Mgray Technologies Secures Tens of Millions in Strategic Funding as Its Domestic Liquid Metal Bearing X-ray Tubes Enter Multiple Top-Tier Hospitals

Recently, an innovative enterprise specializing in core components for high-end medical imaging—Milligram TechnologyAnnounced the completion of a strategic financing round worth tens of millions of yuan. This round of financing was led byAnhui Tongchuang SME Technology Transfer Fund Partnership (Limited Partnership), Shenzhen Tongchuang Angel Phase II Private Venture Capital Investment Fund Partnership (Limited Partnership), Huzhou Nanhuixunying Venture Capital Investment Partnership (Limited Partnership), and Huzhou Nanxun Xunying Venture Capital Investment Partnership (Limited Partnership)Joint Investment. The funds raised will be used for the scaled mass production and capacity expansion of core products, R&D investment in next-generation technology platforms, recruitment of key talent, and the development of global market channels.

Previously, Milligram Technology has obtainedCowin Capital, Yuanming Capital, Suzhou Venture Capitalwith the support of several leading institutions, accumulating a total financing scale of nearly 100 million yuan, fully demonstrating the capital market's firm confidence in its technological strength and the prospects for the localization of core components for high-end medical imaging.

As a core component of high-end medical imaging systems, CT scanners rely heavily on their X-ray tubes, which directly determine image quality, radiation safety standards, operational stability, and maintenance costs. However, for many years, approximately 90% of the domestic CT X-ray tube market has been monopolized by international giants. This dominance has not only led to high procurement prices and long lead times but also posed potential supply chain security risks.

Guided by the national strategy of domestic substitution and supply chain self-reliance, and driven by huge market demand,Established in 2023, Milligram Technology takes technological innovation as its core driving force, precisely entering the “high-barrier, high-value” core track, and is committed to achieving and leading the localization of CT X-ray tubes.

Milligram Technology is headquartered in Suzhou High-Tech Zone, and isChina's First to Master the "Core Technology of High-Power Liquid Metal Bearing X-ray Tubes"The company’s founding and core team comprises senior experts from the world’s leading medical device companies, as well as from the fields of high-end vacuum devices and materials science. The team possesses a multidisciplinary background spanning cutting-edge R&D, precision manufacturing, and industrialization management.

Since its establishment, Milligram Technology has remained focused on the independent research and development (R&D) and industrialization of liquid metal bearing CT X-ray tubes. The company has accumulated extensive practical experience in core areas, including full-chain R&D, precision manufacturing, large-scale production, and rigorous validation. Leveraging its robust technological foundation, Milligram Technology has established end-to-end proprietary technical capabilities spanning from raw material R&D to system integration. It has successfully built China’s first R&D platform for liquid metal bearing CT X-ray tubes with independent intellectual property rights, striving to overcome critical bottlenecks in core CT components. This effort aims to achieve self-sufficiency and controllability in domestically produced high-end X-ray tube consumables and CT equipment, thereby breaking international monopolies.

As the "heart" of the entire CT system, the technical challenges of the CT X-ray tube are mainly concentrated in two aspects: first, how to withstand extremely high heat loads within an extremely small space; and second, how to maintain long-term stable mechanical performance at rotational speeds of tens of thousands of revolutions per minute. Traditional ball-bearing X-ray tubes are prone to wear, vibration, and failure under high heat and high rotational speeds, becoming a bottleneck that restricts tube lifespan and CT equipment performance.

Liquid metal bearing technology is widely recognized as the key pathway to addressing the aforementioned pain points, yet this field has long been monopolized by international giants. The technical challenges are primarily manifested in two aspects. First, gallium-indium-tin alloys, which are liquid at room temperature, are highly reactive and can react with most metals, undermining grain boundary cohesion and leading to material "pulverization" or embrittlement. This process is self-catalytic; once initiated, it accelerates continuously. The permeability into sealing surfaces is further exacerbated during the high-temperature operation of X-ray tube envelopes. Second, parameters such as groove design, helix angle, groove depth, and clearance ratio in liquid metal herringbone spiral bearings are extremely sensitive; even minute deviations can have a substantial impact on lubricity and load-bearing capacity.

