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ULTRASOUND-AXIAL RESOLUTION

Physics

ULTRASOUND-AXIAL RESOLUTION

1. Resolution - the ability to discriminate between 2 points that are close to each other.

2. Axila resolution - the minimum distance between two reflectors along the axis of the beam that can result in two distinguishable echoes. AKA depth resolution.

3. Better than lateral resolution, hence tissue should be scanned at perpendicular angles.

4. The axial resolution is about half the pulse length.

5. High frequency = high axial resolution (due to high attenuation), but note that penetration (cm) = 40 / frequency (MHz).


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REFERENCES

1. Bushberg, J. T. (2012). The essential physics of medical imaging. Philadelphia: Wolters Kluwer Health/Lippincott Williams & Wilkins. Find it at Amazon
2. Heggie, J. C., Liddell, N. A., & Maher, K. P. (1997). Applied imaging technology. Melbourne: St. Vincents Hospital.

Ⓒ A. Manickam 2018

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