Standalone portable xenon-129 hyperpolariser for multicentre clinical magnetic resonance imaging of the lungs

OBJECTIVES: Design and build a portable xenon-129 ((129)Xe) hyperpolariser for clinically accessible (129)Xe lung MRI. METHODS: The polariser system consists of six main functional components: (i) a laser diode array and optics; (ii) a B(0) coil assembly; (iii) an oven containing an optical cell; (iv) NMR and optical spectrometers; (v) a gas-handling manifold; and (vi) a cryostat within a permanent magnet. All components run without external utilities such as compressed air or three-phase electricity, and require just three mains sockets for operation. The system can be manually transported in a lightweight van and rapidly installed on a small estates footprint in a hospital setting. RESULTS: The polariser routinely provides polarised (129)Xe for routine clinical lung MRI. To test the concept of portability and rapid deployment, it was transported 200 km, installed at a hospital with no previous experience with the technology and (129)Xe MR images of a diagnostic quality were acquired the day after system transport and installation. CONCLUSION: This portable (129)Xe hyperpolariser system could form the basis of a cost-effective platform for wider clinical dissemination and multicentre evaluation of (129)Xe lung MR imaging. ADVANCES IN KNOWLEDGE: Our work successfully demonstrates the feasibility of multicentre clinical (129)Xe MRI with a portable hyperpolariser system.