![Hemosonics-Hero-mobile-blood-dials](https://hemosonics.com/wp-content/uploads/hemosonics-hero-mobile-blood-dials-450x240-1.jpg)
Sonic Estimation of Elasticity via Resonance (SEER)
The Quantra® System is based on a patented technology called SEER (Sonic Estimation of Elasticity via Resonance) Sonorheometry.
SEER uses state-of-the-art ultrasound technology to measure clot stiffness (shear modulus of elasticity) over time using ultrasound-induced resonance.
![Hemosonics-Technology-diagram-data-acquisition](https://hemosonics.com/wp-content/uploads/technology-diagram-data-acquisition.png)
Data Acquisition
Ultrasound pulses are sent into the blood sample to induce resonance, causing the sample to oscillate.
![Hemosonics-Technology-diagram-displacement-estimation](https://hemosonics.com/wp-content/uploads/technology-diagram-displacement-estimation.png)
Displacement Estimation
As the blood coagulates over time and its stiffness increases, the frequency of oscillation will also increase.
![Hemosonics-Technology-diagram-modulus-estimation](https://hemosonics.com/wp-content/uploads/technology-diagram-modulus-estimation.png)
Clot Time and Clot Stiffness Measurement
Clot times and clot stiffness values are measured from the evolving shear modulus.
Watch Quantra in Action
Benefits of SEER Sonorheometry
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Innovative Technology
SEER (Ultrasound)
No disruption of clots during measurement
- Robust to vibration
- Sensitive to soft clots
- Closed system
![Hemosonics-Icon-bar-chart](https://hemosonics.com/wp-content/uploads/icon-bar-chart.png)
Accurate Measurement Method
Shear Modulus (hPa)
True measure of mechanical properties; Accurate assessment of platelet and fibrinogen contribution to clot stiffness
- Accurate results
- Novel information
![Hemosonics-Quantra-icon](https://hemosonics.com/wp-content/uploads/quantra-icon.png)
Innovative Design
Comprehensive, automatic internal QC; Designed for the POC; Fully automated
- Reliable results
- Excellent precision
- Small footprint
![Hemosonics-Quantra-icon](https://hemosonics.com/wp-content/uploads/quantra-icon-1.png)
Explore the System
Learn more about the features of our next-gen device designed for the POC and how it empowers clinicians to quickly assess coagulation characteristics.
![Hemosonics-Icon-explore](https://hemosonics.com/wp-content/uploads/icon-explore.png)
Explore Scientific Publications
See articles on clinical studies and sonorheometry as well as the full list of guidelines calling for point-of-care coagulation analysis.