Introduction Flashcards

(54 cards)

1
Q

How many times per second

A

Frequency

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2
Q

What do you need to produce xrays?

A

Source of electrons, methods of accelerating electrons, a path, a target, a tube to provide a vacuum

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3
Q

Negative electrode?

A

Cathode

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4
Q

Positive electron.

A

Anode

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5
Q

How thick must lead be?

A

0.5 mm

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6
Q

How much heat is released from an X-ray?

A

99%

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7
Q

Measures number of electrons.

A

MA

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8
Q

Measures how fast and amount of energy.

A

KVP

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9
Q

Which part of an X-ray contains a filament like a light bulb?

A

Cathode

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10
Q

What does the filament create?

A

An electron cloud

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11
Q

The whiter you are…

A

Radio opaque

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12
Q

The darker you are…..

A

Radiolucent

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13
Q

What houses the filament?

A

The focusing cup

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14
Q

This creates a focal spot.

A

Anode

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15
Q

The focal spot.

A

Anode

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16
Q

Sometimes is designed to spin to disburse heat.

A

Anode

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17
Q

Intensity of the X-ray is greater on what side?

A

Cathode side

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18
Q

Thicker part of of patient should be faced towards the….

A

Cathode

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19
Q

Controls the size of the X-ray beam directed?

A

Collimator

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20
Q

Lower KVP= ________ contrast and what color?

A

More contrast, more gray

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21
Q

For bone, what colors do you want and how do you achieve it?

A

Whites and blacks- high KVP

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22
Q

What MA stands for?

23
Q

More MA, ____ e- released.

24
Q

How to reduce scatter?

A

Reduce beam size, lead grids between film and the patient

25
Measured from peak to peak
Wavelength
26
What is Santes rule?
2 x Tissue thickness + 40 = KVP
27
If you use the tray, what do you add to the KVP after calculated from Santes rule?
+ 10
28
Adverse effects of not having the body oerfectly parallel?
Foreshortening, magnification, elongation
29
How do you calculate MAS?
MA x seconds =MAS
30
Also known as focal film distance.
Source image distance
31
The distance between. The focal spot of the tube and focus spot of the patient?
Focal film distance
32
Necessities of a dark room?
Clean, organized and light proof, well ventilated, white walls
33
Minimum dark room size?
6x8 feet
34
Two sides of a dark room with a dip tank?
Dry and wet side
35
Steps of film processing?
Develop, rinse (only manual), fix, wash, dry
36
What does the developing step do?
Converts invisible image to a visible image
37
What does the fixer step do?
Removed undeveloped crystals that were not exposed to electrons
38
What does the wash step do?
Removes chemicals from the X-ray film
39
How long does automatic film processing take?
90 seconds
40
How can you mark films?
Lead markers, lead tape
41
What needs to be on the X-ray label?
Name and address of hospital, date, owners name, patient name and number
42
Silver halide crystals are like....
Megapixels
43
Creates a grander image with wide latitude and large crystals.
Fast film
44
Has medium crystals, and medium detail.
Medium speed
45
High detailed speed.
Slow speed
46
What are non screen films used for?
Dental films - higher detail
47
If the film is too light...?
Increase KVP
48
If the film is too dark?
Decrease MAS (slow it down)
49
If you can't see the organs...
Increase KVP
50
If it's too light and you can see the organs....
Increase MAS
51
If the film is too dark and you see gray bones....
Decrease KVP
52
If the X-ray is too dark and you see white bone...
Decrease MAS
53
What is Santes rule?
2xcm +40
54
Factors that affect technique charts?
Voltage, film speed, age of film and screen, grid type, beam filtration