The NOMAD™ Dental X-ray System is intended to be used by trained dentists and dental technicians as an extraoral x-ray source for producing diagnostic x-ray images using intraoral image receptors. Its use is intended for both adult and pediatric subjects.
Device Story
NOMAD™ Dental is a portable, handheld dental x-ray system. It integrates x-ray tubehead, controls, and power source into a single unit. Powered by a 14.4 V DC rechargeable NiCd battery pack. Features include a 6.75" diameter Pb-filled acrylic plastic backscatter shield to protect the operator. Operated by trained dentists or dental technicians in a clinical setting. The user selects exposure time via up-down buttons with a timer display. The device emits x-rays to produce diagnostic images on intraoral receptors. Portability allows for flexible positioning during dental imaging procedures, potentially improving workflow efficiency compared to fixed AC-powered systems.
Clinical Evidence
No clinical data. Substantial equivalence is based on bench testing and comparison of technical specifications, including electrical safety standards (IEC60601-1, UL60601-1) and radiation performance standards (21 CFR 1020.30, 1020.31, IEC60601-1-3, IEC60601-2-7).
Technological Characteristics
Handheld portable dental x-ray system. Energy source: 14.4 V DC rechargeable NiCd battery. Fixed output: 60 kVp, 2.3 mA. Exposure time: 0.01–0.99 seconds. Includes Pb-filled acrylic plastic backscatter shield. Standards: IEC60601-1, UL60601-1, EN60601-1, IEC60601-1-2, 21 CFR 1020.30/1020.31, IEC60601-1-3, IEC60601-2-7.
Indications for Use
Indicated for use by trained dentists or dental technicians for adult and pediatric patients as an extraoral diagnostic dental x-ray source to produce images using intraoral image receptors.
Regulatory Classification
Identification
An extraoral source x-ray system is an AC-powered device that produces x-rays and is intended for dental radiographic examination and diagnosis of diseases of the teeth, jaw, and oral structures. The x-ray source (a tube) is located outside the mouth. This generic type of device may include patient and equipment supports and component parts.
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K051795
Image /page/0/Picture/1 description: The image shows the logo and contact information for ARIBEX. The logo features the company name in bold, black letters with a stylized graphic element. Below the logo is the company website, www.aribex.com. The contact information includes the address: 754 South 400 East, Orem, Utah 84097, USA, as well as the phone number: 801.226.5522 and fax number: 801.434.7233.
Tab 4
JUL 1 4 2005
510(k) Summary
NOMAD™ Dental Portable X-ray System June 13, 2005
- 1. Company:
| Name: | Aribex, Inc. |
|----------|--------------------------------------|
| Address: | 754 South 400 East<br>Orem, UT 84651 |
Official Correspondent: D. Clark Turner, PhD, CEO
Telephone No: 801-226-5522 801-434-7233 FAX No:
| 2. Proprietary – Trade Name: | NOMAD™ Dental X-ray System |
|------------------------------|------------------------------------------------------------|
| Classification Name: | Extraoral source x-ray system (per 21CFR section 872.1800) |
| Common/Usual Name: | Portable Dental X-ray System |
- 3. Predicate Device: Portable HDX Intraoral X-ray system, (K021378), manufactured by Flow X-Ray. Literature included at Tab 11.
- 4. Description: NOMAD™ Dental is a portable dental x-ray system that operates on 14.4 V DC supplied by a rechargeable NiCd battery pack. The x-ray tubehead, x-ray controls, and power source are assembled into a single handtubenoud, A ray controlage includes spare batteries, a battery charger, and a backscatter shield.
- 5. Intended Use: The NOMAD™ Dental X-ray System is intended to be used by trained dentists and dental technicians as an extraoral x-ray source for producing diagnostic x-ray images using intraoral image receptors. Its use is intended for both adult and pediatric subjects.
| Feature | Portable HDX<br>Intraoral X-ray<br>K021378 | NOMAD™ Dental<br>X-ray System |
|---------------|----------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------|
| INTENDED USE: | Both systems are intended as extraoral x-ray sources to be used with<br>intraoral image receptors for diagnostic imaging by dentists or dental<br>technicians. | |
- Comparison with predicate device: 6.
