Author: Anonymous

For a multi-element transducer which of the following methods/advancements are BEST known to affect the spatial resolution defined as “the ability to accurately identify reflectors that are arranged perpendicular to the ultrasound beam”? Please select all that apply.

Match the letter to the correct beam dimension.

What receiver function would convert the signal labeled A (dotted line) to the signal labeled B (solid line)?

What is not optimized for the spectral tracing below? Note: There is one BEST answer. _______ In this particular situation, what should the sonographer do to optimize the tracing? _______

Use the following words/phrases to fill in the blanks. You may use answers more than once. narrower sensitivity created operating frequency converted pulse duration frequency fractional bandwidth wider higher wavelength lower bandwidth Quality factor is the reciprocal of _______ The formula for Q-factor is _______ divided by _______ Shorter pulses have a _______ Q-factor, which results in a _______ bandwidth. When pulses are lengthened, the Q-factor is _______ which results in increased _______ Modern transducers used for imaging generally have a _______ Q-factor, allowing greater imaging flexibility.

Which receiver function converted Image A to Image C? _______

The image and spectral tracing below are demonstrating flow in a leg vein. Velocity would not be measured (calculated) accurately on the current spectral tracing. What must the technologist change when they redo the tracing in order to accurately measure the velocity of flow? 

Which receiver function would convert the signal labeled A (dotted line) into the signal labeled B (solid line)?

Use the following lists to complete the questions below. List A List B List C List D gain decrease in the near field focus placement make it deeper TGC decrease in the far field depth make it shallower decrease increase in the near field increase increase in the far field Spleen – outlined in green Left kidney – outlined in purple Identify two settings that need to be changed to optimize the image above AND choose how you would change the setting. 1. The (Choose one answer from List A) _______ setting is not optimized. To optimize, I would (Choose one answer from List B) _______ 2. The (Choose one answer from List C) _______ setting is not optimized. To optimize, I would (Choose one answer from List D) _______

Use the image below to answer the following 3 questions. Select all the adjustments that can be made to make the artifact coming from the cervix (outlined in pale yellow) more apparent in the image below.