The Intelli-C is an all-digital multipurpose tilt-C X-ray system, intended for a multitude of diagnostic procedures, including: universal radiographic, radioscopic and fluoroscopic diagnostic X-ray, interventional procedures, vascular and non-vascular procedures, and specialized applications including angiographic studies of the entire body on adults and pediatrics.
Device Story
Multi-purpose tilt-C-arm fluoroscopy system for diagnostic imaging, interventional, and angiographic procedures. Input: X-ray radiation captured by digital flat panel detector (FPD). Operation: C-arm and tabletop movements allow patient positioning; X-ray tube and detector assembly provide imaging. Output: Digital radiographic/fluoroscopic images displayed in control room. Used in clinical departments by trained professionals (physicians/technicians). Controls duplicated on mobile tableside panel for interventional access. System integrates with PACS and Hospital Information System via network. Benefits: FPD technology provides improved patient access, lower radiation doses, wider dynamic range, and elimination of geometric distortions compared to traditional image intensifiers.
Clinical Evidence
Bench testing only. No clinical data provided. Substantial equivalence supported by verification and validation testing of image quality and system integration, alongside peer-reviewed literature documenting the technical advantages of FPD technology (stability, dose reduction, lack of geometric distortion) over image intensifier systems.
Indicated for use as a multipurpose diagnostic X-ray system for universal radiographic, radioscopic, and fluoroscopic studies, including interventional, vascular, non-vascular, and angiographic procedures for adults and pediatrics. Not indicated for mammography. For use by trained professionals only.
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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July 11th, 2018
NRT X-ray A/S % Mr. Kevin Walls Principal Consultant Regulatory Insight, Inc. 33 Golden Eagle Lane LITTLETON CO 80127
Re: K173631
Trade/Device Name: Intelli-C Regulation Number: 21 CFR 892.1650 Regulation Name: Image-intensified fluoroscopic x-ray system Regulatory Class: II Product Code: OWB, JAA Dated: June 30, 2018 Received: July 5, 2018
Dear Mr. Walls:
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. Iisting 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); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (OS) regulation (21 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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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 http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/MedicalDevices/DeviceRegulationandGuidance/) and CDRH Learn (http://www.fda.gov/Training/CDRHLearn). 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 (http://www.fda.gov/DICE) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Jeff Rogero
for Robert Ochs, Ph.D. Director Division of Radiological Health Office of In Vitro Diagnostics and Radiological Health Center for Devices and Radiological Health
Enclosure
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## Indications for Use
510(k) Number (if known)
K173631
Device Name Intelli-C
Indications for Use (Describe)
The Intelli-C is indicated for use as a multipurpose diagnostic X-ray system for universal radioscopic and fluoroscopic studies. With its C-arm and digital flat detector, it can perform a range of applications including interventional procedures, vascular procedures, specialized applications including angiographic studies of the entire body on adults and paediatrics.
The Intelli-C system is only indicated for use by trained professionals. The Intelli-C is not intended for mammography studies.
| Type of Use (Select one or both, as applicable) | |
|-----------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------|
| <span> <span style="font-size: 16px;">☑</span> Prescription Use (Part 21 CFR 801 Subpart D) </span> | <span> ☐ Over-The-Counter Use (21 CFR 801 Subpart C) </span> |
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Image /page/3/Picture/0 description: The image shows the logo for NRT. The logo consists of a circular icon to the left of the letters "NRT". The circular icon is made up of concentric circles. The letters "NRT" are in a sans-serif font and are blue in color.
This summary document has been prepared to meet the conditions of 21 CFR 807.92.
Date of summary:
June 25, 2018
#### Submitter information:
| 510(k) owner: | NRT X-Ray A/S<br>Birkegaardsvej 16<br>8361 Hasselager<br>DENMARK |
|---------------------------------|------------------------------------------------------------------|
| Establishment Registration no.: | 1000188474 |
| Contact person: | Jan Malling, Quality Manager |
| Phone: | +4586283500 |
| E-mail: | jm@nrtxray.com |
#### New device:
| Trade name: | Intelli-C |
|-------------------------|------------------------------------------|
| Common name: | Multi-purpose tilt C |
| Classification name: | Interventional Fluoroscopic X-Ray System |
| Classification: | Class II |
| CFR Section: | 892.1650 |
| Product Code (primary): | OWB |
| (secondary): | JAA |
#### Predicate device:
Trade name: Premarket Notification No.: Manufacturer:
GE Precision MPi K033486 NRT X-Ray A/S Birkegaardsvej 16 8361 Hasselager DENMARK
### Device description for new device:
The Intelli-C device that we wish to bring to market is a multi-purpose - also sometimes known as a universal C-arm fluoroscopy system, designed for diagnostic medical imaging examinations, from barium studies to interventional and angiography studies.
