LinkQuest Inc. is an innovative American high-tech company with more than 19 years of successful operating history in San Diego, California. Two of LinkQuest's co-founders hold Ph.D. degrees in Electrical Engineering and Computer Sciences from the prestigious University of California at Berkeley ( and have led the company in successful research, development, production and marketing of many types of highly sophisticated precision electronic instruments over years. Our highly capable engineering staff, of which more than 10 hold Ph.D. degrees, has many years of in-depth industrial and academic experiences in various related technical areas. LinkQuest Inc. has been a leading manufacturer of precision acoustic instruments (Sonars), and its products are sold to more than 75 countries. More information can be found at For the last several years, LinkQuest Inc. has been heavily investing in the independent development of new generations of advanced full function diagnostic ultrasound imaging systems, the SQ860 General Diagnostic Ultrasound System and the SQ810 OEM Ultrasound Imaging System. The SQ860 General Diagnostic Ultrasound System was approved by FDA in 2017.  LinkQuest Inc. owns complete intellectual properties of all technologies contained in these systems. The SQ860 General Diagnostic Ultrasound System and SQ810 OEM Diagnostic Ultrasound System, with Superior Performance and High Quality at an Affordable Price, are completely designed and produced in the company's factory in San Diego, California, USA with pride.


SQ860 General Ultrasound Imaging System
SQ810 OEM Ultrasound Imaging System
Linear Probe Carotid Color Image

Price (Including one linear probe and one convex probe):


Price is F.O.B. San Diego, California and for US domestic end customers only. International prices vary.

New and Made in San Diego, California, USA.


3 Years (System) / 1 Year (Probes)

Premium Image Quality

SQ860/SQ810 ultrasound imaging systems provide premium quality diagnostic images in 2D, 3D/4D, various Doppler and all other commonly used imaging modes. These high quality ultrasound images are constructed by LinkQuest's highly advanced Expanded Multi-Beam Infrastructure which is based on cutting-edge high capacity electronics and advanced modern algorithms. The highly sophisticated Multi-Feature Classification imaging processing greatly improves image qualities by separately performing various advanced image processing algorithms for many different kinds of general and specific image features in the original images. It can be flexibly and precisely adjusted to generate optimal images for specific application requirements. The system provides several different imaging styles (different in smoothness and enhancement) for customers to choose from, and it can also be customized by customers. The system's functionality can be improved and later upgraded by system software upgrade.

Full Advanced Functionalities and Operation Modes

SQ860/SQ810 general ultrasound imaging systems provide all commonly used advanced diagnostic imaging modes. It includes various 2D, panoramic 2D, free-hand 3D, 4D, living color 3D/4D, Tissue Harmonic Imaging, various color, power and spectrum Doppler, CW, Tissue Doppler Imaging, Elastography etc.

Ease of Operation

SQ860/SQ810 general ultrasound imaging systems provide multiple ease of operation features to simplify repeated scan operations and improve ergonomics, thereby maximizing productivity, reducing operator's working stress, and resulting in logical and efficient workflows. Multiple push, rotary and rocker input control devices dedicated to individual specific frequently used functions combining function select and adjust into a single operation, and arranged in the close range of the control hand, reducing the arm's reach during operation. Multiple customizable control buttons for operator's specific need. Intuitive touch screen providing direct access to advanced modes and features. One-touch optimization saving time and automatically optimizing image quality. Customizable presets simplifying repeated scan protocols and maximizing productivity. SQ860's large 19" main monitor with fully adjustable articulating arm and rotary compact control panel is easily adjustable to suit each individual operator. Compact light mobile system design and full range of imaging functionality make it ideal for multi-place shared-service applications.

Off-Line Image Analysis

The original image data can be saved for later analysis. The 3D/4D image data can be uploaded and re-rotated in space, re-cut in any plane, re-edited, and re-processed in many other ways. The 2D/Doppler image data can be uploaded and re-adjusted by using appropriate imaging processing functions to optimally improve certain specific image features that are most important for the particular diagnostic application.

