This product is intended to be used in displaying digital images for review, analysis and diagnosis by trained medical practitioners. It does not support the display of mammography images for diagnosis.
Device Story
The RadiForce RX660/RX660-AR is a 6MP color LCD monitor designed for clinical review, analysis, and diagnosis of medical images (excluding mammography). It utilizes an IPS panel with 3,280 x 2,048 resolution. The device receives digital video signals via DVI-D or DisplayPort from a workstation. Internal lookup tables store factory-calibrated display modes, including DICOM GSDF compliance, ensuring consistent tone curves regardless of the display controller. The RX660 features an anti-glare surface, while the RX660-AR features an anti-reflection coating. The monitor includes integrated sensors (backlight, front, presence, and ambient light) for automated quality control. RadiCS software, installed on the host workstation, manages quality control, performing quantitative and visual tests. Healthcare providers use the monitor to view high-resolution medical imagery; the device's calibrated luminance and uniformity support accurate diagnostic interpretation. The system is intended for use in clinical environments by trained medical professionals.
Clinical Evidence
No clinical or animal testing was performed. Substantial equivalence is supported by bench testing, including verification of DICOM GSDF conformance, luminance and chromaticity non-uniformity measurements, MTF spatial resolution assessment, and visual artifact checks per AAPM TG18 guidelines.
Technological Characteristics
TFT Color LCD Panel (IPS); 6MP (3,280 x 2,048) resolution; LED backlighting; 1,000 cd/m² max luminance; 1500:1 contrast ratio; 25ms response time. Connectivity: DVI-D (dual link) and DisplayPort. Integrated sensors: backlight, front, presence, and ambient light. Digital Uniformity Equalizer for luminance compensation. Software: RadiCS for quality control. Power: 100-240V AC.
Indications for Use
Indicated for trained medical practitioners to display and view digital images for review, analysis, and diagnosis. Not indicated for the display of mammography images.
Regulatory Classification
Identification
A medical image management and processing system is a device that provides one or more capabilities relating to the review and digital processing of medical images for the purposes of interpretation by a trained practitioner of disease detection, diagnosis, or patient management. The software components may provide advanced or complex image processing functions for image manipulation, enhancement, or quantification that are intended for use in the interpretation and analysis of medical images. Advanced image manipulation functions may include image segmentation, multimodality image registration, or 3D visualization. Complex quantitative functions may include semi-automated measurements or time-series measurements.
Special Controls
*Classification.* Class II (special controls; voluntary standards—Digital Imaging and Communications in Medicine (DICOM) Std., Joint Photographic Experts Group (JPEG) Std., Society of Motion Picture and Television Engineers (SMPTE) Test Pattern).
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Image /page/0/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo consists of a circular border with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES - USA" arranged around the top half of the circle. Inside the circle is a stylized image of three human profiles facing to the right, with flowing lines connecting them.
Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
December 15, 2016
EIZO Corporation % Mr. Hiroaki Hashimoto Manager, Medical System Standards 153 Shimokashiwano Hakusan, Ishikawa 924-8566 JAPAN
Re: K163335
Trade/Device Name: 6MP Color LCD Monitor, RadiForce RX660, RX660-AR Regulation Number: 21 CFR 892.2050 Regulation Name: Picture archiving and communications system Regulatory Class: II Product Code: PGY Dated: November 24, 2016 Received: November 28, 2016
Dear Mr. Hashimoto:
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. 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 801); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); 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.
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If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638 2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. 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 the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours.
Michael D'Hara
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) K163335
Device Name
6MP Color LCD Monitor, RadiForce RX660, RX660-AR
Indications for Use (Describe)
This product is intended to be used in displaying digital images for review, analysis and diagnosis by trained medical practitioners. It does not support the display of mammography images for diagnosis.
Type of Use (Select one or both, as applicable)
X Prescription Use (Part 21 CFR 801 Subpart D)
| Over-The-Counter Use (21 CFR 801 Subpart C)
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Image /page/3/Picture/0 description: The image shows the logo for EIZO. The logo consists of a stylized square shape on the left and the word "EIZO" in bold, sans-serif font on the right. The square shape is divided into smaller squares, some of which are filled in with a darker color, creating a checkered pattern. A small registered trademark symbol is located to the upper right of the letter "O".
