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Multi-gate Doppler and 3D Spectrum Display

Introduction
Multi-gate Doppler is a patented Saset technology that
offers visualization of the velocity profile in the
velocity/depth plane and of the 3D spectrum with the
additional axis of axial depth.
The result offers never-before-seen information
regarding the hemodynamics of vessels, and
significantly improves the accuracy of volume flow
estimation.

Method
The method subdivides the axial gate into multiple
smaller sub-gates. Spectrum is computed for each subgate,
and the resulting velocity distribution may be
plotted in the velocity/axial distance axis as a velocity
profile. Additionally, the full 3D data, consisting of
velocity, time, and depth axes, is displayed.
As an example of the clinical significance, the central
collapse of the velocity profile after systole is related to
the elasticity of the vessel wall.

Improved volume flow estimation
The Doppler gate is widened to the entirety of the
vessel. By assuming radial symmetry, the volume flow
can be estimated from the numerous sub-gates.
This is an improvement over conventional single-gate
Doppler which assumes the velocity distribution is
laminar over the entirety of the gate, which is clearly
false.
We verify the increase in accuracy by flow phantom
experiments, using both conventional and multi-gate
Doppler to estimate volume flow.

State (Beijing) Medical Technology Co., Ltd. established in 2002, is a High-tech medical products enterprise combining R&D, production ,sales and after-sale together, specialized in Medical Ultrasonic Instruments, ENT Workstation, Medical Endoscope Imaging Systems, Colposcope, Spectral Instrument for gynecology, Plasma Air Disinfection Machine, X-ray machines and etc. We constantly develop high-quality electric medical devices by adopting the domestic advanced technical facilities to blend the computer information process technology and clinical medicine research perfectly.

With advanced ultrasonic technology, high-standard quality system, strict production process control and efficient after-sales service, our medical ultrasound products has obtained the trust of many medical institutions, such as Colour Doppler ,Digital B/W Ultrasound, Wireless Mini Ultrasound Scanner. Our Colour Doppler is the advanced scientific research achievement of State, which is the reflection that State has been taking customer's demand as design concept and making excellent technology innovation as backup force whether from scalable structure or high-quality images and powerful clinical application. State supply cost-effective and best image colour ultrasounds to global medical communities and make ultrasonic diagnosis enter into a new level. State has got good social and economic benefits because it pays attention to develop new technology and products, train and introduce high-quality talents.

State has first passed the ISO 13485 certificate and the Quality System Certification of ISO9001 as early as 2004 among the same industry in China. The ISO14001 environmental management system certification and ISO 18001 occupational health and safety management system certification has been obtained in 2012. By the end of 2016, three products of our factory have passed the European CE certification. So far, we have 4 computer software copyrights, 2 invention patents, 18 practical and new patents. We always put "quality-oriented, customer the first" as our tenet and stick to the belief "high-standard product, excellent service". We will explore and develop unceasingly and try to make outstanding contributions to human health in the world, which is the common goal of every State people.