The DPX Series Bravo, Duo Bone Densitometer provides an estimate of BMD at the spine, proximal femur and forearm regions. This BMD value can then be compared to a reference population at the sole discretion of the physician. The DPX Duo has mechanical features to allow use as an exam table when bone densitometry is disabled and the scan arm is rotated and locked parallel to the table. The use of the DPX Series Bravo, Duo Bone Densitometer is restricted to prescription use only. The operator's manual for the DPX Series Bravo, Duo system contain the following statement: "United States Federal Law restricts this device to the sale, distribution, and use by or on the order of a physician."
Device Story
The DPX Series Bravo, Duo Bone Densitometer is a diagnostic imaging system used to estimate Bone Mineral Density (BMD) in the spine, proximal femur, and forearm. The device utilizes ionizing radiation to perform a 90-second scan. The system processes scan data to calculate BMD (g/cm²), which clinicians use to compare against reference populations for bone health assessment. The DPX Duo model includes a mechanical feature allowing the scan arm to rotate and lock parallel to the table, enabling the device to function as a standard exam table when not in use for densitometry. Operated by trained personnel in clinical settings, the device provides quantitative outputs that assist physicians in clinical decision-making regarding bone health. The system is intended for prescription use only.
Clinical Evidence
Clinical evidence includes in vivo comparison of 45 subjects. BMD estimations at the spine showed a correlation of r>0.983 with the predicate Prodigy device. Average BMD values were similar between the subject and predicate devices. Precision metrics (%CV) were reported as <0.27% in vitro, and in vivo short-term precision was approximately 1.2% for spine, 0.80% for total proximal femur, and 1.7% for forearm sub-regions. These results are comparable to currently marketed devices.
Technological Characteristics
Bone densitometer utilizing ionizing radiation (2.0 mrem per measurement). Performs 90-second scans. Features a rotatable scan arm for dual-use as an exam table. Connectivity and software architecture details are not specified beyond standard densitometry processing. No specific materials or ASTM standards provided.
Indications for Use
Indicated for the estimation of Bone Mineral Density (BMD) at the spine, proximal femur, and forearm regions in patients requiring bone density assessment. Restricted to prescription use only.
Regulatory Classification
Identification
A bone densitometer is a device intended for medical purposes to measure bone density and mineral content by x-ray or gamma ray transmission measurements through the bone and adjacent tissues. This generic type of device may include signal analysis and display equipment, patient and equipment supports, component parts, and accessories.
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Image /page/0/Picture/0 description: The image shows the General Electric (GE) logo. The logo consists of the letters 'G' and 'E' intertwined in a stylized, circular design. The letters are in a bold, sans-serif font and are surrounded by a circular border with decorative swirls.
JUL 2 5 2003
GE Medical Systems : (7:14:10)
der and des Mems 1507
# 11.0 510(k) SUMMARY OF SAFETY AND EFFECTIVENESS
This summary of safety and effectiveness information is submitted in accordance with the requirements of 21 CFR 807.92(c).
| Contact Person: | James P. Raskob<br>GE LUNAR Corporation<br>726 Heartland Trail<br>Madison, WI 53717 |
|----------------------|-------------------------------------------------------------------------------------|
| Phone: | (608) 826-7425 |
| Fax: | (608) 826-7825 |
| Date: | March 25, 2003 |
| Device/Trade Name: | DPX Series Bravo, Duo Bone Densitometer |
| Common Name: | Bone Densitometer |
| Classification Name: | Bone Densitometer<br>21CFR 892.1170 |
| Predicate Device: | LUNAR PRODIGY<br>510(k) K982267<br>LUNAR DPX-Alpha and DPX-L<br>510(k) K904980 |
### DESCRIPTION OF THE DEVICE: 11.1
The DPX series Bravo, Duo Bone Densitometer provides an estimation of Bone Mineral Density (BMD in g/cm²) of the spine, femur and forearm. This BMD value can then be compared to a reference population at the sole discretion of the physician.
The DPX Duo has mechanical features to allow use as an exam table when bone densitometry is disabled and the scan arm is rotated and locked parallel to the table.
{1}------------------------------------------------
## SUMMARY OF TECHNICAL CHARACTERISTICS 11.2
The DPX series Bravo. Duo Bone Densitometer performs a 90 second scan, with a total skin exposure dose of 2.0 mrem per measurement. The radiation exposure of 2.0 mrem is comparable to the predicate Prodigy and DPX-L bone densitometers.
The BMD spine estimations in vivo provided by the DPX series Bravo, Duo correlate r>0.983 with the Prodigy. The average BMD values obtained in 45 subjects in vivo were very similar with Prodigy and DPX series Bravo, Duo. The average short-term precision (%CV) in vitro was <0.27%. The short-term %CV in vivo was approximately 1.2% for spine, 0.80% for total proximal femur and 1.7% for forearm sub regions BMD. These values are comparable to those shown on currently marketed devices.
