If the output power setting is at 50% and this indicates 0dB, increasing the power by: Correct Answer: 3dB will increase the power output by a factor of
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An increase in power of 3dB indicates an increase of 2X the original power. Every 3dB that the power increases will double the power output. 50% x 2 = 100%
The doppler tracing demonstrates electrical noise. How can you reduce or eliminate this artifact? Correct Answer: Increase the wall filter settings
Noise can be reduced by decreasing doppler gain, increasing wall filter settings or trying another wall outlet.
Which of the following is true regarding the Curie point of a piezoelectric element? Correct Answer: If the active PE crystal is heated to this temperature, the element will lose its piezoelectric properties.
Certain ceramic elements can be polarized by heating them above their Curie point. If the active element is heated again, it will lose its piezoelectric properties
What dimension of the mass is being measured on this image? Correct Answer: AP
The spatial resolution on a CRT monitor is directly related to: Correct Answer: The number of lines per frame
The vacuum tube TV (CRT) monitor interfaces two fields together to from an image frame. The more lines in each field, the better the spatial resolution on the image
What system component is not needed when an LCD monitor is used? Correct Answer: digital to analog converter
LCD monitors accept the digital signal and do not need the component
The matching layer for a txd is usually made of plastic and its approx: Correct Answer: ¼ of the probe wavelength in thickness
If the radius of a blood vessel decreases by 50% what happens to the flow volume? Correct Answer: decreases by 16
Radius decreases by 1/2, flow volume decreases by 2 to the fourth power (16x); if the radius decreases to ⅓ original size, the flow volume decreases by 3 to the fourth power (81x). Note the significant change in flow value from, a 50% reduction in radius to a 66% reduction in radius
Why is there no color flow displa [Show Less]