Chapter 1

Question 1

Color-Doppler display

Answer 1

the presentation of 2D, real time Doppler- shift information in color superimposed on a real-time, gray-scale, anatomic, cross-sectional image. Flow directions toward and away from the transducer.

Question 2

Doppler Effect

Answer 2

a change in frequency caused by reflector motion

Question 3

gray-scale image

Answer 3

range of brightnesses between white and black

Question 4

image

Answer 4

a reproduction, representation, or imitaiton of the physical form of a person or thing

Question 5

linear image

Answer 5

an anatomic image presented in a rectangular format

Question 6

pulse-echo technique

Answer 6

ultrasound imaging in which pulses are reflected and used to produce a display

Question 7

scan line

Answer 7

a line produced on a display that represents ultrasonic echoes returning from the body. A sonographic image is composed of many such lines.

Question 8

sector image

Answer 8

an anatomic image presented in a pie-slice shaped format

Question 9

sonography

Answer 9

medical 2D, cross-sectional, and 3D anatomic flow imaging using ultrasound

Question 10

spectral-Doppler display

Answer 10

the presentation of Doppler information in a quantitative form of Doppler shift versus time. Visual display of a Doppler spectrum.

Question 11

transducer

Answer 11

a device that converts energy from one form to another

Question 12

ultrasound

Answer 12

sound having frequency greater than what humans can hear, that is, greater than 20 kHz.

Question 13

volume imaging

Answer 13

3D imaging