VCTE is a proprietary elastography technology developed by Echosens. VCTE allows for measurement of tissue elasticity with quantitative, reproducible, real time results expressed in kPa (kiloPascal) and is a standard recognized by hepatologists and validated by a large number of publications.
Echosens adapted transient elastography to medical application by introducing a variety of new features. The improved technique is called Vibration-Controlled Transient Elastography (VCTE). The proper use of shear wave velocity analysis for clinical diagnosis requires the control of various physical parameters to ensure an accurate, reliable, and reproducible assessment of tissue stiffness.
These include the control of vibration frequency, energy intensity, applied force and astandardized algorithm. These important controls ensure that the shear wave, which is the ultimate source of stiffness information, is properly induced in the medium.
CAP, A tool for non invasive
assessment and quantification of steatosis.
What is the CAp?
CAP is a measure of the ultrasound attenuation which corresponds to the decrease in amplitude of ultrasound waves as they propagate through the liver. CAP is powered by a sophisticated guidance process based on VCTE that ensures that:
-CAP and liver stiffness are simultaneously measured in the same liver volume
-CAP is calculated only if liver stiffness measurement is valid CAP is measured with the M probe at 3.5 MHz at depth between 25 and 65 mm CAP is expressed in decibel per meter (dB/m)
-CAP is calculated only if liver stiffness measurement is valid CAP is measured with the XL probe at 3.5 MHz at depth between 35 and 75 mm CAP is expressed in decibel per meter (dB/m)
Like for liver stiffness measurement with the FibroScan, CAP measurement:
-is non invasive
-is immediate: does not lengthen the FibroScan examination
-benefits from an established examination procedure: the final CAP result is the median of at least 10 valid CAP measurements
-can be performed by an operator without any ultrasound imaging skills