a. 60,000
b. 30,000
c. 15,000
d. 7.500 - Answers :b. 30,000
High contrast images are always preferred over low contrast images.
a. true
b. false - Answers :b. false
What material/s represent added filtration; A.) Mirror Backing, B.) Sheet of aluminum,
C.) Glass window of tube enclosure?
a. B only
b. C only
c. A only
d. A & B
e. A & C - Answers :d. A & B
Which technical factor controls the penetrability of the beam?
a. time
b. SID
c. mA
d. kVp - Answers :d. kVp
With regards to an emission spectrum chart, increasing the kVp will have what effect;
A.) Shift to the right, B.) Increase the Amplitude, C.) Shift to the left, D.) Decrease the
Amplitude?
a. A & B
, b. C & D
c. D only
d. B only - Answers :a. A & B
Any material can constitute a HVL given the appropriate thickness of said material is
used.
a. true
b. false - Answers :a. true
HVL is dependent on which technical factor selected by the technologist?
a. kVp
b. distance
c. mA
d. time - Answers :a. kVp
When using a compensating filter, which part of the body with the thick portion of the
filter be aligned with?
a. thinner portion
b. curved portion
c. thicker portion
d. flat portion - Answers :a. thinner portion
An exposure is made using 92 kVp and 12 mAs at a distance of 40" and results in ideal
optical density. The radiologist requires a repeat image be taken to increase contrast. In
order to do this, you change the kVp to 78. What other correction must be made to
provide the same density as the first image?
a. 24 mAs
b. 6 mAs
c. 72" SID
d. 48" SID - Answers :a. 24 mAs
If you were to double your kVp what would happen to your quantity of x-rays?
a. decrease by a factor of 4
b. double
c. increase by a factor of 4
d. decrease by half - Answers :c. increase by a factor of 4
An increase in filtration will ____________________ the amount of x-rays hitting the
image receptor.
a. have no effect on
In the diagnostic range, most x-rays are ______________.
a. low energy
b. visible
c. characteristic
d. brems - Answers :d. brems
What is the most common material added to an x-ray system for filtration?
a. plastic
b. tungsten
c. wood
d. aluminium - Answers :d. aluminium
Which combination of technical factors results in a lower patient dose?
a. low kV, low mAs
b. high kV, low mAs
c. low kV, high mAs
d. high kV, high mAs - Answers :b. high kV, low mAs
With regards to an emission spectrum chart, increasing the mA or time will have what
effect?
a. increase amplitude
b. decrease amplitude
c. shift to the right
d. increase in amplitude AND a shift to the right - Answers :a. increase amplitude
If a technologist receives 3 mR of exposure at a distance of 3 meters from the patient,
how much exposure will he/she receive at a new distance of 5 meters?
a. 4.1
b. 1.8 mR
c. 1.1 mR
d. 2.2 mR - Answers :c. 1.1 mR
When the average energy of an x-ray beam increases, the beam is said to have been
___________________.
a. weakend
b. softened
c. attenuated
d. hardened - Answers :d. hardened
,An exposure was taken with the following factors and yielding satisfactory density;
80kV, 200mA, 0.7 seconds, 60" SID. A repeat image will be taken from a new distance
of 72". What change will be necessary to maintain the density recorded on the first
image?
a. decrease kV to 68
b. increase mAs to 202
c. increase kV to 82
decrease mAs to 98 - Answers :c. increase kV to 82
The HVL for a particular exposure is 3 cm of soft tissue and the body part being imaged
is 6 cm thick. If there were 120,000 x-rays striking the patient, how many will be exiting
the patient to create an image by interacting with the IR?
a. 60,000
b. 30,000
c. 15,000
d. 7.500 - Answers :b. 30,000
High contrast images are always preferred over low contrast images.
a. true
b. false - Answers :b. false
What material/s represent added filtration; A.) Mirror Backing, B.) Sheet of aluminum,
C.) Glass window of tube enclosure?
a. B only
b. C only
c. A only
d. A & B
e. A & C - Answers :d. A & B
Which technical factor controls the penetrability of the beam?
a. time
b. SID
c. mA
d. kVp - Answers :d. kVp
With regards to an emission spectrum chart, increasing the kVp will have what effect;
A.) Shift to the right, B.) Increase the Amplitude, C.) Shift to the left, D.) Decrease the
Amplitude?
a. A & B
, b. C & D
c. D only
d. B only - Answers :a. A & B
Any material can constitute a HVL given the appropriate thickness of said material is
used.
a. true
b. false - Answers :a. true
HVL is dependent on which technical factor selected by the technologist?
a. kVp
b. distance
c. mA
d. time - Answers :a. kVp
When using a compensating filter, which part of the body with the thick portion of the
filter be aligned with?
a. thinner portion
b. curved portion
c. thicker portion
d. flat portion - Answers :a. thinner portion
An exposure is made using 92 kVp and 12 mAs at a distance of 40" and results in ideal
optical density. The radiologist requires a repeat image be taken to increase contrast. In
order to do this, you change the kVp to 78. What other correction must be made to
provide the same density as the first image?
a. 24 mAs
b. 6 mAs
c. 72" SID
d. 48" SID - Answers :a. 24 mAs
If you were to double your kVp what would happen to your quantity of x-rays?
a. decrease by a factor of 4
b. double
c. increase by a factor of 4
d. decrease by half - Answers :c. increase by a factor of 4
An increase in filtration will ____________________ the amount of x-rays hitting the
image receptor.
a. have no effect on