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## 6. Comparison (continued)
| Feature | Portable HDX<br>Intraoral X-ray<br>K021378 | NOMAD™ Dental<br>Intraoral X-ray Source |
|-------------------------------------|--------------------------------------------------------------|--------------------------------------------------------------------|
| MECHANICAL: | | |
| Size: Body | 5.5"H x 8.25" W x 8" D | 13"L x 11.5"H x 5.5"W |
| Weight | 11.7 lbs. | 8.5 lbs. |
| Source to skin distance | 20 cm | 20 cm |
| Cone diameter | 6.3 cm | 6 cm |
| User Interface | Up-down buttons for exposure<br>time selections with display | Up-down buttons for exposure<br>time selection, with timer display |
| Backscatter radiation<br>protection | Circular scatter shield | 6.75" dia. Pb-filled acrylic plastic<br>scatter shield |
| Exposure switch | On tubehead assembly, or at<br>control panel | On tubehead assembly/ control<br>panel |
| Tubehead mounting | Handheld, or on a tripod | Handheld |
| ELECTRICAL: | | |
| Energy Source | 120 V 50/60 Hz or 240 V 50/60<br>Hz AC | Rechargeable 14.4 V DC NiCd<br>battery pack |
| Exposure Time | 0.01 – 2.00 seconds in 0.01<br>increments | 0.01 - 0.99 seconds in 0.01<br>increments |
| Timer Accuracy | ±(10% + 1ms) | ±(10% + 1ms) |
| mA | 7 mA fixed | 2.3 mA fixed |
| kVp | 65 kVp fixed | 60 kVp fixed |
| Waveform | Constant Potential (DC) | Constant Potential (DC) |
| Duty Cycle | 1:60 | 1:60 |
| Electrical Safety<br>Standards | UL 2601, CSA 601-M90,<br>EN60601-1: 1990+A1+A2 | IEC60601-1, UL60601-1,<br>EN60601-1 |
| EMI Standards | IEC60601-1-2 | IEC60601-1-2 |
| X-RAY<br>PERFORMANCE: | | |
| Performance Standard | 21 CFR 1020.30 | 21 CFR 1020.30, 1020.31<br>IEC60601-1-3<br>IEC60601-2-7 |
#### 7. Conclusion:
The only significant technological difference, DC battery power versus AC line voltage, has no bearing on safety or effectiveness of the new device. Since inte voltage, has no boaining on balely in is substantially equivalent to the predicate device.
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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 features a stylized caduceus, a symbol often associated with medicine and healthcare. The words "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" are arranged in a circular pattern around the caduceus.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
# JUL 1 4 2005
Aribex, Inc. % Mr. Morten Simon Christensen Staff Engineer & FDA Office Coordinator Medical Device Services Underwriters Laboratories, Inc. 1655 Scott Boulevard SANTA CLARA CA 95050-4169
Re: K051795 Trade/Device Name: NOMAD™ Dental X-ray System Regulation Number: 21 CFR 872.1800 Regulation Name: Extraoral source x-ray system Regulatory Class: II Product Code: EHD Dated: July 1, 2005 Received: July 5, 2005
Dear Mr. Christensen:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced w one reviewed 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 the cholors, to e enactment date of the Medical Device Amendments, or to devices that have been reay 20, 1970, all clares 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 do not require approvisions 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 (Premarket 11 your al), it may be subject to such additional controls. Existing major regulations affecting your I tpp. o an 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) (2) CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
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This letter will allow you to begin marketing your device as described in your Section 510(k)
The States will and and on the best of a location at the squice to a legally This letter will allow you to begin maketing your antial equivalence of your device to a legally
premarket notification. The FDA finding of substantial equivales and thus, p premarket notification. The PDA miding of Substantial off.
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 If you desire specific advice for your device on our laboring regionation (
contact the Office of Compliance at one of the following numbers, based on the regulation number a the top of this letter:
| 21 CFR 876.xxxx | (Gastroenterology/Renal/Urology) | 240-276-0115 |
|-----------------|----------------------------------|--------------|
| 21 CFR 884.xxxx | (Obstetrics/Gynecology) | 240-276-0115 |
| 21 CFR 892.xxxx | (Radiology) | 240-276-0120 |
| Other | | 240-276-0100 |
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Also, please note the regulation entitled, "firstnation on your responsibilities under the Act from the 807.97). You may obtain other geleral information on your repeared its toll-free number (800) Division or (301) 443-6597 or at its Internet address 058-2041 of (501) vicdrh/industry/support/index.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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#### Tab 3
## Indications For Use
510(k) Number:________________________________________________________________________________________________________________________________________________________________
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Device Name: NOMAD™ DENTAL X-ray System
Indications for Use: The NOMAD™ DENTAL X-ray System is indicated for use Indications for USe. The NOM/ - Dental technician for both adult and the only by a trained and qualified dentist of dontal coomist.
pediatric subjects as an extraoral diagnostic dental x-ray source to produce x-ray images using intraoral image receptors.
# (PLEASE DO NOT WRITE BELOW THIS LINE – CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
Nancy Brogdon
(Division Sign-Off)
Division of Reproductive, Abdominal,
and Radiological Devices
510(k) Number K051795
Prescription Use_X (per 21CFR801.109) OR
Over-The-Counter Use _________________________________________________________________________________________________________________________________________________________
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.