Polarean Xenon
Polarean · Model Xenon
Principles of Xenon MRI Technology The operating principle of Xenon MRI is based on the hyperpolarization of xenon gas (¹²yXe). A dedicated polarization system uses circularly polarized laser light to align the nuclear spins of xenon atoms, increasing their magnetic resonance signal by several orders of magnitude. Importantly, this process does not alter the chemical properties of xenon, preserving its inert behavior. Once hyperpolarized, the xenon gas is inhaled by the patient, occupying the airspaces of the lungs. When imaged using MRI, the enhanced signal allows for highly sensitive detection of lung ventilation and gas distribution, overcoming the traditional limitations of proton-based MRI in pulmonary imaging. Functional and Quantitative Lung Imaging Hyperpolarized Xenon MRI enables quantitative assessment of lung function, including: Regional ventilation distribution Ventilation defects Gas diffusion and transfer Lung morphology and microstructural integrity Because xenon is soluble in pulmonary tissue and blood, Xenon MRI can also provide insights into alveolar-capillary gas exchange, offering functional information that is not accessible through CT, X-ray, or standard MRI techniques.
Key tips
- ·Never bypass a radiation interlock to "just get the image" - this is one of the few true zero-tolerance rules in BMET work.
- ·Trend image-quality phantom results over time - drift shows up before an outright failure does.
- ·Portable/mobile units take real physical abuse from transport - check wheel locks and cable strain reliefs more often than fixed units.
Typical Failure Modes
Failure patterns typical of this equipment class - general BMET reference, not verified against this exact unit's own service history unless flagged. Severity is a category-level estimate.
Helium / cryogen pressure fault
HighSymptoms: Cold-head fault, quench alarm.
Root cause: Cold-head compressor wear or helium loss.
Gradient coil overheating
HighSymptoms: Sequence abort, thermal alarm.
Root cause: Cooling loop restriction or coil wear.
RF coil element failure
MediumSymptoms: Signal dropout, noise-band image artifact.
Root cause: Coil element or cable damage.
Recon / system software hang
LowSymptoms: Frozen console, acquisition timeout.
Root cause: Workstation or RAID degradation.
Serviceable Parts & Consumables
The parts a BMET typically services on this class of equipment. Service class and relative cost are general engineering estimates for the category, not figures from this unit's documentation. Part numbers appear only when pulled from this unit's own service manual. Always confirm intervals and pricing against the manufacturer.
RF receive coil
Most-replaced patient-facing component.
Class Major service partRel. cost $$$$R&R Moderate
Cold head / compressor
Critical for magnet cooling.
Class Major service partRel. cost $$$$R&R Expert-level
Gradient coil cooling pump
Class Periodic replacementRel. cost $$$R&R Difficult
Workstation RAID / GPU
Class Periodic replacementRel. cost $$$R&R Difficult
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| RF receive coil Most-replaced patient-facing component. | Major service part | $$$$ | Moderate |
| Cold head / compressor Critical for magnet cooling. | Major service part | $$$$ | Expert-level |
| Gradient coil cooling pump | Periodic replacement | $$$ | Difficult |
| Workstation RAID / GPU | Periodic replacement | $$$ | Difficult |
Relative cost: $ lowest · $$$$ highest service-part cost for this equipment class. Not a price.
PM Checklist
Preventive-maintenance tasks typical of this equipment class. Perform to the manufacturer's procedure and your facility's policy - this is general reference, not a schedule for this specific unit.
- ·Daily QC per modality: image-quality phantom test
- ·Tube and detector inspection
- ·Annual state-required radiation safety survey
- ·Vendor-scheduled preventive maintenance
Troubleshooting Approach
A structured starting point derived from the failure modes above. Follow the manufacturer's service documentation for the actual procedure.
Symptom: Helium / cryogen pressure fault
- Confirm the presentation - typically cold-head fault, quench alarm - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: cold-head compressor wear or helium loss.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the rF receive coil per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Symptom: Gradient coil overheating
- Confirm the presentation - typically sequence abort, thermal alarm - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: cooling loop restriction or coil wear.
- Isolate the affected subsystem using the manufacturer's functional check or self-test, where one is provided.
- If the fault is confirmed and not a field adjustment, service or replace the cold head / compressor per the manufacturer's service documentation.
- Return the device to service only after the manufacturer's functional and applicable electrical-safety checks pass.
- Record the findings, any parts used, and the verification results in the maintenance history.
Typical Location
Where this class of equipment is typically deployed - general reference, not this unit's own placement record.
- Radiology / Imaging department
- Emergency Department (portable units)
- Operating Room (C-arms)
- Cath lab
- Bedside ICU (portable X-ray)
Documents & Manuals
No documents available for this device yet.
Troubleshoot this device with Bio
Describe a symptom or error code. Bio answers from this device's own documented error codes, failure modes, parts, and guides.
Ask Bio →