Intended Use

Velacur is intended to provide estimates of tissue stiffness generated from shear wave speed measurements (40-70Hz) and coefficient of attenuation to non-invasively determine liver tissue stiffness and attenuation, assisting clinical management of patients with liver disease.

Technology

Velacur uses a vibration activation unit placed under the patient to generate shear waves in the liver, while an ultrasound transducer acquires volumetric scans over the intercostal space. Two deep learning-based algorithms perform liver segmentation and shear wave quality assessment to improve data acquisition for elasticity and attenuation calculation.

Performance

Performance was validated with non-clinical bench testing including phantom tests and volunteer studies, plus clinical testing on patients with liver disease using novice operators. AI algorithms for liver segmentation and shear wave quality were tested on large datasets from US and Canada with performance metrics such as Dice coefficient >0.7 and accuracy >80%, confirmed by expert truthing.

Predicate Devices

No predicate devices specified

Device Timeline

  • 1

    Submission

    10/25/2022

    5 months
  • 2

    FDA Approval

    4/20/2023

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