SpaceSpin Liquid Metal Bearing (LMB) Technology, Image Source: Milligram Technology

In the face of these challenges, Milligram Technology’s independently developedSpaceSpin Liquid Metal Bearing (LMB) TechnologyReplacing steel balls with a liquid gallium-indium-tin alloy at ambient temperature, filled between the shaft and bushing, to upgrade rolling bearings into sliding bearings. This disruptive design has achieved three major breakthroughs:

Building on this foundation, the company integrated machining processes with the actual operating conditions of the X-ray tube envelope. Centering on the dual objectives of high load-bearing capacity and low void fraction, it meticulously optimized groove geometric parameters, distribution patterns, and hydrodynamic characteristics, thereby successfully overcoming core technical challenges related to bearing lubrication and load capacity.

AtOperational Stabilityaspect, the company's self-developedHigh-Bonding Anti-Fouling Film,It effectively prevents leakage under the harsh conditions of 1000°C cyclic thermal loads and 75G centrifugal force, and, combined with an integrated bearing-rotor design, eliminates leakage risks at the source. InSpeed Limitaspect, independently developedHigh-Load GroovePassed the rigorous 75G centrifugal force test, capable of stably supporting ultra-high-end CT gantry rotation speeds of 300 RPM.Service LifeIn terms of performance, validated by 5,000 hours of real-world operation, the X-ray tube achieves an ultra-long scanning lifespan of up to 1 million seconds, significantly reducing long-term operational and maintenance costs.

Furthermore, Milligram Technology has further optimized the X-ray tube'sCathode Module Design, thereby endowing it with ultra-high voltage resistance and providing a robust guarantee for high-power clinical scenarios. Meanwhile, thanks to the cathode electric field homogenization technology, the arcing rate during scan interruptions is reduced to an extremely low level, ensuring the stability and reliability of the equipment during continuous, high-throughput clinical scanning.

Based on this technology platform, Milligram Technology has launchedThe First High-End CT X-Ray Tube Product——Primus 40 Plus。

Primus 40 Plus, image source: Milligram Technology

Equipped with “SpaceSpin Liquid Metal Bearing Technology” and a “Uniform Field Strength Cathode Module,” this product effectively ensures high-speed rotational stability and an ultra-long service life under extreme operating conditions. Its proprietary SmartID technology, independently developed in-house, delivers industry-leading device compatibility. Furthermore, customized high-voltage testing and continuous scanning simulations have been conducted to further guarantee the utmost safety and reliability of the product in complex clinical environments.

Primus 40 Plus obtained its medical device registration certificate in late 2025. To date, it has been successfully installed and put into clinical use at numerous major hospitals across China, providing physicians and patients with more precise and efficient imaging diagnostic services.Currently, Milligram Technology has established strategic partnerships with several well-known domestic distributors and maintenance service providers to accelerate the clinical adoption of its products in medical institutions across China.

More importantly, SpaceSpin’s liquid metal bearing technology is merely the first step in Milligram Technology’s strategic layout, and the launch of Primus 40 Plus carries significance far beyond that of a single product.The company’s true objective is to complete its full transformation from a technological pioneer into a comprehensive provider of solutions for core components in medical imaging.

Following this round of strategic financing, Milligram Technology will prioritize scaled mass production in the near term, striving to achieve annual sales revenue exceeding RMB 100 million. Meanwhile, the company aims to establish in-depth partnerships with more mainstream CT system manufacturers and complete the R&D and regulatory registration of its new-generation high-performance X-ray tubes.

Looking ahead, the Company will consolidate its leading position in the domestic market amid the wave of localization of medical equipment in China, and gradually expand into overseas markets, striving to become a key global supplier of core CT components. Meanwhile, the Company will platformize its core technologies and extend their application to other high-end medical device sectors, such as Digital Subtraction Angiography (DSA). By continuously driving technological innovation, it will actively participate in and lead the formulation of industry standards, ultimately building a domestic industrial ecosystem for high-end medical components centered on the Company, so as to provide more reliable and accessible medical imaging solutions to patients worldwide.

Milligram Technology, established in 2023, is a high-tech enterprise dedicated to mastering core technologies for X-ray tubes used in high-end medical imaging, with a focus on the development and industrialization of liquid metal bearing X-ray tubes. As the developer of China’s first high-power liquid metal bearing X-ray tube with independent intellectual property rights, the company is committed to advancing the localization of core components, providing more efficient and durable Chinese-made solutions globally, and enabling broader access to the benefits of technological innovation.