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Adult Echocardiography > Physics > Flashcards

Flashcards in Physics Deck (21):
0

During transmission of a sound, some pulses are focused. All of the following are methods of focusing during transmission Except:?

Using a matching layer

1

Two objects start at the same point. One object moves at 5mph, the other at 15mph. A sound wave is sent to one object to the second object to measure frequency, what statement is true?

The Doppler frequency will be negitive

2

An ultrasound system is on harmonic mode, the image displayed was created by reflections and a frequency of 6Mz. What is the frequency of sound emitted by transducer?

3mhz

3

All of the following are examples of post processing Except:?

Log compression

4

The sonographer can eliminate aliasing artifact experienced during Doppler exam by all of the following Except:?

Adjusting the baseline

5

A sound wave is propagating in tissue, it propagates tissue to bone the angle measured is 90 degrees, what described 90 degrees?

Oblique

6

Aliasing is an artifact observed when performing Doppler, what signal is most likely to alias?

7 MHz with a PRF of 3 kHz

7

Which of the following is most directly related to temporal resolution?

Frame rate

8

It is acceptable to describe a sound wave by all of the following except:?

Transverse

9

Two similar reflections appear on ultrasound at exactly the same depth, one is artifact, the other may be all of the following except:?

Mirror image

10

The term frequency is defined as?

Source of sound

11

Propagation speed is dependent on?

The medium though which the sound wave passes

12

As the frequency of acoustic variables increases, the wavelength?

Decreases

13

The term period is related to frequency because it is?

The reciprocal of frequency

14

Wavelength is measured in?

Millimeters

15

Absorption, reflection & scattering of sound beam can be described as?

Attenuation

16

An echo with a pericardial effusion, the m-Mode can show?

Pseudo prolapse

17

Higher frequency 4.0 creates?

Better resolution

18

Fundamental imaging transmit one and?

Receives one/same frequency

19

Harmonic imaging transmits one and?

Receives 2

20

Greater axial resolution depend on?

Bandwidth