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DMSO Physics > Chapter 5 Intesities > Flashcards

Chapter 5 Intesities Flashcards

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1
Q

refers to distance of space

ultrasound beams do not have the same intensity at different locations

A

spatial

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2
Q

the maximum value

A

peak

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3
Q

the mathmatical middle value

A

average

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4
Q

refers to all time, transmit and receive

a pulsed ultraousn beam does not have the same intensity at different time

A

temporal

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5
Q

refers only to the transmit time

a _____ultrasound beam does not have the same intensity at different times during the ______.

A

Pulsed

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6
Q

average intensity for the duration

ignor listening time

A

pulsed

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7
Q

loaction where the intensity is the maximum

A

spatial peak intensity

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8
Q

average intensity across the entire cross section area

A

spatial average intensity

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9
Q

intensity of a beam at the instant in time of its maximum value

A

temporal peak intensity

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10
Q

average intensity during the most intense half cycle

A

intensity max

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11
Q

average intensity during the pulse duration–transmit time

A

pulse average intensity

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12
Q

average intensity during the entire pulse repition period

Both transmit and receive time

A

temporal average intensity

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13
Q

highest to lowest temporal intenities

A

temporal peak I(tp)

I(max)

pulse average I(pa)

temporal average I(ta)

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14
Q

combining spatial and temporal factors

A

used for the study of bioeffects

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15
Q

Spatial Peak Temporal Peak

SPTP

A

measured taht the locatoin where intensity is max at the instant in time when the most powerful part of pulse passes

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16
Q

Spatial Peak Temporal Average

SPTA

A

measured at the locatoin where intensity is max and averaged over entire time, both transmit and receive

Bioeffects measurement

17
Q

Spatial Average Temporal Average

SATA

A

measured over entire cross sectional area of the sound beam over all time

18
Q

Rankings of measurement methods

A

SPTP

SATP
SPTA
SPPA
SAPA
SATA

19
Q

units of measure for intensites

A

W/cm2

20
Q

intensities may be reported in various ways with respect to time and space

A

1st commandment

21
Q

the different measurements of intensities are important in the study of Bioeffects

SPTA most relevant intensity with respect to tissue heating

A

2nd commandment

22
Q

because peak measurments are larger than average measurements, SPTP intensity has the highest value, SATA has the lowest value

A

4th commandment

DMSO Physics (16 decks)

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