What Medical Imaging Machines Need a Chiller

Medical imaging equipment continuously generates significant heat during operation. Whether it’s an MRI, CT, or PET system, overheating can lead to image distortion, shortened equipment lifespan, or even downtime. To avoid costly overheating, hospitals are turning to chillers to provide timely cooling for these devices.

MRI (Magnetic Resonance Imaging) Systems

MRI systems use superconducting magnets. These magnets must be kept at extremely low temperatures to maintain their superconducting properties. If the temperature rises even slightly, it could cause a loss in magnet functionality, leading to distorted images and system failure. A thermal chiller is essential for keeping the temperature stable and ensuring that the MRI machine works as intended.

CT (Computed Tomography) Scanners

CT scanners are widely used for taking detailed cross-sectional images of the body. The X-ray tubes in these machines generate significant heat, especially during long scanning sessions. If this heat isn’t dissipated fast enough, the tube life shortens and image artifacts appear.

A chiller keeps the X-ray tube oil or coolant loop within safe limits, often between 15°C and 30°C. In many CT suites, chillers are located in equipment rooms to reduce vibration and noise. Some hospitals even add secondary cooling circuits for high throughput facilities, where scanners operate almost non-stop throughout the day.

PET and SPECT Systems

PET and SPECT imaging rely on sensitive detectors that convert gamma rays into electrical signals. These detectors, along with associated amplifiers, generate heat that must be removed to prevent signal drift. Stable cooling is what ensures image uniformity and accurate quantification.

Chillers in PET systems typically maintain 5°C to 15°C temperature ranges with tight tolerance. When cooling is interrupted, detectors warm up unevenly, calibration drifts, and image data becomes unreliable.

Ultrasound Systems (High-Power Models)

Most ultrasound machines use natural convection or small fans. But for high-power or long-duration systems, such as 3D imaging or therapeutic ultrasound, air cooling isn’t enough. The transducers and amplifiers can overheat during extended scanning sessions. Overheating can damage the transducers or the power supply, leading to system failure or poor image quality.

Linear Accelerators and X-Ray Equipment

Linear accelerators are used in radiation therapy, while X-ray equipment is used for diagnosing a variety of conditions. Both of these systems produce a significant amount of heat during operation. Their RF power sources and target assemblies demand continuous cooling to maintain beam stability and patient safety.

How a Chiller Protects Medical Imaging Equipment

In medical imaging, temperature is invisible but critical. Every circuit board, magnet, and detector performs best within a narrow thermal range. A chiller keeps all of these parts in balance.

It circulates a temperature-controlled fluid through the system, absorbing heat where it forms and carrying it back to the condenser for release.

Without reliable cooling, systems slow down, drift, or shut off unexpectedly. With it, the equipment delivers clear, repeatable results for years.

Types of Chillers Used in Medical Imaging

What Medical Imaging Machines Need a Chiller - CT chiller（images 1）

What Medical Imaging Machines Need a Chiller - hospital cooling system（images 2）

Air-Cooled Chillers

These are the most common type used in hospitals. They transfer heat to the ambient air and are easy to install. Air-cooled chillers are ideal for smaller imaging centers or facilities without access to water supply lines. They require minimal maintenance and are typically quieter than you might expect.

Water-Cooled Chillers

Water-cooled units handle higher loads and are often used in large hospitals where multiple machines share a centralized cooling system. They provide excellent efficiency and maintain tighter temperature control. When space allows, they’re the preferred choice for continuous 24/7 operation.

Recirculating Chillers

Recirculating chillers are compact, self-contained units designed to cool one specific imaging system. They are perfect for ultrasound or PET applications where individual temperature control is critical. These units are easy to integrate and service, and they minimize cross-contamination between systems.

Low-Temperature Chillers

Some imaging technologies, especially superconducting MRI systems, require ultra-low coolant temperatures. Low-temperature chillers deliver precise cooling even below freezing, often using specialized fluids and multi-stage refrigeration designs. Their stability ensures that critical components stay within exact specifications.

LNEYA Medical Cooling Solutions

LNEYA has customized chillers of various types and performance levels for numerous hospitals and biological research institutes. Whatever equipment you need cooled, we can provide you with a reliable cooling system.

Let us know your requirements