ARDMS (American Registry for Diagnostic Medical Sonography) Practice Test

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The best axial resolution will be apparent if the sonographer performs an exam with a transducer that has which characteristic?

  1. Longer pulse length

  2. Longer wavelength

  3. Shorter pulse length

  4. More ringing in the pulse

The correct answer is: Shorter pulse length

The best way to achieve high axial resolution is by using a transducer with a shorter pulse length. This is because a shorter pulse length allows for better spatial accuracy, resulting in clearer and more precise images. The other options, such as longer pulse length and longer wavelength, decrease the resolution and result in more blurred images. Additionally, having more ringing in the pulse can also degrade the image quality as it leads to overlapping signals and decreased contrast.

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