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MIDS 199 - physics 2 > Review > Flashcards

Review Flashcards

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1
Q

What is
required for
fluid to flow?

A

Pressure

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2
Q

What is “dyne”
a unit of?

A

Force

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3
Q

What rule does
the following
statement
describe? “As the diameter of the
stenosis increases, flow
speed increases to
maintain flow”

A

Continuity Rule

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4
Q

In harmonic
imaging, which
harmonic
frequency is
accepted?

A

Second
Harmonic

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5
Q

What is another
term for spatial
compounding?

A

Crossbeam/SRI

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6
Q

What does this
formula
calculate?
DS = Fr-FT

A

Doppler Shift
Frequency Change (DS) = (Fr) Received Frequency –
(Ft)Transmitted Frequency

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7
Q

What does “Fo”
represent in
this equation?
F(DS) = (2 Fo V)/c

A

Fo = Operating
Frequency

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8
Q

When Doppler angle
increases, Doppler
shift frequency
_____?

A

Decreases

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9
Q

What is the
recommended PRF for
a Cardiac Exam?

A

60 - 80 cm/s

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10
Q

This “limit” refers to
the highest
detectable Doppler
frequency shift
without aliasing.

A

The Nyquist Limit

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11
Q

What has to be
completed before
quality control can
occur?

A

Quality Assurance

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12
Q

Who is responsible for
daily quality control in
an US department?

A

Technologists

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13
Q

STIC is short for?

A

Spatio-temporal
image correlation

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14
Q

Sensitivity is also
called:

A

The true positive rate

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15
Q

Specificity is the
proportion of people
without the disease
who will have a ____
result.

A

Negative Result

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16
Q

This is the downside
of having a highly
sensitive test.

A

High false positive
rate

17
Q

These three factors
take up microbubbles
in US contrast.

A

Immune system, liver,
spleen

18
Q

This common contrast
agent brand is used
by Island Health.

A

Definity

19
Q

Ultrasound contrast
microbubbles consist
of these two primary
components.

A

PEG shell, gas core

20
Q

ABUS is short for?

A

Automated Breast
Ultrasound

21
Q

Automated Breast
Ultrasound is used for
this purpose.

A

Screening dense
breasts

22
Q

POCUS is short for?

A

Point of care
ultrasound

23
Q

SonoCNS is a type of
this technology?

A

Artificial Intelligence

24
Q

B Flow Imaging can be
used to best depict
this type of flow?

A

Trickle Flow

25
Q

Which materials have
a larger strain?

A

Soft Materials

26
Q

This formula is used to
measure the stiffness
of a material.

A

Young’s Modulus

27
Q

This method of
elastography only
generates qualitative
information.

A

Static elastography

28
Q

A shear wave is also
known as this type of
wave.

A

Transverse Wave

29
Q

How far below the
liver capsule should
the Shear Wave box
be placed?

A

1-2 cm

30
Q

IQR is short for?

A

Inter Quartile Range

31
Q

What units are Shear
Wave results reported
in?

A

kPa

32
Q

What kPa is the cut-
off for Cirrhosis?

A

> 11.9 kPa

MIDS 199 - physics 2 (12 decks)

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