Intended for use by a qualified/trained medical professionals, who have full understanding of the safety information and emergency procedures as well of capabilities and function of the device provides radiographic, multiradiographic and fluoroscopic imaging and is used for guidance and visualization during diagnostic radiographic, surgery, and interventional procedures. The device is to be used in healthcare facilities both inside of hospital, in a variety of procedures of the skull, spinal column, extremities, and at the discretion of the medical professional the device may be used for other imaging applications on all pediatric patients (birth to 21 years) within the limits of the device. Applications can be performed with the patient sitting, standing, or lying in the prone or supine position. The system is not intended for mammography applications
Device Story
Mobile digital imaging system for radiographic and fluoroscopic procedures; provides guidance/visualization during surgery and interventions. Features 'Virtual C-arm' technology using Machine-Vision Collimator (MVC) with four independent shutters to automatically align radiation beam with detector active area; eliminates mechanical linkage (c-arm/u-arm) between x-ray source and detector. System displays real-time video of patient with superimposed shaded area representing radiation beam location. Operated by qualified medical professionals in healthcare facilities. Input: x-ray exposure; Output: static/dynamic digital images. Benefits: enables dynamic imaging without mechanical linkage; smaller detector panel optimized for pediatric patients. Healthcare providers use real-time visual feedback for precise beam positioning and procedural guidance.
Clinical Evidence
No clinical data provided. Substantial equivalence supported by bench testing, including electrical safety (IEC 60601-1 series) and EMC testing (EN 60601-1-2, EN 301 489 series). Digital panel performance previously cleared under K171137.
Indicated for pediatric patients (birth to 21 years) requiring radiographic, multiradiographic, and fluoroscopic imaging for guidance and visualization during diagnostic, surgical, and interventional procedures of the skull, spinal column, and extremities. Not intended for mammography.
Regulatory Classification
Identification
An image-intensified fluoroscopic x-ray system is a device intended to visualize anatomical structures by converting a pattern of x-radiation into a visible image through electronic amplification. This generic type of device may include signal analysis and display equipment, patient and equipment supports, component parts, and accessories.
Special Controls
*Classification.* Class II (special controls). An anthrogram tray or radiology dental tray intended for use with an image-intensified fluoroscopic x-ray system only is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 892.9. In addition, when intended as an accessory to the device described in paragraph (a) of this section, the fluoroscopic compression device is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 892.9.
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September 24, 2021
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Portavision Medical LLC % Mr. Daniel Kamm Principal Engineer Kamm & Associates 8870 Ravello Ct NAPLES FL 34114
Re: K212557
Trade/Device Name: Virtual C DRF-NEO Digital Imaging System Regulation Number: 21 CFR 892.1650 Regulation Name: Image-intensified fluoroscopic x-ray system Regulatory Class: Class II Product Code: OWB, JAA, OXO Dated: August 11, 2021 Received: August 13, 2021
Dear Mr. Kamm:
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. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. 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. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
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
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801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4, Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
. for
Thalia T. Mills, Ph.D. Director Division of Radiological Health OHT7: Office of In Vitro Diagnostics and Radiological Health Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K212557
Device Name
Virtual C DRF-NEO Digital Imaging System
#### Indications for Use (Describe)
Intended for use by a qualified/trained medical professionals, who have full understanding of the safety information and emergency procedures as well of capabilities and function of the device provides radiographic, multiradiographic and fluoroscopic imaging and is used for guidance and visualization during diagnostic radiographic, surgery, and interventional procedures. The device is to be used in healthcare facilities both inside of hospital, in a variety of procedures of the skull, spinal column, extremities, and at the discretion of the medical professional the device may be used for other imaging applications on all pediatric patients (birth to 21 years) within the limits of the device. Applications can be performed with the patient sitting, standing, or lying in the prone or supine position. The system is not intended for mammography applications
X Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
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## 510(K) Summary, K212557
Image /page/3/Picture/1 description: The image shows the logo for PortaVision Medical. The logo consists of three blue circles that are overlapping. The letters P, V, and M are written in white inside the circles. The words "PortaVision Medical" are written in a smaller font below the circles.
