Test 1 Flashcards

1
Q

When was the first X-ray

A

1895

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2
Q

What was the early use of X-rays

A

Dermatology, hair restoration and shoe fitting

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3
Q

What is DEXA scans good for

A

Bone density

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4
Q

How do X-rays act?

A

Like particles

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5
Q

What happen when you have more electrons

A

The higher the binding energy

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6
Q

Photon energy is directly proportional to

A

Frequency

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7
Q

Photon energy is inversely proportional to

A

Wavelength

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8
Q

What is the units for energy levels in X-rays

A

KVp

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9
Q

What is the diagnostic imaging energy level

A

50-120 KVp

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10
Q

What is SID

A

From tube to Bucky

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11
Q

What is FFD

A

Tube to Bucky

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12
Q

What is TFD

A

Tube to Bucky

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13
Q

What is SOD

A

Tube to person

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14
Q

What is OFD

A

Tube to person

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15
Q

What is OID

A

Tube to person

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16
Q

What is the inverse square law

A

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

17
Q

Inverse square law equation

A

I1/I2=d22/d12

18
Q

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

19
Q

Change in mAs formula

A

I1/I2=d12/d22

20
Q

What does KVp control

A

Quality of the picture

21
Q

What does KVp represent

A

The force of the X-ray/penetration

22
Q

What does mAs control

A

Quantity of the beams

23
Q

What do you set first on the console

A

Set the mAS first

24
Q

What is large focal spot used for

25
What is small focal spot
For extremities
26
What does the rectification step do
Keeps current going one way by using diodes
27
Three phase power is
3 60hz waves offset by 120 degrees
28
What is the evolution of the X-ray tube
Crookes, Coolidge and modern/rotating
29
What is the space charge effect
Electron cloud that is saturated with negative that prevents more electrons from joining
30
What does the line focus principle say
Increased thermal capacity = decreased image quality
31
What is the anode heel effect
The anode side has less radiation than the cathode side
32
What's the anode heel effect good for
To limit radiation exposure to thinner body parts
33
How to decrease the anode heel effect
Compensation filter, collimating tighter, increase SID
34
What side should the anode side be on
Anode side up
35
How to warm up the tube
3 exposures, 10 seconds apart. 60, 70, 80 KVp 200mAs, 1 sec