Equation Flashcards

(64 cards)

1
Q

Period Equation

A

1/f

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2
Q

Frequency Equation (period)

A

1/T

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3
Q

Frequency Equation (wavelength)

A

c / WL

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4
Q

Wavelength Equation

A

c (1.54 mm/us) / f

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5
Q

Propagation Speed

A

Elasticity/density

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6
Q

Amplitude equation

A

1/2 (max amp - min amp)

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7
Q

Intensity Equation

A

Power / Area

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8
Q

Pulse Duration Equation

A

cycles X T
# cycles / f

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9
Q

Spatial Pulse Length Equation

A

cycles X WL

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10
Q

Pulse Repetition Period (PRF) Equation

A

1 / PRF

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11
Q

Pulse Repetition Period (Depth) Equation

A

13 us X Depth

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12
Q

Pulse Repetition Frequency (PRP) Equation

A

1 / PRP

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13
Q

Pulse Repetition Frequency (Depth) Equation

A

77,000 / Depth

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14
Q

Duty Factor Equation

A

(PD / PRP) X 100

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15
Q

Beam Uniformity Coefficient Equation

A

SP / SA

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16
Q

Temporal Average Equation

A

PA X DF

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17
Q

Attenuation Coefficient Equation (f)

A

f / 2

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18
Q

Attenuation Coefficient Equation (dB)

A

0.5 dB / cm / MHz

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19
Q

Total Attenuation Equation

A

Attn Co / distance

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20
Q

Half Value Layer Thickness Equation (attn co)

A

3 / Attn Co

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21
Q

Half Value Layer Thickness Equation (f)

A

6 / f

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22
Q

Impedance Equation

A

density X PS

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23
Q

Incident Intensity Equation

A

Reflected intensity + Transmitted Intensity

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24
Q

IRC % Equation

A

(Reflected intensity / incident intensity) X 100

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25
ITC % Equation
(Transmitted intensity / incident intensity) X 100
26
IRC % (perpendicular incidence) Equation
(Z2 - Z1 / Z2 + Z1)^2 X 100
27
Snells Law Equation
sine transmission angle / sine incident angle = PS medium 1 / PS medium 2
28
Total distance Equation
1.54 X go return time
29
Range Equation (depth)
.77 X go return time
30
Bandwidth Equation
max f - min f
31
Q factor Equation
main f / operating f
32
Fractional bandwidth Equation
bandwidth / operating f
33
Frequency Equation (PZT)
PS of PZT / 2 x thickness
34
PZT thickness Equation
1/2 WL of PZT
35
ML thickness Equation
1/4 WL of ML
36
Focal Depth Equation
d^2 / 4 x WL
37
Focal Depth Equation (rewritten)
d^2 x f / 6
38
Axial Resolution Equation
SPL / 2
39
Lateral Resolution Equation
Beamwidth
40
Tframe Equation
pulses x PRP
41
Frame Rate Equation
1 / Tframe
42
Line Density Equation
lines / sector angle
43
Spatial Resolution Equation
lines / sector angle
44
Elevational Thickness Equation
beam height / thickness
45
Axial Resolution Equation (WL)
(WL x # cycles) / 2
46
Dynamic Range Equation (system components)
20 x log (highest / lowest)
47
Dynamic Range Equation (intensity)
10 x log (final intensity / initial intensity)
48
Mechanical Index Equation
Peak Negative Pressure / sqr root f
49
Reynolds Number Equation
( velocity x diameter x density ) / viscosity
50
Bernoulli Equation
4 (v2^2)
51
Pressure Gradient Equation
flow x resistance
52
Voltage Equation
current x resistance
53
Doppler shift Equation
reflected f - transmitted f
54
Doppler Equation
(2 x v x operating f x cos 0) / PS 154000
55
Nyquist Limit Equation
PRF / 2
56
Measured velocity Equation
true velocity x cos 0
57
Velocity Equation
(DS x 154000) / 2 x operating f x cos 0
58
Temporal Index Equation
Wp / Wdeg
59
Color Frame Rate Equation
lines per ROI x doppler packet x ROI depth
60
Sensitivity Equation
TP / (TP + FN)
61
Specificity Equation
TN / (TN + FP)
62
Accuracy Equation
(TP + TN) / (TP + FP + TN + FN)
63
Positive Predicitve Value Equation
TP / (TP + FP)
64
Negative Predicitive Value Equation
TN / (TN + FN)