OEM Ultrasound Imaging System

SQ810 OEM Ultrasound Imaging System is a perfect platform for building various kinds of general or special ultrasound imaging systems, providing our customers a shortcut in developing advanced ultrasound imaging system products. Based on the most advanced hardware, firmware, software and algorithms, the SQ810 OEM Ultrasound Imaging System provides premium imaging quality, full range of advanced functions and compact size. Any part of the system can be modified by LinkQuest Inc. according to the customer's special application requirements, such as working frequency (1.5MHz - 20MHz), special probes, special imaging processing, and various special imaging modes.

Probes (Transducers)

Linear, Convex, Endocavity, Phased Array and 4D Convex

Specifications (* is for SQ860 only)

  • 19" LCD Monitor on fully adjustable articulating arm independent of Control panel*
  • Control panel with integrated 10" touch screen (rotates independent of LCD Monitor*)
  • One-touch optimization, saving time and automatically optimizing image quality
  • User-defined presets
  • User-defined control buttons
  • B Mode
  • M Mode
  • Pulse Inversion Tissue Harmonic Imaging
  • Spatial Compounding
  • Panoramic View Imaging
  • Trapezoidal/2D-Steering Imaging
  • Sector Imaging
  • EPI - Extended Pulse Imaging
  • Color Doppler
  • Pulsed Wave Doppler
  • Power Doppler
  • Tissue Doppler Imaging
  • CW Doppler
  • Elastography
  • Freehand 3D
  • Real-time 4D
  • Living color 3D/4D imaging
  • USB Ports

Clinical Applications

  • Fetal
  • Abdominal
  • Pediatric
  • Small Organ
  • Neonatal Cephalic
  • Adult Cephalic
  • Cardiac
  • Transcranial
  • Transrectal
  • Transvaginal
  • Peripheral Vascular
  • MSK
  • Vascular Access
  • Nerve Block

Contact Us

6749 Top Gun Street, San Diego, CA 92121, USA

Tel: (858) 623-9900, (858) 623-9916, (858) 623-9919

Fax: (858) 623-9918

Sales: Support:

Trade Shows

JULY 17-19, 2018
Orange County Convention Center, Orlando, Florida

CMEF 2015
May 15 - 18, 2015
Booth H6.2 - V05
National Convention and Exhibition Center
Shanghai, China


Linear Probe Thyroid Image
Endocavity Probe Thyroid Image
Convex Probe Liver Image
Phased Array Heart Image
Phased Array Heart Color Image
Phased Array Probe Heart CW Image
Convex Probe Kidney Vascular Color Image 
Linear Probe Thyroid Panoramic Image
Linear Probe Thyroid PW Doppler Image
Phased Array Heart Tissue Doppler Color Image
4D Convex Real Time Living Color Fetus Image
Linear Probe Elastography Phantom Image
Convex Probe Aorta and Vena Cava Color Image
Convex Probe Liver Small Vascular Color Image
Phased Array Heart Color Image
Linear Probe Thyroid Color Image
Endocavity Probe Kidney Vascular Color Image

How to Further Evaluate the SQ860 System

  • Request LinkQuest to email you additional images and videos other than the ones shown at this web site.
  • Visit LinkQuest at various trade shows.
  • Attend training and evaluation classes at LinkQuest’s facility in San Diego, California.
  • Two types of classes are offered:     
  • 1) A short class that lasts for one day and includes a two-hour training session on how to operate the SQ860 system and a 6-hour practice session done by the client.
  • 2) The longer class lasts for two days and includes a two-hour training session on how to operate the SQ860 system, a 6-hour practice session in the first day, and an 8-hour session in the second day done by the client.
  •  Senior LinkQuest engineering staff will be available to answer all technical and operational questions in the classes.
  •  Classes are free of charge.
  •  Clients pay for their own traveling expenses