Ch. 10 Test

Question 1

DR stands for:

Answer 1

digital radiography

Question 2

CR stands for:

Answer 2

computed radiography

Question 3

T/F - The imaging plate used in a computed radiography system is non-removable,

Answer 3

false

Question 4

T/F - Digital radiography systems use removable imaging plates.

Answer 4

false

Question 5

Which of these are not part of the CR system:
Plate Reader
Cassette
PSP
Computer Workstation
TFT

Answer 5

TFT

Question 6

What is the backing material of a CR cassette made of?

Answer 6

aluminum

Question 7

Phosphor layers of the PSP can be of two types.
____ means that the crystals are randomly distributed, ____ means that the crystals are columnar, resembling needles standing on end, that are densely packed together

Answer 7

turbid, structured

Question 8

T/F - CR PSP phosphor layers are made of europium with a barium fluorohalide activator.

Answer 8

false

Question 9

T/F - When a PSP is irradiated, electrons get trapped in the conduction band, just outside of the valence.

Answer 9

true

Question 10

T/F - CCD/CMOS are used in direct capture methods.

Answer 10

false

Question 11

T/F - TFTs are used in direct capture methods.

Answer 11

true

Question 12

This DR component does what a PSP does in CR systems.

Answer 12

scintillator/photodetector

Question 13

T/F - CMOS is widely available in all forms of radiology.

Answer 13

false

Question 14

The photoconductor used in direct capture DR systems is made of:

Answer 14

amorphous selenium

Question 15

This graphic representation of data is what the computer uses to create the image.

Answer 15

histogram

Question 16

The ____ scan is what moves the IP through the reader, the ____ scan is the laser scan of the IP.

Answer 16

slow, fast

Question 17

Sampling frequency must be at least ____ times that of input frequency bandwidth.

Answer 17

2

Question 18

T/F - DR imaging receptors use every single pixel of the receptor to create the image.

Answer 18

false

Question 19

S numbers are ____ proportional

Answer 19

inversely

Question 20

EI numbers are ____ proportional

Answer 20

directly

Question 21

DAP can be used in ____ systems as an exposure indicator.

Answer 21

DR

Question 22

____ is a measurement of how efficient a receptor is at converting x-ray energy into a diagnostic image.

Answer 22

DQE

Question 23

____ is the main controller of contrast in film-screen imaging.

Answer 23

kVp

Question 24

____ is the main controller of contrast in digital imaging

Answer 24

LUT

Question 25

Imaging plates from CR cassettes should be cleaned every ____ months.

Answer 25

3

Question 26

____ is the standard language of PACS systems.

Answer 26

DICOM

Question 27

T/F - 100% DQE is ideal and is achievable.

Answer 27

false

Question 28

____ is the measure of exposure in air, measured at the collimator.

Answer 28

DAP

Question 29

This is the component that converts signal into a usable form for the computer to use in image formation.

Answer 29

ADC

Question 30

What are the classifications of PACS storage types.

Answer 30

• online
• nearline
• offline

Question 31

T/F - Automatic rescaling can correct any exposure error.

Answer 31

false

Question 32

T/F - Technologists should window and level as needed to ensure images look the best possible before sending them for interpretation.

Answer 32

false

Question 33

Indirect capture uses ____, while direct capture uses ____.

Answer 33

amorphous silicon, amorphous selenium

Question 34

T/F - The radial styloid is more proximal than the radial tuberosity.

Answer 34

false

Question 35

T/F - When standing in anatomic position, the 1st digit is more lateral to midline than the 5th digit .

Answer 35

true

Question 36

T/F - The navicular is a bone of the hand.

Answer 36

false

Question 37

T/F - Epicondyles of the humerus are distal to the humeral head.

Answer 37

true

Question 38

T/F - The tubercles of the humerus are more proximal than the epicondyles.

Answer 38

true

Question 39

T/F - The CMC joints of the hand are more distal than the MCP joints.

Answer 39

false

Question 40

T/F - The medial malleolus of the tibia is distal to the tibial plateau.

Answer 40

true