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References

Edelman, S. K. (2012, July 1). Understanding Ultrasound Physics. E.S.P. Ultrasound. http://books.google.ie/books?id=I-_XMQEACAAJ&dq=understanding+ultrasound+physics&hl=&cd=1&source=gbs_api

Penny, & Fox. (2018). Examination Review for Ultrasound: Sonographic Principles and Instrumentation (2nd ed.) [Book]. Wolters Kluwer.

Sonography Minutes. (2021, July 14). Ultrasound Physics Review | Beam Artifacts | Sonography Minutes [Video]. YouTube. Retrieved April 7, 2024, from https://www.youtube.com/watch?v=acajnW8nYE0

Sononerds. (2021, November 6). Ultrasound Physics with Sononerds Unit 12b [Video]. YouTube. Retrieved April 7, 2024, from https://www.youtube.com/watch?v=0rmwXyPXwhs&t=14s

Stephano. (2021, September 9). Slice thickness artifact. Partial volume artifact. Elevational resolution. [Video]. YouTube. Retrieved April 8, 2024, from https://www.youtube.com/watch?v=v1IC9M0CflM

Ultrasound Imaging. (2016, September 17). Radiology Key. Retrieved April 7, 2024, from https://radiologykey.com/ultrasound-imaging-2/#CR3

The results

Sonographically...

Provide statistics, go into detail, or more — whatever works best for your presentation.

  • Artificial echoes appear within anechoic structures

  • Typically seen in:

- bladder

- gallbladder

- vessels

- cysts

(Sonography Minutes, 2021)

What is Slice Thickness?

Slice thickness artifact occurs when structures above or below the ultrasound beam create reflections that appear in the image.

**aka section thickness artifact, or partial volume artifact**

(Edelman, 2012)

How does it work?

Trans Bladder

1

  • related to elevational resolution (height of beam)
  • the US beam is not very thin (thin slice of cheese), it is 3-dimensional
  • 3 dimensions
  • lateral (width)
  • axial (length)
  • elevational (height)
  • The height (elevation) of the beam is determined by the transducer

(Sonography Minutes, 2021)

5

(Ultrasound Imaging, 2016)

2

Violated Assumptions

Slice Thickness

6

Artifact Presentation by Lindsey Haney

The assumption that the ultrasound beam is extremely thin, is invalid.

(Edelman, 2012)

3

Quote or caption here

1

4

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How is it harmful OR helpful to the diagnostic process?

How can we avoid slice thickness artifact?

Helpful:

- the thinner the elevational thickness, the more accurate your resolution will be

Harmful:

- can cause confusion with hemorrhage, infection, solid tissue, sludge, etc.

(Sonography Minutes, 2021), (Stephano, 2021)

  • Slice thickness artifact can be avoided/reduced by using transducers that produce thinner imaging planes.

  • elements (crystals) that are disc shaped create the best elevational resolution we don't use these types of transducers anymore, though

  • out of the modern transducers that we use today, the 1 1/2 D array transducers improve elevational resolution the best

  • adjusting focal zone may help (depending on the transducer)

(Edelman, 2012), (Penny & Fox, 2018), (Sononerds, 2021)

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