What Is The MRI Cryocooler?

The MRI cryocooler, commonly known as cold head, is an irreplaceable core component of superconducting MRI cooling systems. Different from ordinary medical equipment parts, it undertakes the key task of maintaining the ultra-low operating temperature of superconducting magnets. Superconducting magnets can only form stable and uniform magnetic fields under extreme low-temperature environments. Without continuous heat absorption by cryocoolers, liquid helium inside the magnet will evaporate rapidly, and even trigger magnet quench, which will cause millions of economic losses and long-term suspension of clinical scanning.

The mainstream cryocoolers used in global hospitals are Sumitomo GM cryocoolers, covering mature models including RDK-408A3, RDK-408C3, RDK-408L3, RDK-412D4 and supporting HC-8E helium compressors, original helium pipelines and other matching accessories. As a typical wearing part, cryocoolers will gradually lose cooling capacity after years of non-stop operation, resulting in fluctuating magnetic field uniformity, fuzzy scanning images and frequent equipment alarms.

At present, medical imaging equipment covers mainstream brands such as Siemens, GE, Philips, Toshiba and United Imaging, all of which rely on matching cryocoolers to operate normally. However, original manufacturers have long delivery cycles and insufficient spot inventory, which brings great troubles to hospitals and third-party maintenance companies.

Shanghai Maiger International Trading Co., Ltd. has built a complete MR spare parts warehouse with more than 4,000 types of magnetic resonance accessories in stock, including full-series brand-new Sumitomo cryocoolers. All cryocoolers will go through low-temperature performance test, vacuum tightness detection and continuous operation aging test on professional MRI test platforms before storage, fully meeting international medical device quality standards. Understanding the core function and working principle of MRI cryocoolers helps medical maintenance practitioners judge equipment faults in advance, prepare spare parts reasonably, and avoid long-term shutdown of high-value MRI equipment.