Question 1

Technique charts are still needed when using AEC.

Accepted Answer

A) True 
 B)False  True

Question 2

The technique chart will provide information as to how to recognize and compensate for additive pathology.

Accepted Answer

A) True 
 B)False  False

Question 3

A variable kVp-fixed mAs chart may be most effective with:

Accepted Answer

A)   geriatric patients.
B)   trauma patients.
C)   patients imaged with mobile equipment.
D)   pediatric patients. D

Question 4

Newer x-ray units may keep you from making an exposure if you've selected the table Bucky on the control panel but there's no IR in the table Bucky.

Accepted Answer

A) True 
 B)False

Question 5

With a CR system,when using AEC to image a patient who is having difficulty holding still,increasing the mA (if the unit allows)will:

Accepted Answer

A)   be a bad idea because the patient will be overexposed.
B)   be a bad idea because the patient will be underexposed.
C)   be a good idea because the exposure time will increase.
D)   be a good idea because the exposure time will decrease.

Question 6

The most common cause for repeating images done with film-screen and AEC is inaccurate:

Accepted Answer

A)   kVp selection.
B)   backup mAs selection.
C)   centering.
D)   alignment of the tube and image receptor.

Question 7

What is the appropriate change in kVp when using a variable kVp-fixed mAs technique chart for a 1 cm change in tissue thickness?

Accepted Answer

A)   2 kVp
B)   4 kVp
C)   6 kVp
D)   10 kVp

Question 8

When doing a tabletop forearm study with CR,you should:

Accepted Answer

A)   use AEC.
B)   set manual technique.
C)   A and B.

Question 9

When using a fixed kVp-variable mAs technique chart,if part thickness increases by 5 cm,what needs to happen to the mAs?

Accepted Answer

A)   It should be halved.
B)   It should be doubled.
C)   It should be quartered.
D)   It should be tripled.

Question 10

When using AEC with film-screen,what should the radiographer adjust to manipulate the overall density of the image?

Accepted Answer

A)   kVp
B)   Backup time
C)   Focal spot size
D)   Density control

Question 11

What kind of chart uses a kVp value that is high enough to adequately penetrate the part but does not diminish radiographic contrast?

Accepted Answer

A)   A variable kVp technique chart
B)   A fixed kVp technique chart
C)   A fixed mAs technique chart
D)   A and B
E)   A and C

Question 12

Once a predetermined amount of radiation is transmitted through a patient to the AEC detector,which of the following occurs?

Accepted Answer

A)   The x-ray exposure increases.
B)   The x-ray exposure decreases.
C)   The x-ray exposure terminates.
D)   A and B.

Question 13

Which of the following terms does not belong in the list?

Accepted Answer

A)   Photodiode
B)   Ion chamber
C)   Ionization chamber
D)   mAs readout

Question 14

Exposure time will ______ using AEC when patient thickness decreases.

Accepted Answer

A)   decrease
B)   remain the same
C)   increase
D)   double

Question 15

What are calipers used for?

Accepted Answer

A)   To measure the mA
B)   To select the kVp
C)   To select focal spot size
D)   To measure the part

Question 16

Where is the sensor located in an automatic exposure device that converts light into an electrical signal?

Accepted Answer

A)   In front of the patient
B)   Behind the image receptor
C)   In front of the image receptor
D)   On the tabletop

Question 17

With modern x-ray equipment,the AEC system's minimum response time is typically:

Accepted Answer

A)   1 ms.
B)   10 ms.
C)   50 ms.
D)   100 ms.

Question 18

Where is the sensor located in an automatic exposure device with a gas-filled chamber?

Accepted Answer

A)   In front of the patient
B)   Behind the Bucky tray
C)   In front of the image receptor
D)   On the tabletop

Question 19

Two identical rooms having the same generator and tube and installed at the same time do not require development of separate technique charts.The chart for one room can accurately be used in the other.

Accepted Answer