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Can Accurate Shear Wave Velocities Be Obtained in Kidneys?
1Northeastern Ohio Medical University, Rootstown, Ohio, USA.
Summary
Shear wave elastography of the kidney is likely inaccurate with current ultrasound systems. New software shows promise, but further studies are needed to confirm accurate renal shear wave speed measurements.
Area of Science:
- Medical imaging
- Ultrasound technology
- Renal diagnostics
Background:
- Conflicting literature exists regarding the accuracy of kidney shear wave elastography for disease assessment.
- Renal stiffness values are being investigated for their relation to kidney disease processes.
- Accurate measurement of renal shear wave speed is crucial for reliable elastographic studies.
Purpose of the Study:
- To evaluate raw data from three ultrasound systems for kidney shear wave elastography.
- To determine if adequate displacement curves are obtained for accurate shear wave speed estimation.
- To assess the reliability of current renal elastography techniques.
Main Methods:
- Shear wave elastography was performed on 5 healthy volunteers using three different ultrasound systems.
- Raw data were collected and analyzed for shear wave propagation quality.
- The ability to accurately estimate renal shear wave speeds was evaluated.
Main Results:
- Existing ultrasound systems (as of June 2018) do not consistently obtain accurate shear wave displacement curves for renal elastography.
- One vendor has introduced new software that shows potential for acquiring accurate shear wave displacements.
- The raw data analysis revealed limitations in current renal elastography methods.
Conclusions:
- Current elastographic studies of the kidney are likely inaccurate due to technical limitations.
- A new algorithm has been developed that appears to acquire accurate shear wave displacements in the kidney.
- Further research is necessary to validate the clinical accuracy of the new algorithm and confirm reliable renal stiffness measurements.
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