PortaVision Medical LLC 800 Central Avenue Jefferson, Louisiana 70121 Phone: 866-783-4133 email: info@pvmed.net www.portavisionmedical.com Contact: Terry Ancar, President Date Prepared: August 26, 2021
- 1. Identification of the Device: Trade/Device Names: Virtual C DRF-NEO Digital Imaging System Regulation Number: 21 CFR 892.1650 Regulation Name: Image intensified fluoroscopic x-ray system Regulatory Class: II Product Codes: OWB, JAA, OXO Common/Usual Name: Mobile Fluoroscopic System
- 2. Equivalent legally marketed device: K211191 Trade/Device Name: Virtual C DRF Digital Imaging System Manufacturer: PortaVision Medical Regulation Number: 21 CFR 892.1650 Regulation Name: Image intensified fluoroscopic x-ray system Regulatory Class: II Product Code: OWB, JAA, OXO Common/Usual Name: Mobile Fluoroscopic System
- Reference Device: DRTECH FLAT PANEL DETECTOR EVS 2430W 3. 510(K) Number K171137 Regulation Number: 21 CFR 892.1650 Regulation Name: Image intensified fluoroscopic x-ray system Regulatory Class: Il Product Code: MQB
- 4. Indications for Use: Intended for use by a qualified/trained medical professionals, who have full understanding of the safety information and emergency procedures as well of capabilities and function of the device. The device provides radiographic and fluoroscopic imaging and is used for guidance and visualization during diagnostic radiographic, surgery, and interventional procedures. The device is to be used in healthcare facilities both inside and outside of hospital, in a variety of procedures of the skull, spinal column, chest, abdomen, extremities, and at the discretion of the medical professional the device may be used for other imaging applications on all pediatric patients (birth to 21 years) within the limits of the device. Applications can be performed with the patient sitting, standing, or lying in the prone or supine position. The system is not intended for mammography applications. (Rx Only).
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- 5. Description of the Device: The Virtual C DRF-NEO system is a mobile imaging system that acquire, process and display both static radiographic images and dynamic radiographic images such as photo-spot and fluoroscopy. Dynamic image acquisition is performed without the limitation of a mechanical linkage between the x-ray source and the x-ray detector. The mechanical linkage typical in existing dynamic imaging systems is either a c-arm or u-arm that ensures the alignment of the imaging components during image acquisition. The Virtual C DRF-NEO System features a novel collimator with built-in x-ray source to detector alignment software (Machine-Vision Collimator (MVC), combine they provide the technology for a "virtual c-arm" system. The novel MVC utilized four independent shutter to automatically position the radiation beam, so the area of exposure always remains within the confines of the active area of the detector. In addition, the angle and inclination of x-ray source is displayed to the operator. A visual display provides real time video images of the patient and a shaded area within the video images represent the location and size of the radiation beam with respect to the patient.
- 6. Safety and Effectiveness, comparison to predicate device. This device has similar indications for use and similar technological characteristics as the predicate device and employs already 510(k) cleared digital panels. The chief differences are: The predicate uses a different flat panel detector and mobile cart. Otherwise, the two systems have the same functionality and uses.
