What is the most likely cause for a beam thickness artifact?

The near zone length of an unfocused transducer depends on

Which of the following organelles is found in autotrophic, eukaryotic cells that gives plants it’s green pigmentation?

One of your butterfly swimmers on the university team has a forward head and protracted/rounded shoulders bilaterally and is complaining of significant anterior shoulder pain.  How would you fix this condition?

Which letter corresponds to the backing (damping layer) of the transducer in the following image?  

Which of the following produces false echoes that are occasionally seen in fluid-filled masses? 

What type of resolution is degraded in the presence of grating lobes and side lobes?

An artifact that would least likely produce a pseudo-mass is

Which of the following relates to bandwidth and operating frequency? 

Which of the following is a commonly used backing material for continuous wave Doppler transducers?