Hologic Lorad M-IV Series
Hologic · Model Lorad M-IV Series
Exceptional Patient Comfort, Convenience, and Precision - The soft lines and trim silhouette of the M-IV Series enhances patient comfort and ease of positioning, while the recessed face shield and narrow tube head permit flexible and relaxed positioning of the patient Improved Patient Management and Throughput - Patient Scheduling feature allows the technologist to enter up to 100 patients 3-Cell, 7 Position Automatic Exposure Control(AEC) Sensor - This automatic sensor can be positioned in any of seven locations, extending up to 12.5 cm from the chest wall to allow greater and more precise tissue sampling and accurate calculation of proper exposure technique. Even large breasts pose no problem with the increased range of extension Automatic Collimation - Eliminates manual apertures. The field of view is adjusted according to the attached compression device, ensuring that the correct collimation has been selected HTC grid - High Transmission Cellular Grid provides higher contrast images Bi-angular X-ray Tube - Custom designed high performance tube for enhanced magnification views FAST Paddle - Exclusive fully automated self-adjusting tilt paddle, for more uniform compression
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.
Cooling system fault
HighSymptoms: Tube temp alarm, duty-cycle limited.
Root cause: Pump/radiator or coolant loss.
Generator / high-voltage fault
HighSymptoms: Exposure fails, kV/mA out of range error.
Root cause: HV tank or generator board fault.
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.
X-ray tube insert
Major R&R; track mAs history.
Class Major service partRel. cost $$$$R&R Expert-level
Flat-panel detector
Class Major service partRel. cost $$$$R&R Expert-level
Cooling pump & radiator
Class Periodic replacementRel. cost $$$R&R Difficult
High-voltage generator
Class Major service partRel. cost $$$$R&R Expert-level
| Part | Service class | Relative cost | R&R difficulty |
|---|---|---|---|
| X-ray tube insert Major R&R; track mAs history. | Major service part | $$$$ | Expert-level |
| Flat-panel detector | Major service part | $$$$ | Expert-level |
| Cooling pump & radiator | Periodic replacement | $$$ | Difficult |
| High-voltage generator | 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
- Mammography Type
- Analog X-ray
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
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