Test 1

Question 1

When was the first X-ray

Answer 1

1895

Question 2

What was the early use of X-rays

Answer 2

Dermatology, hair restoration and shoe fitting

Question 3

What is DEXA scans good for

Answer 3

Bone density

Question 4

How do X-rays act?

Answer 4

Like particles

Question 5

What happen when you have more electrons

Answer 5

The higher the binding energy

Question 6

Photon energy is directly proportional to

Answer 6

Frequency

Question 7

Photon energy is inversely proportional to

Answer 7

Wavelength

Question 8

What is the units for energy levels in X-rays

Answer 8

KVp

Question 9

What is the diagnostic imaging energy level

Answer 9

50-120 KVp

Question 10

What is SID

Answer 10

From tube to Bucky

Question 11

What is FFD

Answer 11

Tube to Bucky

Question 12

What is TFD

Answer 12

Tube to Bucky

Question 13

What is SOD

Answer 13

Tube to person

Question 14

What is OFD

Answer 14

Tube to person

Question 15

What is OID

Answer 15

Tube to person

Question 16

What is the inverse square law

Answer 16

The further away from the source the less light hits the person. Thus not a clear picture. The decrease is by the square root

Question 17

Inverse square law equation

Answer 17

I1/I2=d22/d12

Question 18

At 10 feet what is the proportion of the X-ray beam you get hit

Question 19

Change in mAs formula

Answer 19

I1/I2=d12/d22

Question 20

What does KVp control

Answer 20

Quality of the picture

Question 21

What does KVp represent

Answer 21

The force of the X-ray/penetration

Question 22

What does mAs control

Answer 22

Quantity of the beams

Question 23

What do you set first on the console

Answer 23

Set the mAS first

Question 24

What is large focal spot used for

Answer 24

Torso

Question 25

What is small focal spot

Answer 25

For extremities

Question 26

What does the rectification step do

Answer 26

Keeps current going one way by using diodes

Question 27

Three phase power is

Answer 27

3 60hz waves offset by 120 degrees

Question 28

What is the evolution of the X-ray tube

Answer 28

Crookes, Coolidge and modern/rotating

Question 29

What is the space charge effect

Answer 29

Electron cloud that is saturated with negative that prevents more electrons from joining

Question 30

What does the line focus principle say

Answer 30

Increased thermal capacity = decreased image quality

Question 31

What is the anode heel effect

Answer 31

The anode side has less radiation than the cathode side

Question 32

What’s the anode heel effect good for

Answer 32

To limit radiation exposure to thinner body parts

Question 33

How to decrease the anode heel effect

Answer 33

Compensation filter, collimating tighter, increase SID

Question 34

What side should the anode side be on

Answer 34

Anode side up

Question 35

How to warm up the tube

Answer 35

3 exposures, 10 seconds apart.
60, 70, 80 KVp
200mAs, 1 sec