Knobology

Question 1

Determines the strength of the pulse transmitted into the body.
Returning echoes are stronger when the transmitted pulse is stronger; thus the image is brighter,
displayed as decibels (dB) or percent maximum

Answer 1

Power output

Question 2

Allows the sonographer to amplify or boost echo signals. Is done to compensate for the attenuation of sound in deeper tissues
Acoustic exposure to the patient remains unchanged when the receiver gain is increased
it it is set too high, artifactual echo noise will be displayed throughout the image

Answer 2

Gain

Question 3

Allows the sonographer to amplify receiver gain gradually at specific depths.
Sometimes referred to as depth gain compensation(DGC)
Depth of interface is determined by the amount of time it takes for transmitted sound pulse to return to the transducer

Answer 3

TIme Gain Compensation

Question 4

Allows transducer to focus transmitted sound at different depths.
As multilevel focusing is used, frame rate decreases

Answer 4

Focal zone

Question 5

Allows the sonographer to adjust the depth and width of an image.
Larger or deeper field of view causes the frame rate to decrease.
Depth is displayed in centimeters on the side of the image
Width adjusts horizontal axis of the image and may be used to reduce side lobe artifacts

Answer 5

Field of view

Question 6

Eliminates both electronic noise ans low-level echoes from the display. Done internally in computer

Answer 6

Reject

Question 7

Range of input signal levels produces noticeable changes in the output of the device

Answer 7

Dynamic range

Question 8

Generally produces high contrast. Echocardiography and peripheral vascular

Answer 8

Low dynamic range

Question 9

Shows more shades of gray and lower contrast.

Abdominal and obstetrics

Answer 9

High dynamic range

Question 10

Write zoom, increases detail

Answer 10

Zoom

Question 11

Captures the image, must be without motion, patient holding breath

Answer 11

Freeze

Question 12

Increase (down PRF) decreases (up PRF)

Answer 12

Depth

Question 13

Color box used, you determine angle of box

Answer 13

CF= Color Flow Doppler

Question 14

Cursor and sample volume used, gate (size of sv), angle

Answer 14

PW= Pulsed Wave Doppler

Question 15

Blind, no image. Positive/ negative flow by sound

Answer 15

CW= Continuous wave Doppler

Question 16

Divides image into two screens, rt and lt, you scan, placement

Answer 16

L R (Dual Screen)

Question 17

Calipers used to measure distance, velocity, resistivity indexes

Answer 17

Measure

Question 18

Used for labeling each image, text typing

Answer 18

Comments

Question 19

Can clear measurements or comments

Answer 19

Clear

Question 20

“Sets” caliper so additional caliper can be activated for measurements

Answer 20

Set

Question 21

Can narrow field of view, increases PRF= increases image quality

Answer 21

Scan area

Question 22

Moves calipers, color box, sample volume/ cursor, controls zoom box size

Answer 22

Track ball

Question 23

Send certain sound waves at (ex) 4MHz, “receijves” only 8MHz returning

Answer 23

Harmonics

Question 24

Characterature of body, used on image page for location instead of text

Answer 24

Body pattern

Question 25

Used to measure circular objects-HC and AC, ex

Answer 25

Ellipse

Question 26

M-mode and Doppler cursor

Answer 26

M/D cursor

Question 27

Controls number of, and position of focal zones

Answer 27

Focal zone/ Depth

Question 28

Decibels, gray scale control
up dB= up Grayscale
down dB=down grayscale (more contrast)

Answer 28

dB

Question 29

Programmed soft touch keys

Answer 29

Annotations

Question 30

Start of new exam, new patient. enter pt information here

Answer 30

PT ID

Question 31

On keyboard, deletes entire word at a time

Answer 31

Word delete