#### 11.3 CONCLUSION
The DPX series Bravo, Duo Bone densitometer is substantially equivalent to currently marketed devices. No new safety and effectiveness questions are raised with the DPX series Bravo, Duo Bone Densitometer.
James P. Rashol
***_***_ and the word "Signed"
James P. Raskob Name
Safety and Regulatory Engineering Manager Title
Summary of Safety, Effectiveness Page 2 of 2
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Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo is circular and contains the department's name around the perimeter. In the center of the circle is an abstract symbol that resembles an eagle or other bird-like figure with three stylized wings or feathers.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
JUL 2 5 2003
Mr. James P. Raskob Safety and Regulatory Engineering Manager GE Lunar Corporation General Electric Company 726 Heartland Trail MADISON WI 53717
Re: K030962
Trade/Device Name: DPX Series Bravo Duo Bone Densitometer Regulation Number: 21 CFR 892.1170 Regulation Name: Bone Densitometer Regulatory Class: II Product Code: 90 KGI Dated: July 2, 2003 Received: July 3, 2003
Dear Mr. Raskob:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments. or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820); and if applicable, the electronic product radiation control provisions (sections 531-542 of the Act); 21 CFR 1000-1050.
{3}------------------------------------------------
This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Office of Compliance at one of the following numbers, based on the regulation number at the top of the letter:
| 8xx.1xxx | (301) 594-4591 |
|----------------------------------|----------------|
| 876.2xxx, 3xxx, 4xxx, 5xxx | (301) 594-4616 |
| 884.2xxx, 3xxx, 4xxx, 5xxx, 6xxx | (301) 594-4616 |
| 892.2xxx, 3xxx, 4xxx, 5xxx | (301) 594-4654 |
| Other | (301) 594-4692 |
Additionally, for questions on the promotion and advertising of your device, please contact the Office of Compliance at (301) 594-4639. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97) you may obtain. Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address http://www.fda.gov/cdrh/dsma/dsmamain.html.
Sincerely yours,
Nancy C. Brogdon
Nancy C. Brogdon Director, Division of Reproductive, Abdominal and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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## 3.0 INDICATION FOR USE FORM
- 501(k) Number (if known) .
K030962
DPX Series Bravo, Duo Bone Densitometer
- . Indications For Use:
Device name:
.
The DPX Series Bravo, Duo Bone Densitometer provides an estimate of BMD at the spine, proximal femur and forearm regions. This BMD value can then be compared to a reference population at the sole discretion of the physician.
The DPX Duo has mechanical features to allow use as an exam table when bone densitometry is disabled and the scan arm is rotated and locked parallel to the table.
The use of the DPX Series Bravo, Duo Bone Densitometer is restricted to prescription use only. The operator's manual for the DPX Series Bravo, Duo system contain the following statement:
"United States Federal Law restricts this device to the sale, distribution, and use by or on the order of a physician."
# PLEASE DO NOT WRITE BELOW THIS LINE. CONTINUE ON ANOTHER PAGE IF NEEDED.
OR
Concurrence of CDRH, Office of Device Evaluation (ODE)
Prescription Use
(Per 21 CFR 801.109)
(Division Sign-Off) Division of Reproductive, Abdominal, and Radiological Device 510(k) Number
Over-the-Counter Use (Optional Format 1-2-96)
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4. 15.
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Learn the FDA Browser
Two short videos show you everything — or skip straight to the written tutorial if you'd rather read. You can reopen this any time from the Tutorial button in the top bar.
Part 1 — Search, results, and everyday workflows 16 min
Part 2 — Embeddings: the galaxy map 3 min
1. Search: exact and fuzzy
Type a phrase like "coronary artery calcification" into the search box. You get two kinds of results. Exact results match the literal phrase — prefix searches work ("coronary artery calcificati") but suffix searches do not. Fuzzy results match on the meaning and intent of your phrase rather than the exact words, and are sorted by relevance score. Hover over the Exact or Fuzzy badge on any row to see exactly why it matched.
Use the checkboxes above the results to narrow: SaMD keeps only software-only devices, AI / ML keeps only devices with AI.
Exact vs. fuzzy search: what's the difference?
Exact matches on the literal phrase (prefix search works, suffix does not). Fuzzy matches on the meaning and intent of the phrase rather than the exact words. Hover over the badge on any row to see why it matched.
You search "coronary artery calcification" and want only software devices with AI. What two filters do you apply?
Narrow by SaMD (software-only devices), then narrow by AI/ML (devices with AI).
2. The results table
Scroll right in the results table. The intended use is extracted for you — no need to open the PDF. The device story gives a high-level snapshot of what the device does and how it's used. The AI Performance sub-table shows each output name, acceptance criteria, observed values, and development/test dataset descriptions — the same format Innolitics uses for regulatory strategy outputs, and the fastest high-level fingerprint of an AI device. It is AI-generated but has been very reliable in practice.
Where do you find a device's intended use without opening the PDF?
Scroll right in the search results table. The intended use column is extracted for you; no need to dig into the 510(k) summary PDF.
What does the AI Performance sub-table show, and why is it useful?
Output name, acceptance criteria, observed values, development dataset description, and test dataset description. It's the same format we use for regulatory strategy output and Fast 510(k) input, and the fastest high-level fingerprint of an AI device. AI-generated but reliable in practice.
3. Judging fuzzy relevance
Fuzzy results trail off in relevance as you scroll. Use three signals to decide how far down to go: the fuzzy badge explanations, the intended use column, and whether your target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, you're past the relevant zone. A top hit with a low score (~0.4) and a stretched explanation is a hint the closest predicates are far away — the project may be headed for De Novo. Note the fuzzy search is a pattern match: it doesn't handle negation ("not") well, and hardware devices can appear — filter by SaMD/AI ML to cut them.
How do you judge how far down fuzzy search results to go?
Use the relevancy signals: the fuzzy badge explanations, the intended use column, and whether the target output (e.g., Cobb angle) still appears in the AI Performance sub-table. Once it stops appearing, results are trailing off in relevancy.
4. Device detail page: chat and citations
Click a device name to open its detail page: device facts on the left, a chat window on the right. Ask something like "Describe the training data". The answer carries little citation bubbles — click one to jump to the highlighted passage in the source PDF, so you can verify every AI answer against the document. There's also a Download PDF button for sharing.
How do you verify an AI chat answer on the device detail page?
Click the citation bubbles to jump to the relevant highlight in the source document.
Reading rule for every project: how many summaries do you read in full?
At least the three most relevant 510(k) or De Novo summaries, in full. After that, use targeted chat questions to confirm your memory quickly. The tool supports this professional habit — it doesn't replace it.
5. Side-by-side comparison
Select multiple rows in the results table (aim for under ~10), then open the PDF Viewer tab. Ask one question — it goes to all selected devices in parallel, each with citations. This is the fastest way to compare and contrast devices: training data, PCCP scope, how they handled adding new scanners, and so on.
What does the side-by-side PDF viewer mode do?
Select multiple devices, open the PDF viewer tab, and ask one question (e.g., "Describe the training data"). It queries all selected devices simultaneously with citations, so you can compare and contrast quickly.
6. Collections
With rows selected, go to the Collections tab and create a labeled collection (e.g., "Cobb Angle Project"). Reload that selection any time — before a client call, pull up the collection and ask questions across all of its devices at once.
How do you save a set of selected devices for later use?
Select the rows, go to the Collections tab, and create a labeled collection (e.g., "Cobb Angle Project"). You can reload the selection anytime and carry it into the PDF viewer and other tabs that support selections.
7. Product codes and the regulations tree
Click a product code in the results to jump to it in the regulations tree — identification text, sibling product codes, and devices you can open in a PDF viewer on the right. Click a regulation number to see its identification, special controls, and related product codes. You can also search by product code or regulation number at the top of the tree. Always read the special controls if any exist for your device — it broadens your search and sharpens pre-kickoff research.
What can you do from the regulations tree view?
Browse product codes and regulation numbers, read the identification text and special controls, browse sibling product codes, open device PDFs on the right, and search by product code or regulation number at the top of the tree.
8. Chart view
Click Show Chart and segment by regulation number (or product code) to see which regulations dominate your result set. Clicking a regulation takes you into the regulations tree. Great for spotting that most matches are, say, hardware laparoscopic devices — a cue to go back and filter.
How do you see which regulations dominate a search result set?
Click "Show Chart" and segment by Regulation Number. Clicking a regulation takes you to the regulations tree.
9. The predicate graph
Open the Predicates tab for a family-tree view of predicate relationships. Click a node to trace its parents and children; selections from search carry over pre-selected. Commonly predicated devices are worth reading — a lot of people predicated them for a reason. The visual lineage is also handy on client calls, e.g. to show how a predicate family evolved and justify why your predicate still holds.
In the predicate graph, why are commonly predicated devices worth reading?
A lot of people predicated them for a reason. Clicking a node traces parents and children, and selections from search carry over pre-selected.
10. Embeddings: the galaxy map
The Embeddings tab plots every matching document in a 2-D "galaxy map" where semantically similar devices cluster together. Hover or click clusters to explore, and let AI label the clusters for you. Embeddings beat product codes for grouping: two devices can carry different product codes (LLZ vs. QIH) yet do the same thing — the embedding captures the meaning of the intended use and device story. This is also exactly how retrieval-augmented generation (RAG) works under the hood, and it makes a great visual on client calls.
Try it yourself
Head to the search page and work through a few of these AI/ML fuzzy searches to build intuition: perivascular fat on CT · aortic valve calcification opportunistic screening on noncontrast CT · breast cancer prediction on digital pathology slides · autism detection · gestational age prediction · a hearing aid that can also detect a pulse · foundation model based analysis of ECG · large language models · penetration test. Watch how the relevance scores, intended use, and AI Performance tables tell you when results stop being meaningful.