Varex Imaging
Varex Imaging Corporation · Model ICX1101B
An Ionization Chamber is a device that is placed between the patient and an x-ray image receptor to assist the Automatic Exposure Control (AEC) in delivering the proper x-ray dose in medical radiography. This is a device out of the Ionization Chambers series.
Intended use: An electrically isolated or electronically connected gas-filled radiation detection chamber operated in the "ionization chamber" voltage region. It is used with portable survey meters, stationary radiation monitors or analytical counting instruments. The incident radiation sets up a characteristic "saturated current" within the chamber. A number of probes with different size chambers and chamber wall thicknesses are needed to cover the possible range of radiation energies and doses. It is very stable over time and may be used for accurate dosimetry measurements, e.g., source calibrations and inter-comparisons. For accurate measurements, temperature and pressure corrections are needed.
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.
X-ray tube overheating / filament failure
HighSymptoms: Tube won't fire, heat-capacity alarm.
Root cause: Filament wear, cooling failure.
Detector calibration drift
MediumSymptoms: Image noise, artifacts, low SNR.
Root cause: Flat-panel / sensor aging.
Cooling system fault
HighSymptoms: Tube temp alarm, duty-cycle limited.
Root cause: Pump/radiator or coolant loss.
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.
Cooling pump & radiator
Class Periodic replacementRel. cost $$$R&R Difficult
High-voltage generator
Class Major service partRel. cost $$$$R&R Expert-level
Workstation RAID / GPU
Class Periodic replacementRel. cost $$$R&R Difficult
X-ray tube insert
Major R&R; track mAs history.
Class Major service partRel. cost $$$$R&R Expert-level
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| Cooling pump & radiator | Periodic replacement | $$$ | Difficult |
| High-voltage generator | Major service part | $$$$ | Expert-level |
| Workstation RAID / GPU | Periodic replacement | $$$ | Difficult |
| X-ray tube insert Major R&R; track mAs history. | Major service part | $$$$ | Expert-level |
Relative cost: $ lowest · $$$$ 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: X-ray tube overheating / filament failure
- Confirm the presentation - typically tube won't fire, heat-capacity alarm - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: filament wear, cooling failure.
- 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 x-ray tube insert 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: Detector calibration drift
- Confirm the presentation - typically image noise, artifacts, low SNR - and note the exact alarm or message and the conditions when it occurs.
- Check the most likely cause first: flat-panel / sensor aging.
- 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 flat-panel detector 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.
Technical Specs
- MRI safety
- Labeling does not contain MRI Safety Information
- Sterile
- No
- Single use
- No
- Prescription use
- Rx only
- FDA distribution status
- In Commercial Distribution
- Device type (GMDN)
- Ionization chamber radiation measuring probe
- FDA product classification
- Generator, High-Voltage, X-Ray, Diagnostic
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.
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