RESOLUTION

Question 1

THREE ASPECTS OF RESOLUTION

Answer 1

1. Spatial Resolution
2. Temporal Resolution
3. Contrast Resolution

Question 2

The ability of an imaging system to differentiate between structures, images, or events and display them as a separate entity.

Answer 2

resolution

Question 3

The ability to display two structures situated close together as separate image.

Answer 3

spatial resolution

Question 4

components of spatial resolution

Answer 4

axial and lateral

Question 5

Ability to display small targets along the path of the beam as separate entities.

Answer 5

axial resolution

Question 6

 Resolution along the axis of the beam

Answer 6

axial resolution

Question 7

axial resolution aka

Answer 7

longitudinal resolution

Question 8

latera resloution aka

Answer 8

azimuthal resolution

Question 9

 Depends upon the width of the ultrasound beam (best where the beam is narrowest)

Answer 9

lateral resolution

Question 10

formula for axial resolution

Answer 10

Spatial pulse length / 2

Question 11

unit of axial resolution

Answer 11

mm

Question 12

 Ability of the imaging system to differentiate between tissues and display them as different shades of gray.

Answer 12

contrast resolution

Question 13

 Ability of the imaging system to display events which occur at different times as separate images.

Answer 13

temporal reso

Question 14

important to echocardiography

Answer 14

temporal reso

Question 15

temoral reso is determined by

Answer 15

frame rate

Question 16

no. of images per second

Answer 16

frame rate

Question 17

two types of planes for hadling the tranducer

Answer 17

longitudinal and transverse

Question 18

longitudinal on the left and right sides are the patients

Answer 18

superior and inferior

Question 19

transverse on the left and right sides are the patients

Answer 19

right and left

Question 20

 Displays images in black and white combinations only.

Answer 20

bistable scanninga

Question 21

a mode stands for

Answer 21

amplitude mode

Question 22

 A single dimension display consisting of a horizontal baseline. This baseline represents time and or distance with upward (vertical) deflections (spikes depicting the acoustic interface)

Answer 22

a- mode

Question 23

used in opthalmology

Answer 23

a - mode

Question 24

b mode stands for

Answer 24

brightness mode

Question 25

 A two-dimensional display of the ultrasound.

Answer 25

b-mode

Question 26

 The A-mode spikes are electronically converted into dots and displayed at the correct depth from the transducer.

Answer 26

b-mode

Question 27

b-mode is aka

Answer 27

b-scan or gray scale sonography

Question 28

m - mode aka

Answer 28

motion mode

Question 29

 Used to visualize things that are physically moving. The motion occurring in a one dimensional scan line is displayed on the vertical axis over time on the horizontal axis

Answer 29

m-mode

Question 30

 This mode is most commonly used in the evaluation of cardiac valves and fetal heart activity

Answer 30

m - mode

Question 31

 uses the frequency shift of sound waves to measure velocity, typically blood

Answer 31

Doppler

Question 32

most common uses of doppler

Answer 32

o Color flow doppler CFD o Power or Angiodoppler o Spectral doppler (pulsed and continuous wave)

Question 33

how much distance into the body the image displays in the far field.

Answer 33

depth

Question 34

 Used to adjust the size of the image so that organs and adjacent structures or regions of interest are equally well visualized.

Answer 34

depth

Question 35

hihger depth = -- magnification

Answer 35

higher

Question 36

 Is a knob that adjust the overall UTZ echo signalgain

Answer 36

gain

Question 37

gain ↑ = ___ reflection =__ brightness

Answer 37

high and high

Question 38

set up as a column of sliding knobs or may be adjusted for near and far gain.

Answer 38

time gain compensation

Question 39

 Allows selective control of gain at different depths

Answer 39

TGC

Question 40

allows for the magnification of one area on the screen

Answer 40

ZOOM

Question 41

 This control is used to magnify structures of interest. Various capabilities as provided by the manufacturer.

Answer 41

KEYBOARD

Question 42

 concentrates the sound beam into a smaller beam area than would exist otherwise. This area of focus is where you will obtain your best images.

Answer 42

FOCUS

Question 43

 It can be found on the monitor (arrow), on the vertical millimeter scale

Answer 43

FOCUS

Question 44

 Determines how many shades of gray are demonstrated on an image.

Answer 44

DYNAMIC RANGE

Question 45

gives fewer grays and increases contrast

Answer 45

DYNAMIC RANGE

Question 46

Increasing dynamic range gives a wider range of ___ and decreases ____

Answer 46

GRAYS AND CONTRAST

Question 47

This control captures a single frame from a dynamic image

Answer 47

FREEZE

Question 48

allow the operator to review a sequence of acquired images

Answer 48

CINE LOOP

Question 49

 Available to measure distances

Answer 49

caliper

Question 50

 Images may be captured for archival or export

Answer 50

acquiring images