Ultrasound elastography using a regularized modified error in constitutive equations (MECE) approach: a comprehensive...

Area of Science:

• Medical Imaging
• Biomedical Engineering
• Quantitative Elastography

Background:

• Current transient elastography techniques, like shear wave elastography (SWE), rely on assumptions of planar shear wave propagation that are often violated in vivo.
• Violated assumptions in SWE can lead to image artifacts and inaccurate reconstruction of tissue elastic properties.

Purpose of the Study:

• To demonstrate the superiority of the modified error in constitutive equations (MECE) formulation with total variation regularization (MECE + TV) over conventional SWE.
• To evaluate the performance of MECE + TV in reconstructing elastic moduli and specific phantom features relevant to clinical applications.

Main Methods:

• Experiments were conducted using tissue-mimicking phantoms with inclusions of defined shapes.
• The performance of MECE + TV was quantitatively compared against SWE using metrics such as reconstruction accuracy, shape recovery, edge preservation, size representation, and elasticity/contrast accuracies.

Main Results:

• The MECE + TV approach demonstrated superior performance compared to SWE across multiple quantitative metrics.
• Specific improvements were observed in reconstruction accuracy, shape recovery, edge sharpness, and elasticity/contrast accuracies.

Conclusions:

• The MECE + TV method offers significant advantages over conventional SWE for reconstructing elastic moduli.
• Further development of MECE + TV holds potential for superior elastography reconstructions in clinical settings.