Dsvt Ch. 2 Review

Front 1

Describe the relationship between the strength of a returning Echo and the brightness of the dot on the display in brightness mode

Back 1

Strong reflection = bright

Weak reflection = dark

Front 2

A-mode

Back 2

Amplitude mode. Nearly obsolete. Single beam analyzed.

X = depth

y = amplitude

Front 3

B-mode

Back 3

Brightness mode.

Front 4

B-scan

Back 4

Outdated technology. Not real time

Front 5

M-mode

Back 5

Motion mode. Used in Echo and Obi to see fetal heart rate

X = time

Y = depth

Front 6

Doppler

Back 6

🔹 Spectrum

🔹 color

🔹 power

🔹 duplex = combination

Front 7

Which AutoZone application commonly uses M-mode

Back 7

Echo and Obi to see fetal heart rate

Front 8

Describe duplex Imaging

Back 8

Duplex = combination of two or more us modes

Front 9

What is the purpose of a scan converter

Back 9

Converts analog to digital and vice versa

Front 10

Five main components of the transducer assembly

Back 10

🔹 Crystal pzt

🔹 matching layers

🔹 damping material

🔹 case

🔹 cable / wire

Front 11

Linear array transducer footprint and shape

Back 11

Elements arranged in line. Rectangular image

Front 12

Vector ultrasound transducer Footprints and shape

Back 12

Small footprint. Trapezoidal image

Front 13

Sector ultrasound transducer footprint and shape

Back 13

Small footprint pie-shaped image

Front 14

Curved array transducer footprint and shape

Back 14

Elements arranged convexly. Fan shaped image

Front 15

Multi d array footprint and shape

Back 15

3D and 4D Imaging

Front 16

Briefly explain 4D Ultrasound

Back 16

Real-time 3D imaging

Front 17

Ultrasound harmonics characteristics

Back 17

🔹 twice the fundamental frequency

🔹 generated as sound propagates through tissue

🔹 remove noise from Imaging