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Ultrasonography

Ultrasonography

Ultrasonography is an imaging technique that uses high-frequency sound waves to visualize the body's internal structures. It is a non-invasive and safe procedure that does not involve the use of ionizing radiation, making it widely used in various medical fields. Ultrasonography is used to study heart function, blood flow in the neck or extremities, certain conditions such as gallbladder disease, and fetal growth and development.
During an ultrasonography procedure, a handheld device called...

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Evaluating Targeting Accuracy in the Focal Plane for an Ultrasound-guided High-intensity Focused Ultrasound Phased-array System

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A phase aberration correction method for ultrasound imaging.

M Karaman¹, A Atalar, H Koymen

¹Dept. of Electr. and Electron. Eng., Bilkent Univ., Ankara.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1993

Summary

This study introduces an efficient computational method for phase aberration correction in ultrasound imaging. The technique improves image quality by minimizing signal distortions caused by tissue variations.

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Area of Science:

Medical Imaging
Biomedical Engineering
Signal Processing

Background:

Ultrasound imaging is crucial for medical diagnostics.
Phase aberrations degrade ultrasound image quality.
Accurate aberration correction is needed for enhanced diagnostic capabilities.

Purpose of the Study:

To develop and evaluate a computationally efficient method for phase aberration correction in ultrasound imaging.
To analyze the impact of averaging and wordlength truncation on correction performance.
To assess the method's effectiveness using simulations and experimental data.

Main Methods:

A novel time delay estimation technique minimizing the sum of absolute differences between adjacent radio frequency samples.
Simulation of phase distortions using silicone rubber aberrators.
Examination of averaging aberration patterns over scan angle and single-bit wordlength truncation.
Performance evaluation using experimental ultrasound data and standard resolution phantoms.

Main Results:

The proposed method demonstrates computational efficiency for phase aberration correction.
Averaging and wordlength truncation effects were quantified.
Simulations and experimental results validate the method's performance in correcting phase distortions.
Reconstructed images showed improved quality after aberration correction.

Conclusions:

The presented method offers an efficient approach to phase aberration correction in ultrasound.
The findings provide insights into optimizing correction parameters for improved ultrasound image fidelity.
This technique has the potential to enhance diagnostic accuracy in ultrasound imaging.