SIUI
A Chinese medical-imaging and industrial non-destructive-testing brand operated by Shantou Institute of Ultrasonic Instruments Co., Ltd.
Last updated October 9, 2026
AI crawler reads
No AI crawler has read this profile since Oct 28, 2026.
Overview
SIUI is the brand of Shantou Institute of Ultrasonic Instruments Co., Ltd., a Chinese manufacturer focused on diagnostic ultrasound, medical imaging and industrial non-destructive testing. The company is associated with Shantou, Guangdong, and is described in reference material as one of China's largest and longest-established ultrasound manufacturing bases. Its business combines medical technology with industrial inspection equipment, giving the brand a broader scope than a conventional clinical-ultrasound specialist. The company's ultrasound activities span several generations of technology. Its development path is commonly described as progressing from A-mode ultrasound to B-mode imaging, color Doppler, real-time three-dimensional and four-dimensional imaging, and elastography. This progression reflects the wider evolution of diagnostic ultrasound from basic signal display toward dynamic anatomical imaging and tissue-characterization applications. SIUI reportedly produced its first color Doppler system, the Apogee 800, in 1997. In 2008, it developed real-time 3D/4D ultrasound technology and introduced a related family of color Doppler systems. SIUI's medical portfolio includes black-and-white ultrasound systems, color Doppler systems, volume-imaging and 4D equipment, accessories and veterinary ultrasound products. Its stated customer applications cover human healthcare as well as veterinary practice. The company's broader medical-imaging activities also include medical X-ray products, making its portfolio extend beyond ultrasound while remaining centered on diagnostic imaging. A separate non-destructive-testing division supplies equipment used to inspect materials, welds, structures and manufactured components without damaging them. Products include phased-array ultrasonic flaw detectors, conventional ultrasonic flaw detectors, thickness gauges, probes and associated accessories. The target sectors listed for these products include machinery, metallurgy, railways, shipbuilding, aircraft and construction. SIUI's participation in professional non-destructive-testing organizations in China, the United States, Japan and the United Kingdom indicates an effort to maintain international technical links in this field. The company has facilities in and around Shantou and maintains more than 20 offices in China and overseas according to the referenced encyclopedia material. Its products have been associated with ISO 9001 quality certification, European CE marking and U.S. Food and Drug Administration regulatory clearance or registration; the precise scope and current status of individual certifications are not specified in the available material. SIUI therefore presents itself as an engineering-led Chinese imaging and inspection brand with domestic roots, international distribution and a product base spanning clinical diagnosis, veterinary care and industrial quality control.
History
SIUI is the commercial identity associated with Shantou Institute of Ultrasonic Instruments Co., Ltd. The available reference material does not provide a verified founding date, founder, ownership history or detailed chronology of the company's corporate development. It does, however, characterize SIUI as a major Chinese ultrasound manufacturing base with a long history in the domestic industry. The company's technology history is presented as a sequence of five stages, identified as A through E. The first stage involved A-mode ultrasound equipment, an early form of ultrasonic measurement based on displaying echoes along a single dimension. SIUI then moved into B-mode ultrasound imaging, which enabled two-dimensional grayscale representations and became a foundation of modern diagnostic sonography. The next major transition was color Doppler, adding visualization of blood flow to structural ultrasound imaging. SIUI is reported to have manufactured its first color Doppler system, the Apogee 800, in 1997. The fourth stage concerned real-time three-dimensional and four-dimensional ultrasound. In 2008, SIUI reportedly developed real-time 3D/4D technology and released a series of real-time 3D/4D color Doppler systems. These products extended the company's imaging capabilities from planar examination toward volumetric visualization and moving three-dimensional displays. The fifth stage is elastography, a group of techniques that assess tissue stiffness and can provide information complementary to conventional ultrasound imaging. SIUI's business subsequently developed across several product divisions. Its ultrasound division manufactures black-and-white systems, color Doppler systems, volume-imaging and 4D products, veterinary ultrasound equipment and related accessories. The company also has a medical X-ray imaging division, broadening its healthcare offering beyond ultrasound. A separate non-destructive-testing division supplies ultrasonic inspection instruments for industrial customers. Its products include phased-array flaw detectors, conventional flaw detectors, thickness gauges, probes and accessories used in sectors such as machinery, metallurgy, railway transportation, shipbuilding, aviation and construction. The combination of medical and industrial ultrasound reflects the shared technical basis of acoustic inspection while addressing different regulatory, application and purchasing environments. Clinical products are intended for diagnostic imaging in human and veterinary care, whereas industrial instruments are used to identify defects, measure thickness and assess the integrity of materials or structures without destructive sampling. The reference material states that SIUI has facilities in and around Shantou and maintains more than 20 offices in China and other countries. It also identifies ISO 9001 certification, European CE marking and U.S. FDA-related market access among the company's quality and regulatory credentials, without specifying the exact certificates, product registrations or dates. SIUI's professional affiliations include the American Society for Nondestructive Testing, the Chinese Society of NDT, JSNDI and the British Institute of Non-Destructive Testing. These affiliations support the image of a manufacturer seeking participation in international technical and standards communities. The available sources do not establish a precise current revenue scale, employee count, ownership structure, executive roster or complete international subsidiary network. Consequently, SIUI's documented history is strongest in relation to its ultrasound technology progression, product diversification and industrial inspection activities rather than its corporate milestones.
- 2008
Development of real-time 3D/4D ultrasound
[1]SIUI reportedly developed real-time 3D/4D ultrasound technology and released a series of real-time 3D/4D color Doppler systems.
- 1997
First Apogee 800 color Doppler system
[1]SIUI reportedly manufactured its first color Doppler ultrasound system, the Apogee 800, marking a transition from earlier ultrasound modes toward integrated blood-flow imaging.
Products and positioning
An integrated Chinese imaging and inspection-equipment manufacturer serving healthcare, veterinary medicine and industrial non-destructive testing.
Medical ultrasound
Black-and-white ultrasound systems
Ultrasound systems producing conventional grayscale diagnostic images. These systems represent a foundational part of SIUI's medical-imaging portfolio and are intended for routine clinical examinations where two-dimensional anatomical visualization is required.
Medical ultrasound · 1997
Color Doppler ultrasound systems
Diagnostic ultrasound systems combining structural imaging with Doppler assessment of blood flow. SIUI's color-Doppler development is associated with the Apogee 800, reported as the company's first system in this category in 1997.
Medical ultrasound · 2008
Real-time 3D/4D ultrasound systems
Volumetric ultrasound systems that produce real-time three-dimensional imagery and moving 3D displays commonly described as 4D imaging. SIUI introduced a series of real-time 3D/4D color Doppler systems after its reported 2008 technology development.
Veterinary imaging
Veterinary ultrasound products
Ultrasound systems and accessories designed for veterinary applications. The available material identifies veterinary imaging as a distinct part of SIUI's ultrasound product scope but does not provide model-level details.
Medical imaging
Medical X-ray imaging products
Medical X-ray imaging equipment supplied through SIUI's medical-imaging activities. The reference material confirms this as a product category but does not specify individual systems, applications or launch dates.
Industrial non-destructive testing
Phased-array ultrasonic flaw detectors
Industrial ultrasonic inspection instruments using phased-array techniques to examine materials and components for internal defects. The products are positioned for demanding applications across sectors including railways, shipbuilding, aviation, metallurgy and construction.
Industrial non-destructive testing
Conventional ultrasonic flaw detectors and thickness gauges
Portable or field-oriented ultrasonic instruments for detecting flaws and measuring material thickness without cutting or damaging the inspected object. SIUI lists these products alongside probes and accessories within its non-destructive-testing division.
Sources1 sources
Cite this profile: Cite the canonical profile. /brand-wiki/siui · Editorial policy · How profiles are compiled