US - Understanding US Physics - 7 Flashcards

You may prefer our related Brainscape-certified flashcards:
1
Q

def GO-RETURN TIME

A

aka time-of-flight

=elapsed time from pulse creation&raquo_space; pulse reception

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

GO-RETURN TIME r/t depth

A

direct

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

avg speed - soft tissue

A

1.54 mm/micro.s

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

GO-RETURN TIME equation r/t depth

A

DEPTH (mm) = [1.54mm/micro.s x GO-RETURN TIME(micro.s)]
/ {2}

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

13 microsecond rule

A

w/ soft tissue, every 13 micro.s = 1 cm reflector depth

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

travel distance r/t reflector distance

A

travel distance = 2x reflector distance

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

draw - travel distance, reflector distance

A

note ch 7

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

def PULSE REPETITION PERIOD (PRP)

A

PRP = time from start–start of a pulse

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

PULSE REPETITION PERIOD (PRP) r/t max depth

A

direct

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

PULSE REPETITION PERIOD (PRP) r/t shallow depth

A

down PRP
shallow DEPTH

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

PULSE REPETITION PERIOD (PRP) r/t deep depth

A

up PRP
deep DEPTH

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

draw PULSE REPETITION PERIOD (PRP) r/t shallow & deep depth

A

note ch 7

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

PULSE REPETITION PERIOD (PRP) equation r/t soft tissue

A

PRP (micro.s) = IMAGING DEPTH (cm) x 13micro.s/cm

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

soft tissue - speed of sound

A

154,000 cm/s

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

PULSE REPETITION FREQUENCY (PRF) r/t max depth

A

inverse

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

PULSE REPETITION FREQUENCY (PRF) r/t shallow depth

A

up PRF
shallow depth

17
Q

PULSE REPETITION FREQUENCY (PRF) r/t deep depth

A

down PRF
deep depth

18
Q

PULSE REPETITION FREQUENCY (PRF) equation r/t image depth

A

PRF (Hz) = [77,000 cm/s] / IMAGE DEPTH (cm)

**77,000cm/s = half soft tissue–speed of sound (154,000cm/s)