Brainscape's Knowledge GenomeTM

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


See full index

DMSO > System reverse > Flashcards

System reverse Flashcards

1
Q

reverse

basicas are interchangable between manufactureres

reduces scan time in a clinical setting

know your controls

A

Knobology

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

reverse

varies energy transmitted to patient

should be used at lowest level

ALARA limit

higher power=brighter image

A

Acoustic power/transmit power

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

reverse

operator controlled

determines electrical voltage to pulsar

low voltage=gentle PZT vibration

high voltage=forceful vibration

A

transmit power controls

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

reverse

creates electrical signals that excite the PZT crystals

only functions during transmission

operator controlled

0-500 volts

important in Bioeffects

A

Pulsar

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

reverse

0-500 volts

high =brighter image

also called output gain, accoustic power, energy output or transmitter output

A

Pulsar voltage

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

reverse

Thermal Index

Mechanical Index

A

Pulsar Standardization

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

reverse

random and persistant degradation

unwanted low level echoes

A

Noise

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

reverse

power increase raises ratio

quiality improves with increase

A

Signal to Noise ratio

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

reverse

determines time between voltage spikes

PRP Pulse repition Period

controlled by operator

A

pulser repitition

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

reverse

determines depth of scan

operator controlled

A

Pulse Repitition Period

PRP

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

reverse

continuous wave

vascular

A

Pulser single pulse

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

reverse

pulsed wave

imaging

A

Pulser numerous pulses

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

reverse

shorter listening time

shorter PRP

higher PRF

A

Shallow imaging

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

reverse

longer listening time

longer PRP

lower PRF

A

Deeper imaging

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

reverse

recieves the electrical spike from pulser and distributes to the active elements in an array transducer

used advanced microprocessor tech to produce digital format

A

Bean Former

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

reverse

proteects the electrical components in the reciever

A

Beam Former Switch

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

reverse

prepares information from returning echoes for display

5 functions

A

Reciever

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

reverse

Amplification

Compensation

Compression

Demodulation

Reject

A

5 reciever functions

19
Q

reverse

first function

affects all signal quality

receiver gain

measured in dB

adjustable

Gain/Overall Gain knob

A

Amplification

20
Q

reverse

controls degree of echo amplification or brightness or image

too much can fill artifactual echoes into a fluid structure

too little can negate echo information

A

Gain Overall Gain

21
Q

reverse

creates and image of uniform brightness

known as TGC Time Gain Compensation

DGC Depth Gain COmpensation

sompensates for the sound wave as it weakens or attentuates

A

Compensation

22
Q

reverse

operator controlled

sliders on console

structures will be same brightness regardless of depth

A

TGC

DGC

23
Q

reverse

3rd function

keeps image grayscale content with range of human eye (20 shades)

keeps electrical signal level within accuracy range

called log compression or dynamic range (DR) most common

dB

operator controlled

A

Compression

24
Q

reverse

relative term that compares on one signal to another

important in quantifying strenght of sound beams, electrical signal strenght and brightness of image

notatoin is logarithmic

A

Decibels dB

25
Q

reverse

4th function

two part process that changes electrical signals in reciever into a more suitable form for the CRt or monitor

rectifies and smooths electrical signal

NOT adjustable

no effect on image

A

Demodulation

26
Q

reverse

5th function

controls whether low level signals will be displayed

low leve signasl can be diagnostic or noise

called threshhold or suppression

operator controlled

A

Reject

27
Q

reverse

Adjustable

all signals affected identically

entire image gets brighter or darker

A

Amplification overview

28
Q

reverse

Adjustable

signals treated differently bases on reflective depth

images will be uniformly bright from top to bottom

A

Compensation Overview

29
Q

reverse

Adjustable

Signals treated differently depending on strenght

changes grayscale mapping

A

Compression Overview

30
Q

reverse

NOT adjustable

prepares electrical signals to be suitable for display

NO effect on image

A

Demodulatoin Overview

31
Q

reverse

Adjustable

Only weak signbals affected

Strong signals remain unchanged

Weak echoes appear or are eliminated from image

A

Reject Overview

32
Q

reverse

Displays the information from returning echoes

2 user controls

brightness

contrast

A

CRT

Monitor

33
Q

reverse

patient exposure to sound energy is affected by output power NOT by reciever amplification

A

Output Power

vs

Reciever Gain

34
Q

reverse

changes brightness of image

alters signal to noise ratio

alters patient exposure

bioeffect concerns

decrease this first if image too bright

A

Output Power SUmmary

35
Q

reverse

Changes brightness of entire image

does not affect signal to noise ratio

does not change patient exposure

NO bioeffect concern

increase this first if image is too dark

A

Reciever Gain Summary

36
Q

reverse

frame averaging that allows echo information to be accumulated over time

A

Persistance

37
Q

reverse

subtle texture differences will be enhanced

A

Persistence Increase

38
Q

reverse

allows user to evaluate moving structures more easily

A

Persistence Decrease

39
Q

reverse

allows image magnification by increasing the pixal size

2 types

Read

Write

A

Zoom/Magnification

40
Q

reverse

occurs after the image is stored

number of pixals or scan lines is the same as original image

Can appear blurry

A

Read Zoom

41
Q

reverse

Occurs while active scanning

box is placed on screen and the area seen within can be expanded to fill screen

number of pixals and scan lines remain the same

image is not degraded

A

Write Zoom

42
Q

reverse

Markers available to measure distance

linear

ellipsoid

trace

A

Calipers

43
Q

reverse

allows the labeling of the image

may be keyboard or preprogrammed keys

may be voice activated

A

Annotation

44
Q

reverse

allows the screen to be split in order to show 2 views of an image or compare anatomy of abnormal side to normal side

A

Dual image

DMSO (22 decks)

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