Brainscape's Knowledge GenomeTM

Browse over 1 million classes created by top students, professors, publishers, and experts.


See full index

Radiography I > Chapter 2 From Notes > Flashcards

Chapter 2 From Notes Flashcards

1
Q

The filament is made of

A

coiled tungsten wire

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
2
Q

Focusing Cup is made of

A

Molybdenum or Nickle

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
3
Q

Anode is made of

A

(90%) Tungsten, (10%) Rhenium, embedded with Molybdenum and Graphite

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
4
Q

In order to help xrays exit tube the anode is

A

beveled/angled

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
5
Q

Why is Tungsten efficient at producing xrays?

A

High melting point

Atomic number 74

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
6
Q

In Mammography what comprises 97% of the target

A

Molybdenum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
7
Q

Another purpose of anode is to ________________ away from tube so tube is not damaged

A

Dissipate Heat

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
8
Q

The physical area that is bombarded by electrons during x-ray production

A

AFS

Actual Focal Spot

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
9
Q

Tube housing is lined with ______ for additional shielding from leakage

A

Lead

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
10
Q

The 1% x-ray beam is comprised of

A

Brehms and Characteristic

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
11
Q

Brems above 70kVp

A

85-90% of primary beam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
12
Q

Brems below 70kVp

A

100% of beam

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
13
Q

Projectile electrons interact with electrons from K or inner shell of atoms on anode

A

Production of Characteristic Radiation

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
14
Q

Is Characteristic radiation produced below 70kV?

A

N0

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
15
Q

above 70kV the amount of the primary beam that is characteristic is

A

10-15%

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
16
Q

X-ray energy measured in

A

kiloelectron volts or kEv

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
17
Q

The xray beam is heterogeneous or polyenergetic

A

emission spectrum

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
18
Q

Positive pressure switch in fluro

A

Deadman’s Switch

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
19
Q

Filament current operates at _______amps & about _______volts

A

3-5amps and about 6-12volts

20
Q

Frequency and wavelength are _________ proportional

A

Inversely

21
Q

Electron cloud in front of filament

A

Space charge

22
Q

Tendency of space charge to not allowed more electrons to be boiled off. Focusing cup forces __________ to stay together.

A

Space Charge Effect

23
Q

Flow of electrons from cathode to anode displays on mA meter when exposure takes place

A

Tube Current

24
Q

Controls patients dose.

A

mA

25
Q

Controls grey scale

A

kV

26
Q

Long scale, low contrast, more colors, decreased patient dose, wide latitude, increased scatter

A

High kV

27
Q

Increases volts and decreases amps to produce kilovoltage

A

Step-up transformer

28
Q

The types of transformers

A
  1. Single phase
  2. Three phase
  3. High frequency
29
Q

Decreased ripple effect=

A

Increased efficiency

30
Q

“More fifty shades of grey”=

A

Great penetration

31
Q

Used to measure tube current or number of electrons flowing per unit time between cathode and anode

A

Milliamperage

32
Q

Density=

A

receptor exposure

33
Q

Determines length of time that x-ray tube produces x-rays

A

Exposure time

34
Q

Exposure time X mA=

A

mAs

35
Q

Measured directly under anode targer

A

EFS

Effective Focal Spot

36
Q

Large FS can withstand heat produced by large exposures

A

100 mAs

37
Q

Small FS gives what?

A

Better image quality/Detail

38
Q

The SMALLER the anode angle, the smaller the _______________

A

EFS

Effective Focal Spot

39
Q

**The PROJECTED of EFS is ____________ than the AFS

A

SMALLER

40
Q

Too high of an mAs with too small of a FS.

Affects detail and spatial resolution

A

BLOOMING

41
Q

XRays are stronger on which side of tube?

A

Cathode

42
Q

Put thickest part of anatomy at what side of tube?

A

Cathode

FAT-CAT

43
Q

Three things to enhance Anode Heel Effect

A
  1. Steep/small anode angle
  2. Short SID
  3. Long IR
44
Q

Filtering removes what kind of wavelengths?

A

Maximum

45
Q

Inherent=

A

Glass envelope
Oil
Mirror

Radiography I (2 decks)

Brainscape helps you reach your goals faster, through stronger study habits.
© 2024 Bold Learning Solutions. Terms and Conditions