Why Do Ultrasound Axial Resolution Phantoms Show Stretched Black Dots?

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SUMMARY

The discussion centers on the phenomenon of stretched black dots observed in ultrasound axial resolution phantoms, specifically referencing the Gammex 411LE ultrasound phantom. The stretching of these dots is attributed to beam softening effects, which occur when the ultrasound beam interacts with different tissue densities, leading to variations in image representation. Understanding this effect is crucial for accurate interpretation of ultrasound images and improving diagnostic accuracy.

PREREQUISITES
  • Understanding of ultrasound imaging principles
  • Familiarity with axial resolution in medical imaging
  • Knowledge of beam softening effects in ultrasound
  • Experience with interpreting ultrasound phantoms
NEXT STEPS
  • Research the principles of ultrasound beam propagation
  • Study the impact of tissue density on ultrasound imaging
  • Learn about different types of ultrasound phantoms and their uses
  • Explore advanced techniques for improving ultrasound image quality
USEFUL FOR

Medical imaging professionals, ultrasound technicians, and researchers focused on enhancing ultrasound diagnostic techniques will benefit from this discussion.

BobP
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Hi
the image below taken from http://www.gammex.com/ace-files/manuals/411LE_Users_Guide.pdf

shows an ultrasound axial resolution phantom. I do not understand why the black dots on the phantom are stretched up-and-down in the ultrasound image. I do understand though why they get wider.

Please can someone explain why the dots get taller
Thank you
upload_2015-11-6_23-24-39.png
 
does it perhaps have anything to do with beam softening?
 

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