Brainscape's Knowledge GenomeTM

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


See full index

Fluoro Cram > Review > Flashcards

Review Flashcards

1
Q

Dose to the fetus is approximately ___% of mom’s skin dose.

A

2

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

In a flat panel system, closer to the pt (increases/decreases) pt dose.

A

Increases

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

In a system with ABC, image intensifier, and under table tube, moving the I
image intensifier AWAY from the pt (increases/decreases) exposure.

A

Increases

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

Leakage Limit = ___ mR at 1 meter

A

100

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

Scatter exposure (mR/hr) at:
1 foot?
2 feet?
3 feet?

A

1 foot = 500 mR/hr

2 feet = 100 mR/hr

3 feet = 50 mR/hr

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

Brightness gain = ___ x ___

A

Minification gain x flux gain

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

Equation for minification gain

A

Input diameter squared
———————————
Output diameter squared

(In inches)

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

What does KERMA stand for?

A

Kinetic Energy Released in MAtter

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

What type of interaction is this?

e-i = e-d + e-p

A

Bremsstrahlung

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

A bremsstrahlung is electromagnetic radiation produced by ___ when ___.

A

Deceleration of a charged particle

Deflected by another charged particle

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

Absorbed dose in rad x Quality factor = ?

A

Dose equivalent in rem

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

Quality factor is multiplied by the ___ to produce the ___.

A

Absorbed dose (rad)

Dose equivalent (rem)

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

Major problem of vidicons?

A

Lag

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

0.25 mm lead is required when receiving what dose of radiation? (Mrad/hr)

A

5 mrad/hr +

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

What kind of contrast is determined by the kVp?

A

Subject

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

What kind of contrast is determined by the image intensifier?

A

Detector contrast

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

When magnification increases, the field of view decreases, which does what to the minification gain/ brightness?

What is the end result on pt exposure?

A

Lowers minification gain/brightness

Raises pt exposure

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

What is the term for the total number of cycles per second available for display? (Aka frequency of video signal)

A

Bandpass

Aka bandwidths

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

Equation for vertical resolution

A

Number horiz. lines across
——————————————
2 x diameter in mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
20
Q

___ is the product of scan lines, frame rate, and frequency rate

A

Bandpass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
21
Q

What sets the overall limit to resolving power capacity of the TV?

A

Bandpass

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
22
Q

Line pair grid measures what?

A

Resolution

lp/mm

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
23
Q

Occupational maximum dose

A

10 mSv x age

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
24
Q

General population max dose

A

1 mSv/yr = 0.1 rem/yr

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
25
Q

More bit depth = more what?

A

Contrast resolution

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
26
Q

You want to place the image intensifier as close to the pt as possible in order to lower pt dose. How is pt dose lowered by doing this?

A

It increases the number of X-rays intercepted by it, which means less are going through the pt

How well did you know this?
1
Not at all
2
3
4
5
Perfectly
27
Q

Which body type?

Large/heavy

A

Hypersthenic

28
Q

Which body type?

High stomach

A

Hyposthenic

29
Q

Which body type?

Average athletic build

A

Sthenic

30
Q

Which body type?

Transverse stomach

A

Hypersthenic

31
Q

Which body type?

Low or medial stomach

A

Asthenic

32
Q

Which body type?

High upper left stomach

A

Sthenic

33
Q

Which body type?

High lungs

A

Hypersthenic

34
Q

MTF is used to denote what?

A

Overall resolution

35
Q

What is the hypothetical “perfect” resolution?

A

when MTF = 1

36
Q

Fetus dose max for entire pregnancy in mSv and in rem/month (occupational)

A

Entire pregnancy: 5 mSv

Monthly: 0.05 rem/mo

37
Q

Occupational exposure limit in rad/min

A

5 rad/min

38
Q

More ideal exposure limit per minute/mA with mag at 80 kVp?

A

2.2 rad/min/mA

39
Q

Immediate RHB notification required

If total effective dose is…

A

25 rem +

(0.25 Sv)

40
Q

Immediate RHB notification required

If eye dose is…

A

75 rem +

(0.75 Sv)

41
Q

Immediate RHB notification required

If shallow skin/extremity dose is…

A

250 rad +

(2.5 Sv)

42
Q

Conversion factor is a measure of what?

A

Brightness gain

43
Q

What is this the equation for?

Intensity of output phosphor
——————————————
Input exposure rate (mrad/sec)

A

Conversion factor

44
Q

General public dose limit in mSv/hr

A

0.02 mSv/hr

45
Q

General annual public dose limit in mSv

A

1 mSv

46
Q

What 4 things influence the level of scatter radiation?

A

kVp
Area exposed
Thickness
Time exposed

47
Q

24 hr RHB notification required

If total effective dose is…

A

5 rem +

(0.05 Sv)

48
Q

24 hr RHB notification required

If eye dose is…

A

15 rem +

(0.15 Sv)

49
Q

24 hr RHB notification required

If shallow dose to skin/extremities is…

A

50 rem +

(0.50 Sv)

50
Q

Minification gain is an increase in ___ only.

A

Brightness

51
Q

Equation for minification gain

A

(Input screen diameter) ^2
————————————-
(Output screen diameter) ^2

52
Q

What is this the equation for?

Focal length in mm
—————————
Diameter in mm

A

F number

53
Q

(Lower/higher) F number = more light available

A

Lower

54
Q

The F number is basically the relative speed of the _______.

A

Camera lens

55
Q

___ graphs the relationship between density and the eradication dose

A

Characteristic curve

56
Q

___ is used to correct the resolving power to what actually would be realized in use.

A

Kell factor

57
Q

Pixel size equation

A

FOV
————-
Matrix

58
Q

Electronic gain happens from the _____.

Minification happens from the _____.

A

Accelerating anode (which speeds up electrons)

Output image

59
Q

The output phosphor converts ___ to ___.

A

Electrons —> light photons

60
Q

Image intensifier steps to take the inputted X-rays to outputted light photons

A
  1. X-rays —> light photons
  2. Light photons absorbed —> electrons
  3. Electrons —> accelerated
  4. Accelerated electrons —> focused
  5. Focused electrons —> light photons
61
Q

The ohotocathode absorbs ___ and puts out ___.

A

Light photons —> electrons

62
Q

The electrostatic lens focuses what where?

A

The accelerated electrons onto the output phosphor

63
Q

Which focal spot?

Manufacturer’s stated anode target size

A

Nominal

64
Q

Which focal spot?

X-ray beam length and width

A

Effective

65
Q

Which focal spot?

Area of the anode that’s actually struck by the X-ray

A

Actual

66
Q

Which focal spot?

Projected focal/anode target size measured at the image receptor

A

Measured

Fluoro Cram (8 decks)

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