| Characteristics | Predicate Device<br>Virtual C DRF Digital Imaging System<br>K211191 | Proposed Device<br>Virtual C DRF-NEO Digital Imaging<br>System |
|---------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Intended Use | Intended for use by a qualified/trained<br>medical professionals, who have full<br>understanding of the safety information and<br>emergency procedures as well of<br>capabilities and function of the device. The<br>device provides radiographic,<br>multiradiographic and fluoroscopic imaging<br>and is used for guidance and visualization<br>during diagnostic radiographic, surgery, and<br>interventional procedures. The device is to<br>be used in healthcare facilities both inside<br>and outside of hospital, in a variety of<br>procedures of the skull, spinal column,<br>chest, abdomen, extremities, and at the<br>discretion of the medical professional the<br>device may be used for other imaging<br>applications on all patients except<br>neonates (birth to one month) within the<br>limits of the device. Applications can be<br>performed with the patient sitting,<br>standing, or lying in the prone or supine<br>position. The system is not intended for<br>mammography applications (Rx Only) | Intended for use by a qualified/trained<br>medical professionals, who have full<br>understanding of the safety information<br>and emergency procedures as well of<br>capabilities and function of the device. The<br>device provides radiographic, multi-<br>radiographic and fluoroscopic imaging and<br>is used for guidance and visualization<br>during diagnostic radiographic, surgery,<br>and interventional procedures. The device<br>is to be used in healthcare facilities both<br>inside and outside of hospital, in a variety<br>of procedures of the skull, spinal column,<br>chest, abdomen, extremities, and at the<br>discretion of the medical professional the<br>device may be used for other imaging<br>applications on all pediatric patients (birth<br>to 21 years) within the limits of the device.<br>Applications can be performed with the<br>patient sitting, standing, or lying in the<br>prone or supine position. The system is<br>not intended for mammography<br>applications. (Rx Only)<br>Comment: The new smaller panel is<br>better suited to smaller patients. |
| Energy Source | 110V-120V, Single 50-60 Hz | 110V-120V, Single 50-60Hz |
| Characteristics | Predicate Device<br>Virtual C DRF Digital Imaging System<br>K211191 | Proposed Device<br>Virtual C DRF-NEO Digital Imaging<br>System |
| System Weight and<br>Size | 121 lbs. 36" x 26" x 77" | 121 lbs. 36" x 26" x 77" |
| Generator Type | High frequency Inverter type | High frequency Inverter type |
| Maximum Output<br>Power | 80 KV x 2 mA = 160 watts | 80 KV x 2 mA = 160 watts |
| Fluoroscopy<br>Continuous | .1 – 2 mA | .1 – 2 mA |
| Radiography<br>KV range | 30 - 80 KV | 30 - 80 KV |
| mA range | 0.1 - 2 mA | 0.1 - 2 mA |
| Pulse width | 10 ms | 10 ms |
| Pulse rate | 1 - 15 fps | 1 - 15 fps |
| X-ray Tube | Stationary anode | Stationary anode |
| Indicators | Display on workstation monitor | Same as predicate |
| Collimator | Machine Vision motorized made by<br>PortaVision, model MVC Accession #<br>2010848-000<br>Image: Collimator | Machine Vision motorized made by<br>PortaVision, model MVC Accession #<br>2010848-000 SAME<br>Image: Collimator |
| Digital Panel<br>Specification | DRTECH EVS 4343WP & 4336WP<br>previously cleared K193031 | DRTECH EVS 2430W 10 x 12<br>DRTECH cleared K171137 |
| Pixel Pitch | EVS 4343WP: 140 μ<br>EVS 3643WP: 140 μ | EVS 2430W 76 μ |
| Resolution | EVS 4343WP: 3,072 x 3,072<br>EVS 3643WP: 2,560 x 3,072 | EVS 2430W<br>2,298 x 2882 |
| AD Conversion | 16 bits | 16 bits (SAME) |
| DQE | EVS 4343WP: 50.0 % at 1.0 lp/mm<br>EVS 3643WP: 52.3 % at 1.0 lp/mm | EVS 2430W<br>45% at 1.0 lp/mm |
| MTF | EVS 4343WP: 52.3 % at 2.0 lp/mm<br>EVS 3643WP: 46.8 % at 2.0 lp/mm | EVS 2430W<br>35% at 2.0 lp/mm |
| Frame Rate (Panel) | 15fps (1x1, Full resolution. | 20fps (1×1, Full resolution)<br>40fps (2×2, Full resolution) |
| Image acquisition | Amorphous Silicon Direct deposition<br>CsI:TI | Amorphous Silicon Direct deposition<br>CsI:TI |
| Characteristics | Predicate Device<br>Virtual C DRF Digital Imaging System<br>K211191 | Proposed Device<br>Virtual C DRF-NEO Digital Imaging<br>System |
| Connection | Ethernet or Wi-Fi | Same as predicate |
| DICOM | Yes | Same as predicate |
| Energy used and/or<br>delivered | Power Requirements described above.<br>No energy is delivered to the patient. | Same as predicate |
| Performance<br>Standard | 21CFR 1020.30 | Same as predicate |
| Electrical Safety | IEC60601-1:2005 + A1 (2012)<br>IEC60601-1-2:2007<br>IEC60601-1-3:2008<br>IEC60601-2-28:2010<br>IEC60601-2-43:2010<br>IEC60601-2-54:2009<br>NEMA PS 3.1-3.20 | Same as predicate |
| Photo | Image: Virtual C DRF Digital Imaging System | Image: Virtual C DRF-NEO Digital Imaging System |
- 7. Substantial Equivalence Chart:
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The following table compares The Virtual C DRF-NEO software to the predicate software.