EIZO Corporation, 153 Shimokashiwano, Hakusan, Ishikawa 924-8566 Japan
U.S. Food and Drug Administration Center for Devices and Radiological Health Document Mail Center - WO66-G609 10903 New Hampshire Avenue Silver Spring, MD 20993-0002
Hiroaki Hashimoto Name Department Medical System Standards
Telephone +81 (76) 274-2468 Fax E-Mail
# +81 (76) 274-2484 hiroaki.hashimoto@eizo.com
# 510(k) Summary (in accordance with 21 CFR 807.92)
#### 1. Company
EIZO Corporation 153 Shimokashiwano, Hakusan Ishikawa 924-8566 Japan Tel: +81 (76) 274-2468 Fax: +81 (76) 274-2484
# 2. Contact Person
Hiroaki Hashimoto
#### 3. Date of Summary November 24th, 2016
#### 4. Device Information
- Device Name: 6MP Color LCD Monitor, RadiForce RX660, RX660-AR
- Trade Name/Model: RadiForce RX660, RX660-AR ●
- Common Name: 6MP Color LCD Monitor ●
- Classification Name: ● Display, Diagnostic Radiology
- Regulation Number: 21 CFR 892.2050, Product Code PGY ●
#### 5. Predicate Device
6MP Color LCD Monitor, RadiForce RX650 (K134002)
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# 6. Device Description
RadiForce RX660 is a color LCD monitor for viewing medical images other than those of mammography. The color panel employs in-plane switching (IPS) technology allowing wide viewing angles and the matrix size (or resolution) is 3,280 x 2,048 pixels (6MP) with a pixel pitch of 0.1968 mm.
Since factory calibrated display modes, each of which is characterized by a specific tone curve (including DICOM GSDF), a specific luminance range and a specific color temperature, are stored in lookup tables within the monitor, the tone curve is e.g. DICOM compliant regardless of the display controller used.
There are two model variations, RX660 and RX660-AR. The difference of the two variations is the surface treatment of the display screens; the surface treatment of the RX660 is Anti-Glare (AG) treatment and that of the RX660-AR is Anti-Reflection (AR) coating.
RadiCS is application software to be installed in each workstation offering worry-free quality control of the diagnostic monitors including the RadiForce RX660 based on the QC standards and guidelines and is capable of quantitative tests and visual tests defined by them. The RadiCS and its subset, RadiCS LE, are included in this 510(k) submission as an accessory to the RadiForce RX660.
#### 7. Indications for use
This product is intended to be used in displaying and viewing digital images for review, analysis and diagnosis by trained medical practitioners. It does not support the display of mammography images for diagnosis.
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# 8. Comparison of Technological Characteristics
The comparison table below enumerates information derived from the product brochure of the each device and different technological characteristics are discussed in it:
| Attributes | RadiForce RX660 | RadiForce RX650 | Explanation of<br>Differences | | | | | | | | |
|-------------------------------------------------|---------------------------------------------------------------------------------------------------------------------------------------------------|------------------------------------------------------------------------------------------------------------------------------------------------|-------------------------------|------------------------|-------------------------------------------|------------------------------------------------------------------------|---|-------------------------|----------------------------------|--|---|
| Display Performance/Specifications | | | | | | | | | | | |
| Screen<br>technology | TFT Color<br>LCD Panel (IPS) | TFT Color<br>LCD Panel (IPS) | - | | | | | | | | |
| Viewing angle<br>(H, V) | H: 176°, V: 176° | H: 176°, V: 176° | - | | | | | | | | |
| Resolution | 6MP (3,280 x 2,048) | 6MP (3,280 x 2,048) | - | | | | | | | | |
| Aspect ratio | 16:10 | 16:10 | - | | | | | | | | |
| Active screen<br>size | 645.5 mm x 403.0 mm | 645.5 mm x 403.0 mm | - | | | | | | | | |
| Pixel pitch | 0.1968 mm x 0.1968 mm | 0.197 mm x 0.197 mm | - | | | | | | | | |
| Maximum<br>luminance | 1,000 cd/m² | 800 cd/m² | - | | | | | | | | |
| DICOM<br>calibrated<br>luminance | 500 cd/m² | 400 cd/m² | - | | | | | | | | |
| Contrast ratio | 1500 : 1 | 1000:1 | - | | | | | | | | |
| Response<br>Time (typical) | 25 ms (On/Off) | 30 ms (On/Off) | - | | | | | | | | |
