Ring artifacts removal in X-ray-induced acoustic computed tomography.

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Acoustic Physics

Background:

• X-ray-induced acoustic computed tomography (XACT) is a hybrid imaging technique using X-ray absorption and ultrasound emission.
• Single-projection X-ray illumination in XACT reduces radiation exposure and increases imaging speed.
• Ring artifacts degrade XACT image quality due to nonuniform detector response in multichannel acquisition systems.

Purpose of the Study:

• To develop and validate model-based algorithms for correcting ring artifacts in XACT imaging.
• To improve the image quality and diagnostic reliability of XACT.

Main Methods:

• Proposed model-based algorithms to address nonuniform detector response and multichannel data acquisition interference.
• Applied algorithms to numerical simulations and experimental measurements for artifact correction.
• Compared corrected XACT images with conventional reconstructions.

Main Results:

• Successfully reduced ring artifacts in XACT images using the proposed algorithms.
• Demonstrated significant artifact reduction compared to conventional methods.
• Validated algorithm efficacy on both simulated and real-world data.

Conclusions:

• Model-based algorithms effectively correct ring artifacts in XACT imaging.
• The developed methods enhance XACT image quality, overcoming limitations of current techniques.
• This advancement holds promise for more accurate and reliable XACT-based diagnostics.