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0

What are the radiation units for EXPOSURE (Customary and SI)?

1. Customary
2a. SI
2b. SI

1. Roentgen (R)
2a. Air Kerma (Gya)
2b. Coulombs per Kilogram (C/kg)

1

What are the radiation units for ABSORBED DOSE (Customary & SI)?

1. Customary
2. SI

1. Rad
2. Gray (Gyt)

2

What are the radiation units for EQUIVALENT DOSE (Customary & SI)?

1. Customary
2. SI

1. Rem
2. Seivert (Sv)

3

What are the radiation units for RADIOACTIVITY (Customary & SI)

1. Customary
2. SI

1. Curie (Ci)
2. Becquerel (Bq)

4

When converting SI units and Customary units, ___ Customary units = ___ SI units. (Except for Coulombs***)

100 Customary= 1 SI

5

Exposure in air: 1 Roentgen is also equivalent to _____ x 10^-4 C/kg

2.58

6

What are the two internal components of the xray tube?

Anode
Cathode

7

What are the three external components of the xray tube?

Support Structure
Protective Housing
Glass Envelope or Metal Enclosure

8

The tube housing is required to reduce radiation to less than:

100mR/hr

9

Which design does the tube envelope resemble?

Coolidge

10

The Cathode is made up of ________ tungsten.

Thoriated

11

(Dual Focus Tubes/ Filaments)

Large filaments produce ____ - 1.2 mm focal spots.

0.4

12

(Dual Focus Tubes/ Filaments)

Small filaments produce ____ - 0.5mm focal spots.

0.1

13

What is the most common cause of tube failure which in turn leads to filament breakdown?

Tungsten Vaporization

14

The stator is powered by an induction motor and creates a magnetic field which measures in between _______ - ________ RPM.

3,600-10,000

15

Pitting due to slow rotation and exceeding heat capacity is an example of:

Anode Failure

16

The physical area of the focal track that is impacted is called:

Actual focal spot

17

The area of the focal spot that is projected out of the tube toward the object being radiographed is called;

Effective

18

The angling of the target area on the anode is called:

Line focus principle

19

As the anode angle decreases, the ______ focal spot decreases.

Effective

20

The only advantage of a large focal spot is increased _______ _________.

Heat Capacity

21

The blurring on the edge of an organ or bone due to the size of the focal spot is called:

Penumbra

22

Kvp, tube current, voltage wave form, length of exposure and number of exposures determine the amount of heat generated and expressed in:

Heat Units (HU)

23

In order to calculate the total Anode Cooling Factor expressed in HU, one must mulitply:

Kv x mAs x voltage waveform factor

24

The Voltage Waveform factor for single phase is:

1.00

25

The Voltage Waveform factor for Triple Phase 6 Pulse is:

1.35

26

The Voltage Waveform factor for Triple Phase 12 Pulse is:

1.41

27

The Voltage Waveform factor Triple Phase High Frequency is:

1.45

28

A reduction in radiation intensity results from a complete or partial loss of x-ray photon energy as it passes through matter. This is called:

Attenuation

29

A complete loss of energy is a form of attenuation termed:

Absorption