| Backlighting | LED | LED | - | | | | | | | | |
| Display Colors | From a palette of 68<br>billion colors:<br>- 10-bit (DisplayPort):<br>1.07 billion colors<br>(maximum)<br>- 8-bit colors: 16.77<br>million colors | From a palette of 68 billion<br>colors:<br>- 10-bit (DisplayPort): 1.07<br>billion colors (maximum)<br>- 8-bit colors: 16.77 million<br>colors | - | | | | | | | | |
| Luminance<br>non-<br>uniformity<br>compensation | Digital Uniformity<br>Equalizer | Digital Uniformity<br>Equalizer | - | | | | | | | | |
| Video Signals | | | | Input video<br>signals | DVI-D (dual link) x 1,<br>DisplayPort x 2 | DVI-D (dual link) x 2,<br>DisplayPort x 2<br>(two inputs are required) | - | Output video<br>signals | DisplayPort x 1 (daisy<br>chain) | | - |
| Video Signals | | | | | | | | | | | |
| Input video<br>signals | DVI-D (dual link) x 1,<br>DisplayPort x 2 | DVI-D (dual link) x 2,<br>DisplayPort x 2<br>(two inputs are required) | - | | | | | | | | |
| Output video<br>signals | DisplayPort x 1 (daisy<br>chain) | | - | | | | | | | | |
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| Scanning<br>Frequency (H,<br>V) | 31 - 127 kHz / 22 - 61 Hz<br>(VGA Text: 69 - 71 Hz)<br>Frame synchronous mode:<br>29.5 - 30.5 Hz, 59 - 61<br>Hz | 31 - 129 kHz / 29 - 61 Hz<br>(VGA Text: 69 - 71 Hz)<br>Frame synchronous mode:<br>29.5 - 30.5 Hz, 59 - 61 Hz | |
|----------------------------------------|-----------------------------------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------------------|------------------------------|
| Power Related Specifications | | | |
| Power<br>Requirements | AC 100 - 240 V:<br>50 / 60 Hz | AC 100 - 120 V,<br>200 - 240 V: 50 / 60 Hz | |
| Power<br>Consumption /<br>Save Mode | 190 W / Less than 1.6 W | 225 W / Less than 6 W | |
| Power<br>Management | DVI DMPM,<br>DisplayPort 1.2a | DVI DMPM,<br>DisplayPort 1.1a | |
| Miscellaneous Features/Specifications | | | |
| QC software | RadiCS | RadiCS | |
| Sensors | Backlight Sensor,<br>Integrated Front Sensor,<br>Presence Sensor,<br>Ambient Light Sensor | Backlight Sensor,<br>Integrated Front Sensor,<br>Presence Sensor,<br>Ambient Light Sensor | |
| USB Ports /<br>Standard | 2 upstream,<br>3 downstream / Rev. 2.0 | 1 upstream,<br>2 downstream / Rev. 2.0 | |
| Dimensions<br>w/o stand<br>(W x H x D) | 682.5 x 441 x 88 mm | 692 x 466 x 109 mm | Different housing<br>design. |
It is clear that the technological characteristics differences discussed above do not affect the safety and the effectiveness of the RX660.
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## 9. Performance Testing
The following bench tests were performed on the RadiForce RX660.
- . Verification of the conformance to DICOM GSDF as specified in Assessment of Display Performance for Medical Imaging Systems by AAPM Task Group 18 (TG18 guideline)
- . Measurement of the luminance non-uniformity characteristics of the display screen as specified in TG18 guideline
- . Measurement of the chromaticity non-uniformity characteristics of the display screen as specified in TG18 guideline
- . Measurement of the chromaticity at the center of the display screen at 5%, 50% and 95% of the maximum luminance
- . Visual check of presence or absence of miscellaneous artifacts on the display screen as specified in TG18 guideline
- . Measurement of spatial resolution expressed as modulation transfer function (MTF)
- The maximum number allowed for each type of pixel defects/faults
The test results showed that the RadiForce RX660 has display characteristics equivalent to those of the predicate device. RadiForce RX650.
Besides, the display characteristics of the RadiForce RX660 meet the pre-defined criteria when criteria are set.
No animal or clinical testing was performed on the RadiForce RX660.
#### 10. Conclusion
The RadiForce RX660 was determined to be substantially equivalent to the predicate device due to the following reasons:
- . The stated intended use is substantially the same as that of the predicate device.
- . It was confirmed that the technological characteristics differences from those of the predicate device do not affect the safety or the effectiveness.
- . The bench tests demonstrated that the display characteristics are equivalent to those of the predicate device.
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.