DEXA Service, Calibration, and Quality Control: What Buyers Need to Know
Last updated: September 28, 2026
Independent service organizations, specialty bone densitometer firms, dealer field engineers, and some hospital biomedical teams service DEXA scanners outside Hologic and GE. Confirm that path before you sign. A used system without it is a parts risk.
DEXA and DXA name the same exam: dual-energy X-ray absorptiometry. The scanner reports bone mineral density, or BMD. Clinicians read that result as a T-score or a Z-score. Those scores stay useful only if calibration holds.
Paint is not a refurbishment. A clean cover over an unserviced table drive is a red flag, not a bargain.
[IMAGE: Photo of a Hologic or GE Lunar bone densitometer in the Amber USA facility during refurbishment, covers open, model name visible. Alt text names the model. Do not show a customer site or a patient.]
Quick Answer
A used DEXA is a clinical asset only with four records. You need a documented refurbishment and scan history from the system. You need a current phantom QC printout and a named service provider after the sale. No QC log, no clinical asset. Price that unit as parts.
Table of Contents
- What refurbishment steps should a quality DEXA refurb include?
- How do I verify the tube count and scan history on a used DEXA?
- What questions should I ask a used DEXA equipment vendor?
- How do I avoid buying an unreliable DEXA scanner?
- What is a service contract for a DEXA scanner and do I need one?
- What does turnkey DEXA installation include?
- Who services DEXA scanners outside the OEM?
- Frequently asked questions
- Before you sign
What refurbishment steps should a quality DEXA refurb include?
A quality DEXA refurbishment follows a written sequence. The shop opens the system and inspects it. The shop evaluates the X-ray tube and the detector. The shop services the table drive and the other mechanical parts. The shop rebuilds the software and the workstation. Cosmetics come last. Calibration against the manufacturer phantom, plus a scan-quality check, closes the job. The buyer receives the printout.
Listing words are not a standard. Refurbished means a documented sequence, a parts record, and a QC printout. Used as-is means the seller did not commit to that work. Tested and working often means the system started. It does not mean the BMD values are stable.
Check X-ray output on the service menu for that model. Do not treat one hour limit as a rule for every Hologic or GE Lunar system. Read the guide to pencil beam versus fan beam DXA before you compare scan time alone.
Record the operating system, the application version, and the license status. A replaced hard drive with no export deletes the history you need.
| Stage | Work performed | Document the buyer receives |
|---|---|---|
| Teardown and inspection | Open the covers. Inspect tube, detector, drives, cables, and workstation. | Inspection notes |
| X-ray tube and generator | Check output on the service menu for that model. | Dated service-menu readings |
| Detector and scan arm | Assess the detector and arm. Note pencil beam or fan beam. | Condition note |
| Mechanical and table drive | Inspect belts, motors, bearings, and position accuracy. | Parts replaced and measurements |
| Software and workstation | Record the OS, application version, database, and DICOM test. | Version record and license status |
| Calibration and phantom QC | Scan the manufacturer phantom and check scan quality. | Printed QC output |
| Cosmetic restoration | Do exterior work after the technical steps. | Photos after technical sign-off |
Ask for the refurb checklist, the parts list, and the QC printouts. Amber USA lists GE Lunar iDXA, GE Lunar Prodigy, Hologic Horizon Wi, and Hologic Discovery for sale. The bone densitometer page states a refurbishment history of more than 20 years and custom reconditioning. The buyer's guide page states that de-install, transport, siting, installation, and calibration are in-house work. Ask for the checklist on the exact unit.
The FDA treats service and remanufacturing as different acts. Service returns a device to OEM specifications and to its original intended use. Remanufacturing changes performance, safety specifications, or intended use. In May 2018, the FDA said objective evidence was not sufficient to treat device service as a widespread public health concern.
How do I verify the tube count and scan history on a used DEXA?
Pull the history from the system. Do not accept a verbal number. Hologic and GE Lunar workstations store scan totals, tube exposure or hour counters, error logs, and QC history in the service menus. Ask for screenshots or a service-report export, plus the patient database count.
Request these items in writing.
- Total scans, and scans by type (spine, hip, and whole body)
- Tube exposure counter, with the date of that reading
- Install date and prior owner
- Date of the last OEM or independent service
Read the numbers against the age of the machine. There is no single pass-fail tube hour limit for every model.
Read the QC log for gaps, a reset plot, or a sudden jump in the phantom value. ISCD 2023 Official Positions say to perform phantom scans at least once per week, as an independent check of calibration. Ask whether a de-installation report exists. Reject a reset database, missing logs, or a refusal to allow inspection.
What questions should I ask a used DEXA equipment vendor?
Ask what the refurbishment included and who did it. Ask for proof of the scan count and the tube counter. Ask what the warranty covers, who installs and calibrates, which licenses transfer, and who services the model after the sale. Write the answers into the quote.
Machine history
1. What is the total scan count, and where is the export?
2. What is the tube counter, and what is the date of that reading?
3. What is the install date, and who was the prior owner?
4. When did an OEM or independent service organization last service the system?
5. Can I see the QC log, and does the log show gaps?
Refurb, warranty, and service
6. Which steps did the shop complete, and which parts did it replace?
7. Where is the phantom calibration printout?
8. Does the warranty cover parts, labor, the X-ray tube, and for how long?
9. Do the license keys transfer, and is OEM software support still open?
10. Who de-installs, ships, installs, and calibrates the system?
11. What happens if the system fails the acceptance test at my site?
12. Who services this model after the warranty, and are parts in stock?
Amber Diagnostics published questions to ask before you buy a used MRI. Use that list as a model. Amber USA does not publish a DEXA warranty duration on its bone densitometer pages. Do not guess a duration, a tube exclusion, or an OEM authorization.