| Feature | Predicate Device Virtual C DRF<br>K211191 | Proposed Device<br>Virtual C DRF-NEO |
|-------------------------------|--------------------------------------------|--------------------------------------|
| Acquiring image from detector | Yes | Yes |
| Viewing image | Yes | Yes |
| Change window/level | Yes | Yes |
| Invert | Yes | Yes |
| Lookup Table | Yes | Yes |
| Zoom | Yes | Yes |
| Pan | Yes | Yes |
| Noise Reduction | Yes | Yes |
| Patient Information | Yes | Yes |
| Annotation | Yes | Yes |
| Image rotation | Yes | Yes |
| X-Ray generator control | Yes | Yes |
| DICOM worklist and Send | Yes | Yes |
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- 8. Summary of non-clinical testing: Bench testing was performed to assess the device safety and effectiveness. Electrical safety and EMC testing was performed on the unit. The standards employed were: EN 60601-1-2 (2015): Medical electrical equipment - Part 1-2: General requirements for basic safety and essential performance - Collateral Standard: Electromagnetic disturbances - Requirements and tests EN 301 489-1 V2.2.0 (2017): Electromagnetic compatibility and Radio spectrum Matters (ERM); Electromagnetic Compatibility (EMC) standard for radio equipment and services; Part 1: Common technical requirements & EN 301 489-17 V3.2.0 (2017): Electromagnetic compatibility and Radio spectrum Matters (ERM); Electromagnetic Compatibility (EMC) standard for radio equipment; Part 17: Specific conditions for Broadband Data Transmission Systems AND: IEC 60601-1: 2005 + Corr.1: 2006 + A1: 2012 EN 60601-1: 2006 + A11: 2011 + A1: 2013 + AC:2014 + A12:2014 UNE-EN 60601-1: 2008 + Corr : 2010 + A11: 2012 + AC:2014 + A12:2015 POSE000_14 (General procedure of Safety Lab) EMC and Electrical Safety performance for the digital receptor panels had previously been submitted to FDA in K193031. Software has been written and validated according to the FDA Software Guidance: Guidance for the Content of Premarket Submissions for Software Contained in Medical Devices Document issued on: May 11, 2005 Cybersecurity concerns have been addressed in accordance with: Content of Premarket Submissions for Management of Cybersecurity in Medical Devices Guidance for Industry and Food and Drug Administration Staff (October 2, 2014).
- 9. Summary of clinical testing: No clinical data is necessary to evaluate safety or effectiveness for purposes of determining substantial equivalence of the proposed modification. The digital panel received previous 510(k) clearance
- 10. Conclusion: After analyzing software integration validation, safety testing data, and bench test images, it is the conclusion of PortaVision Medical LLC that the Virtual C DRF-NEO Digital Imaging System is as safe and effective as the…
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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.