Exam 4: Instruments

Pixel interpolation fills in missing pixels by averaging adjacent pixels.

The ability of a gray-scale display to distinguish between echoes of slightly different intensities is called ________ resolution.

What is the maximum penetration depth with a frame rate of 32 frames per second and a line density of 100 lines per frame and using only one focus?

The signal processor filters,detects,and compresses the echo signal.

Which of the following techniques is considered the imaging version of palpation?

Which system control equalizes amplitudes by different reflector depths?

In which of the following code excitation techniques do ensembles of pulses drive the transducer to generate a single scan line? Time gain compensation make up for:

The number of voltage pulses sent to the transducer each second is called the ________.

Ultrasound pulse repetition frequency (PRF) is equal to the voltage PRF.

The frequency of the ________ determines the frequency of the resulting ultrasound pulse.

In order to image deeper structures,the ________.

Normally the number of channels does not exceed the number of ________.

The beam former amplifiers typically have ________ dB of gain.

Which of the following operator controls adjusts compression?

M (motion)-mode is a presentation of echo depth versus time.

To receive information for display at a rapid rate,it is desirable to use a ________.

If the depth of penetration is increased,the pulse repetition frequency (PRF) must be increased.

Dynamic range is the ratio of largest to smallest power that a system can handle.

The purpose of a bandpass filter is to ________.

Human vision is limited to a dynamic range of about 30 dB.