How do I avoid buying an unreliable DEXA scanner?
Buy on documents, not on the lowest price. A missing record either lowers the price or ends the deal.
1. Documented refurbishment, with a parts list.
2. Verifiable history from the system logs.
3. Current phantom QC and calibration.
4. A service path that exists after the sale.
An end-of-support system or a model with scarce parts can look cheap and then sit idle. Confirm parts before you compare prices. A price far below the rest of the used market usually means a missing document or a missing service path. Ask who opened the covers, and who answers the phone in month seven. Put an on-site acceptance test in the contract. Budget rigging, state radiation registration, a physicist survey where required, and training.
Amber USA publishes a bone densitometer pricing guide for cost context. It is not a substitute for the unit records.
What is a service contract for a DEXA scanner and do I need one?
A DEXA service contract prepays preventive maintenance, phone support, and on-site support. Many contracts also cover parts and labor. A high-volume center usually wants a full contract because downtime stops the schedule. A low-volume practice can choose time and materials plus a maintenance visit.
| Tier | Coverage | Best fit | Cost framing |
|---|---|---|---|
| Full parts and labor | Maintenance, phone and on-site support, parts and labor for covered repairs. | High scan volume. | Ask for the annual price as a share of system price. |
| Labor only | Labor for visits. Parts are a separate bill. | Sites that can buy parts. | Compare labor plus likely parts with a full contract. |
| Maintenance only | The scheduled visit. | Low volume, with in-house breakdown response. | Lowest prepaid cost. Breakdowns are extra. |
| Time and materials | Pay per call. | Very low volume, or a low replacement cost. | No prepaid cover. Budget a repair reserve. |
The OEM manual for that model sets the visit interval. Many facilities schedule a visit once or twice a year. That cadence is a planning habit, not a universal OEM rule. Staff still run phantom QC between visits. ISCD calls for phantom scans at least once per week.
A 2012 account by Sheila Sferrella reported OEM support at 10 to 14 percent of equipment cost per year. Third-party contracts in that account averaged 8.3 percent. That figure is not an Amber USA quote. Ask each vendor for the annual price.
Amber USA states that engineers back its warranty coverage and stay on call at all hours. The published page names bone densitometer install and de-install in that scope. That statement is not a contract tier. Ask for response time and warranty length in the quote.
What does turnkey DEXA installation include?
Turnkey installation means one vendor owns the path from purchase to the first patient scan. The scope covers de-installation, pack and ship, site review, rigging, delivery, installation, calibration, phantom QC, DICOM tests, training, and warranty activation.
Confirm room clearance, floor loading, and power against the OEM site plan. Shielding is often light, but state rules differ. Do not treat a general statement as your permit. Register the system with the state radiation control program before clinical use. Schedule a physicist survey when your state or accreditor requires it.
Train technologists on patient position, analysis, and precision assessment. A new system needs a precision check before you trend BMD against old scans. Amber USA publishes de-install, transport, siting, installation, and calibration as in-house work. Confirm that scope and the warranty start date in the quote.
Who services DEXA scanners outside the OEM?
Four groups service these systems outside Hologic and GE. National independent service organizations cover many modalities. Specialty DEXA firms focus on Hologic and GE Lunar. A refurbishing dealer can send field engineers. A hospital biomedical team can service a system when it has training, parts, and service software.
OEM service often costs more and can hold an advantage on new parts and service software. An independent provider can cost less when parts and service keys exist. The FDA states that poor quality service can cause poor device performance. It judges the activity, not the company label.
Ask whether the engineers train on Hologic and GE Lunar, not only on MRI and CT. Ask whether they stock parts, and what response time is in the contract. Newer platforms can block service software without an OEM key. Confirm the service path before you buy the machine, not after.
Amber USA refurbishes the bone densitometers it sells and publishes in-house installation and calibration. It does not publish an OEM authorization claim on these pages. Do not treat a dealer as the OEM. Start with the refurbished bone densitometers Amber USA lists, then request the unit file.
Frequently asked questions
What refurbishment steps should a quality DEXA refurb include?
A quality refurb checks the tube, detector, and table drive, then calibrates against the manufacturer phantom. You need the checklist and the QC printout.
How do I verify the tube count and scan history on a used DEXA?
Pull the tube counter and QC history from the service menu. There is no universal tube-hour cutoff.
What questions should I ask a used DEXA equipment vendor?
Ask who did the refurb, what the logs show, and who services the model after the sale. Write each answer into the quote.
How do I avoid buying an unreliable DEXA scanner?
If the refurb record, the history, the QC printout, or the service path is missing, cut the price or end the deal.
What is a service contract for a DEXA scanner and do I need one?
A service contract prepays maintenance and, on many tiers, parts and labor. Match the tier to scan volume.
What does turnkey DEXA installation include?
Turnkey work covers de-install, installation, calibration, training, and warranty activation. One vendor owns the path.
Who services DEXA scanners outside the OEM?
Independent firms, dealer field engineers, and some in-house biomedical teams service these systems outside the OEM. Confirm parts and model training before you buy.
Before you sign
Ask for the four records before you sign. Amber USA sells refurbished bone densitometers and publishes in-house de-install, transport, siting, installation, and calibration. Call 407-438-7847 or contact Amber USA and request the QC record for the unit. Then read the Amber USA buyer's guides and the note on service engineers on call.
Sources
ISCD Official Positions 2023, Phantom Scanning and Calibration:
FDA, Remanufacturing and Servicing Medical Devices:
FDA Report on the Quality, Safety, and Effectiveness of Servicing of Medical Devices, May 2018:
Sheila Sferrella, Equipment Service: Total Cost of Ownership, Radiology Business, December 28, 2012:
