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Related Experiment Video

Updated: Jul 7, 2026

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

X-ray Dose Reduction through Adaptive Exposure in Fluoroscopic Imaging

Published on: September 11, 2011

Power spectrum equalization for ultrasonic image restoration.

D Iraca¹, L Landini, L Verrazzani

¹Inst. of Electron and Telecommun., Pisa Univ.

IEEE Transactions on Ultrasonics, Ferroelectrics, and Frequency Control

|January 1, 1989

Summary

This study introduces a novel method for ultrasonic B-scan image restoration, enhancing image resolution without needing prior system knowledge. The technique estimates the imaging system

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Contrast-Enhanced Subharmonic Aided Pressure Estimation (SHAPE) Using Ultrasound Imaging with a Focus on Identifying Portal Hypertension

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Published on: December 5, 2020

Area of Science:

Medical Imaging
Ultrasound Technology
Image Processing

Background:

Ultrasonic B-scan images often suffer from low resolution due to system limitations.
Existing image restoration methods typically require prior knowledge of the imaging system's point spread function (PSF).
In vivo applications are challenging due to dynamic system variations and unknown parameters.

Purpose of the Study:

To develop an image restoration method for ultrasonic B-scan images that does not require a priori knowledge of the point spread function (PSF).
To enable feasible in vivo ultrasonic image restoration.
To significantly improve the resolution of ultrasonic images.

Main Methods:

A novel method to estimate the entire system's response, including the PSF, directly from the degraded ultrasonic image using simple operations.
Image restoration is performed using the estimated PSF and spectral characteristics of the echo signal.
A phaseless restoration filter is employed to preserve phase relations between echoes, avoiding nonlinear detection.

Main Results:

The proposed method successfully restored simulated ultrasonic images with and without interposed tissue, demonstrating improved resolution.
Experimental validation on a phantom with varying attenuation confirmed the effectiveness of the restoration filter.
Both simulations and experiments showed exceptional improvements in image resolution.

Conclusions:

The developed method provides effective ultrasonic B-scan image restoration without prior system knowledge.
The technique is suitable for in vivo applications, offering enhanced image resolution.
The phaseless filter preserves crucial phase information, leading to superior restoration quality.