This type of device is typically used in departments with a single fluoroscopy installation that benefit from the versatility of multi-purpose systems that allow a wider range of examinations than a standard fluoroscopy unit. In larger departments such systems can provide backup for other fluoroscopy installations, for example in case of breakdown.
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Image /page/4/Picture/0 description: The image shows the logo for NRT. The logo consists of a circular icon on the left and the text "NRT" on the right. The circular icon is made up of concentric circles, and the text "NRT" is in a sans-serif font and is blue in color.
As with most multi-purpose systems, the Intelli-C has the patient tabletop and C-arm assembly supported on a main column from which the complete unit can be elevated and tilted. The tabletop is supported only at the foot end providing good, all round access to the patient.
The C-arm supports the X-ray tube and image detector assembly and patient coverage is achieved through a combination of C-arm movements and table top movements. The C-arm has angulation and rotational movements, and the source to detector distance is variable. The image detector can be positioned above or below the tabletop depending on the specific examination requirement.
The control room control panel for gantry movements, imaging system, generator and collimator are located in the control room. To facilitate interventional studies to be performed on this type of system, most controls are duplicated on a mobile tableside control panel. The imaging system is normally connected to PACS and Hospital Information System, e.g. patient lists, through the hospital network.
The Intelli-C device will be offered in two main variants:
| NRT REF No.: | Device name: |
|--------------|---------------------------------------|
| 03400000 | Intelli-C, Right side suspended table |
| 03400010 | Intelli-C, Left side suspended table |
The main systems will be offered with a range of options and accessories as listed in section 11 of this application.
### Electrical safety, EMC and QMS:
The Intelli-C device is tested to the below listed international standards, including FDA performance standards 21 CFR 1020.30, 31 and 32. Design and production controls are carried under a Quality Management System in compliance with 21 CFR 820 and ISO 13485 requirements.
| Standard | Title | Revision | Date |
|----------------|-------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-------------|-----------|
| IEC 60601-1 | Medical electrical equipment –<br>Part 1: General requirements for basic safety and essential performance<br>(including US national differences) | Edition 3.1 | (2012-08) |
| IEC 60601-1-2 | Medical electrical equipment –<br>Part 1-2: General requirements for basic safety and essential performance<br>Collateral standard: Electromagnetic disturbances - Requirements and tests | Edition 4.0 | (2014-02) |
| IEC 60601-1-3 | Medical electrical equipment –<br>Part 1-3: General requirements for basic safety and essential performance<br>Collateral Standard: Radiation protection in diagnostic X-ray equipment | Edition 2.1 | (2013-04) |
| IEC 60601-2-43 | Medical electrical equipment –<br>Part 2-43: Particular requirements for basic safety and essential performance<br>of X-ray equipment for interventional procedures | Edition 2.0 | (2010-03) |
| IEC 60601-2-54 | Medical electrical equipment –<br>Part 2-54: Particular requirements for the basic safety and essential performance of X-ray equipment for radiography and radioscopy | Edition 1.1 | (2015-04) |
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Image /page/5/Picture/0 description: The image shows the logo for NRT. The logo consists of a circular design on the left and the letters "NRT" on the right. The circular design has concentric circles, and the letters "NRT" are in a sans-serif font. The logo is in blue.
### Comparison with predicate device:
The Intelli-C and GE Precision MPi are very similar on all comparable parameters. The predicate device comparison in section 12 of this application, contains a detailed discussion of all differences between the Intelli-C and its predicate device, the GE Precision MPi.
For the purpose of this 510(k) Summary, please find a comparison of the Intended Use, Indications for Use, target population and selected technology aspects below:
#### Comparison table, Intended Use, Indications for Use and target population:
| | Intelli-C | Precision MPi |
|-------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Intended use: | The Intelli-C is an all-digital multipurpose tilt-C X-ray system, intended<br>for a multitude of diagnostic procedures, including: universal<br>radiographic, radioscopic and fluoroscopic diagnostic X-ray,<br>interventional procedures, vascular and non-vascular procedures, and<br>specialized applications including angiographic studies of the entire<br>body on adults and pediatrics. | The GE Precision MPi is an all-digital multipurpose<br>tilt-C X-ray system, intended for a multitude of<br>diagnostic procedures, including: R&F, radiology,<br>fluoroscopy, interventional procedures, vascular<br>and non-vascular procedures, and specialized<br>applications including angiographic studies |
| Indications for<br>use: | The Intelli-C is indicated for use as a multipurpose diagnostic X-ray<br>system for universal radiographic, radioscopic and fluoroscopic studies.<br>With its C-arm and digital flat detector, it can perform a range of<br>applications including interventional procedures, vascular and non-<br>vascular procedures, specialized applications including angiographic<br>studies of the entire body on adults and pediatrics.<br>The Intelli-C is not indicated for mammography studies. | The GE Precision MPi is a multi-purpose system<br>that can perform general R&F, radiography,<br>fluoroscopy, interventional and angiography<br>procedures/applications. |
| Target<br>population: | Adults and pediatrics | All, no limitations |
### Technological differences:
The Intelli-C is the successor to the predicate device, GE Precision MPi, which was also manufactured by NRT X-ray A/S. The main difference between the Intelli-C and the Precision MPi is the introduction of a digital flat panel detector (FPD). The FPD adds benefits such as improved patient access, lower patient radiation doses, and wider dynamic ranges when compared to the Image Intensifier, utilized in the predicate device.
The difference in other X-ray critical components from when the predicate device was produced are reflecting the current state-of-the-art developments from the manufacturers of X-ray High Voltage Generator, X-ray tube and Beam Limiting Device. As it can be seen from the comparison table below, the manufacturers of the X-ray critical components are the same as for the Precision MPI.
| Component | Intelli-C | Precision MPi |
|---------------------------|-------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------|
| High Voltage<br>Generator | Model:<br>Indico IQ, 80kW<br><br>Manufacturer:<br>Communications & Power Industries Canada Inc. | Model:<br>Indico 100, 100kW<br><br>Manufacturer:<br>Communications & Power Industries Canada Inc. |
| X-ray tube | Model:<br>G1592/B180 or G1092/B160<br><br>Manufacturer:<br>Varex Imaging Corporation | Model:<br>G1592/B180 or G1092/B160<br><br>Manufacturer:<br>Varex Imaging Corporation |
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Image /page/6/Picture/0 description: The image shows the logo for NRT. The logo consists of a circular icon to the left of the letters "NRT". The circular icon is made up of concentric circles, with the innermost circle being solid and the outer circles being broken into segments. The letters "NRT" are in a sans-serif font and are a similar color to the circular icon.
| Imaging system | Model:<br>Nexus DRF Digital X-ray Imaging System (with PaxScan 4343CB).<br>Manufacturer:<br>Varex Imaging Corporation | Model:<br>Platinum One Imaging System<br>Manufacturer:<br>Infimed Inc. (now Varex Imaging Corporation) |
|----------------|-----------------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------|
| Collimator | Model:<br>R 806Q<br>Manufacturer:<br>Ralco S.R.L. | Model:<br>R 806ASFL<br>Manufacturer:<br>Ralco S.R.L. |
The Intelli-C is by no means an early mover into the FPD technology. We believe that the use of FPD technology is the state-of-the-art standard of today and since the majority of transitions from II to FPD took place years ago, we have decided to provide scientific literature that supports the transition from the II based systems to FPD systems. In this search we found the following peer reviewed articles, discussing the advantages and disadvantages using an FPD in place of an II:
#### Peer reviewed articles supporting FPD technology:
| ID | Article title | Author(s) | Published in | Assessment remarks and conclusion |
|----|------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|----------------------------------------------------|------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| 1 | AAPM/RSNA Physics Tutorial<br>for Residents: Physics of Flat-<br>Panel Fluoroscopy Systems<br>Survey of Modern Fluoroscopy<br>Imaging: Flat-Panel Detectors<br>versus Image Intensifiers and<br>More | Edward Lee<br>Nickoloff,<br>DSc | radiographics.rsna.org | The author concludes that Solid-state FPD image receptors<br>have better stability, lower radiation dose rates, and<br>improved dynamic range, and they eliminate glare and<br>geometric distortions such as vignetting and defocusing<br>effects. It is concluded that the fact that FPDs are smaller<br>than image intensifiers allows for more flexible positioning of<br>the angiography and cardiac fluoroscopy systems.<br>The few disadvantages of FPD systems include higher costs<br>and lower spatial resolution with very small and very large<br>FOVS. |
| 2 | The design and imaging<br>characteristics of dynamic,<br>solid-state, flat-panel x-ray<br>image detectors for digital<br>fluoroscopy and fluorography | A.R. Cowen,<br>A.G. Davies,<br>M.U.<br>Sivananthan | The Royal College of<br>Radiologists.<br>Published by Elsevier<br>Ltd. | The authors conclude that the use of FPD technology brings<br>a range of advantages over the II-TV system such as more<br>stable performance, zero geometrical distortion and<br>vignetting, less physical dimensions with great versatility. |
Materials and control elements used for the Intelli-C and the predicate device are comparable and not significantly different.
### Conclusions:
We believe that the Intelli-C will perform as safe and as effective or better than the predicate device. We base our conclusions on the Substantial Equivalence Discussion and Literature summary, documenting the technological differences which include the digital x-ray receptor, user interfaces, x-ray generation component upgrades, and other minor modifications.
The use of a previously cleared digital x-ray receptor and adequate verification and validation testing results document adequate image quality and integration.
We do not see that new issues of safety or effectiveness are raised with the introduction of the Intelli-C Xray device.
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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.
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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?
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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.
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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.
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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?
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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.
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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.
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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.
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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.
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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.
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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.