Chapter 7 & 8

Question 1

What 4 things are required to produce an X-ray

Answer 1

Vacuum - tube housing
Source of electrons - filaments
Rapid acceleration of electrons by voltage
Target to stop the moving electrons

Question 2

What is the X-ray leaving the tube known as

Answer 2

X-ray photons
X-ray beam

Question 3

Beam before it reaches the patients and interacts with the patients body

Answer 3

Primary radiation

Question 4

Beam that exits the patients body

Answer 4

Remanent radiation

Question 5

Beam interacts with the patients body and then changes direction becomes what?

Answer 5

Scatter radiation

Question 6

Diagnostic image is what?

Answer 6

A good quality image

Question 7

Nondiagnostic image is what?

Answer 7

Repeated image

Question 8

Something stops the beam from coming through is what

Answer 8

Radiopaque

Question 9

Something that the beam passes easily through is what

Answer 9

Radiolucent

Question 10

Is the X-ray table radiopaque or radiolucent

Answer 10

Radiolucent

Question 11

Milliampere-seconds (mAs) controls what

Answer 11

Quantity of photons - brightness

Question 12

How do you calculate mAs

Answer 12

Milliampere x seconds

Question 13

Kilovolt peak (kVp) controls what?

Answer 13

Quality of the photons - contrast

Question 14

What are the two types of image receptors

Answer 14

Computed radiography
Digital radiography

Question 15

Which IR uses a cassette with imaging plate that receives the exposure.

Answer 15

Computed radiography

Question 16

Which IR uses a cassette less imaging plate that displays on a monitor

Answer 16

Digital radiography

Question 17

What is density

Answer 17

Overall blackening of the film - now known as IR exposure (brightness)

Question 18

What can you use to lighten and darken the overalls brightness of the digital image

Answer 18

Window level

Question 19

What is contrast

Answer 19

Visibility of detail. Ratio of black to white

Question 20

What is window width?

Answer 20

Control for contrast

Question 21

High contrast means what

Answer 21

Few grey tones
Short scale
Narrow exposure latitude
Low kVp

Question 22

Low contrast means what

Answer 22

Many gray tones
Long scale contrast
Wide exposure latitude
High kVp

Question 23

Which end is negative : Cathode or anode

Answer 23

Cathode

Question 24

Which end is positive : cathode or anode

Answer 24

Anode

Question 25

What is the only part of the X-ray tube that is outside of the glass housing

Answer 25

Stator

Question 26

What does the photons come out of

Answer 26

Port

Question 27

Where do the electrons come from

Answer 27

Filaments in the focusing cup

Question 28

What do the electrons strike in the X-ray tube

Answer 28

Anode disk made of tungsten/rhenium

Question 29

What holds the anode disk in place

Answer 29

Anode stem

Question 30

What is the anode stem connected to

Answer 30

Rotor and anode disk

Question 31

What holds the X-ray tube all together

Answer 31

Glass envelope

Question 32

What is the glass envelope made of

Answer 32

Pyrex

Question 33

What does the vacuum tube lack

Answer 33

Air

Question 34

What produces the X-rays

Answer 34

X-ray tube

Question 35

What powers the X-ray tube

Answer 35

Generator

Question 36

What is the ceiling suspension for the X-ray tube called

Answer 36

Overhead tube crane

Question 37

Where does the collimate sit

Answer 37

Below the X-ray tube

Question 38

What controls the size and shape of the field size

Answer 38

Collimator

Question 39

Which end is the cathode always on

Answer 39

Right

Question 40

Which side is the anode always on

Answer 40

Left - patients head

Question 41

Where is the bucky mechanism

Answer 41

Under the X-ray table

Question 42

What does the Bucky mechanism have to be aligned with

Answer 42

The light source

Question 43

Who made the Bucky tray

Answer 43

Gustave Bucky

Question 44

Which X-ray table is curved on the outside

Answer 44

Fluoroscopy table

Question 45

What does unwanted exposure cause

Answer 45

Fog