Kremkau Ch1

Question 1

Color-Doppler display

Answer 1

Color-coded presentation of Doppler information superimposed on gray-scale images. Measures tissue motion and blood flow.

Question 2

Doppler effect

Answer 2

Change in frequency caused by a moving object.

Question 3

Gray-scale image

Answer 3

Produced by the brightness of each dot corresponding to the echo strength.

Question 4

Image

Answer 4

Reproduction, representation of the physical form of a person or object.

Question 5

Linear image

Answer 5

Rectangular image produced by the Linear -array transducer. Pulses travel in the same direction and yield vertical parallel scan lines .

Question 6

Pulse-echo technique

Answer 6

Pulses generated by the transducer are sent into the patient, where they produce echoes at organ boundaries within tissue. Echoes are then returned to the transducer.

Question 7

Scan line

Answer 7

A series of dots sent into the tissue by one pulse.

1 pulse = 1 scan line

Question 8

Sector image

Answer 8

Produces a slice of pie image shape. Each pulse originates from the same starting point but, pulses go out in slightly different directions

Question 9

Sonography

Answer 9

Anatomic image of tissue or object using ultrasound is accomplished using a pulse-echo technique.

Question 10

Spectral-Doppler display

Answer 10

Doppler information is applied to the loudspeakers for audible evaluation and to spectral displays for quantitative analysis.

Question 11

Transducer

Answer 11

The transducer generates the ultrasound pulses and receives the returning echoes.

Question 12

Ultrasound

Answer 12

Sound above 20 kHz, higher then what humans can hear. Animals use ultrasound to detect, locate, determine the motion of, and capture prey.

Question 13

Volume imaging

Answer 13

3D image, echo data acquired by many 2D sections of echo information.