Modes, Mechanical transducers, Linear phased array transducer

One dimension: undirectional: depth upward spikes

(a)  

Which mode appears as a series of upwards spikes?

• A mode

• B mode

• M Mode

(a)   mode displays are created as a sound pulse is emitted by the transducer, a dot moves at a constant speed across the systems display

(a)   mode displays are created when a reflection returns to the transducer, it is processed and the moving dot is deflected upward on the screen

The height of the upward deflection is (a)   to the amplitude of the returning echo

Strong echoes create (a)   spikes

Weak echoes create (a)   spikes

Which axis of an A mode display represents reflector depth?

• X-axis

• Y-axis

• Z-axis

Which aspect of the A-mode is derived from the time-of-flight information of the sound pulse?

• Amplitude

• Pulse duration

• Depth

• PRF

Which axis of an A-mode display represents reflection amplitude?

• x-axis

• y-axis

• z-axis