Medical Imaging

Medical imaging systems provide detailed images on the structure of a body in multiple topographies. Detailed contrasts are visible between the different soft tissues and are useful in neurological,

cardiovascular and oncological imaging. There are three main types of imaging systems:  CT Scan, PET Scan and MRI. CT and PET scanners use ion radiation created by X-rays to capture topographical images and MRIs use magnetic and radio frequency fields. Liquid cooling systems (LCS) allow for optimal temperature stabilization for more precise temperature control in these types of medical imaging systems.

Liquid Cooling Systems

LCS from Laird Thermal Systems are able to dissipate the large amount of heat generated in the densely packed electronic environment of imaging systems. LCS offer higher efficiency than air-based heat exchangers, and provide more rapid cooling and higher reliability. Compact liquid cooling systems offer a high coefficient of performance (COP) that ensures efficient, low power operation to maximize uptime and optimize performance. In addition, the standard and custom LCS delivers quiet operation in a smaller and lighter system.

Custom Liquid Cooling Systems

Given the complexity of medical imaging systems, the use of a custom designed LCS with plug-and-play components may be a good solution. For example, quick connect fittings to allow easy service and maintenance, such as a bottom drain for removing the coolant by gravity, or a pump that is easy to swap out if necessary, add to the system’s ease-of-use. Custom housing configurations for unique environments may be required. Laird Thermal Systems has the knowledge to custom design liquid cooling systems for medical imaging applications, as well as the expertise to support and service them.
Read More: PET/SPECT application note

Cooling Particle Accelerators

Particle accelerators are used to increase the kinetic energy of particles. Linear Accelerators and Cyclotrons are two different types of particle accelerators that can be found in various applications, ranging from scientific studies on particle physics to radiation therapy for cancer patients. Temperature control of vital parts of the system is critical for operational integrity, performance accuracy and system reliability. In addition, like most sensitive medical and laboratory equipment, particle accelerators are negatively affected by thermal variations, especially by heat increase.
Read More: Cooling Particle Accelerators

Spindle Screw Pump

Medical imaging systems demand a liquid cooling environment with steady flow rate, low noise and long operating life. Laird Thermal Systems’ spindle screw pump delivers high and consistent performance and is ideally suited for this type of liquid cooling system.

Compared to centrifugal pumps, Laird Thermal Systems’ spindle screw technology can pump fluids of higher viscosity without losing flow rate, and pressure changes have little impact on pump performance. This is vital in high G-force applications, such as a rotating gantry system used in a CT scanner as the pump is able to maintain constant flow and pressure while under high G-force stress.

One of the most critical components in a liquid cooling system is the pump. Pumps are in constant operation when the cooling unit is turned on. It also typically has the shortest mean time between failure (MTBF) of all components due to friction wear of bearings, pump blades and seals. If the pump fails prematurely, so will the LCS, causing the medical imaging system to stop working. This can be a problem for medical equipment where hundreds of thousands of dollars per day could be lost.

Laird Thermal Systems’ three-screw pump is comprised of a single rotor element that is powered, while two others are idle. Spindle screw pumps move fluid axially without turbulence, eliminating foaming that would otherwise occur in viscous fluids. The idle rotors are rotated by liquid pressure, essentially generating a fluid bearing, or hydrodynamic film, that provides radial support similar to journal bearings.
Read More: Spindle Screw Pump App Note