The RadiForce RX840 is intended to be used in displaying and viewing digital images for diagnosis of X-ray or MRI, etc. by trained medical practitioners. The device does not support the display of mammography images for diagnosis.
Device Story
RadiForce RX840 is an 8MP color LCD monitor for viewing medical images (X-ray, MRI). Input via DVI or DisplayPort; transforms digital signals into high-resolution (4096 x 2160) visual output using LED backlight technology. Operated by medical practitioners in clinical settings. Features include factory-calibrated lookup tables for DICOM GSDF compliance, a Built-in Front Sensor (IFS) for automatic grayscale calibration, a Presence Sensor (PS) for power management, and an Ambient Light Sensor (ALS). RadiCS software provides quality control and maintenance. Higher luminance and pixel density compared to predicate; LED backlight offers improved longevity and power efficiency. Output assists clinicians in diagnostic interpretation of radiological images.
Clinical Evidence
Bench testing only. Performance compared against predicate device regarding image quality characteristics, luminance, and calibration accuracy. IFS calibration accuracy validated against external sensors. No clinical data presented.
Technological Characteristics
8MP color LCD monitor (4096 x 2160 resolution); LED backlight; DVI and DisplayPort interfaces. Includes Built-in Front Sensor (IFS) for automatic grayscale calibration, Presence Sensor (PS), and Ambient Light Sensor (ALS). Factory-calibrated lookup tables for DICOM GSDF compliance. RadiCS software for quality control.
Indications for Use
Indicated for trained medical practitioners to display and view digital images for diagnosis of X-ray or MRI. Not indicated for mammography image diagnosis.
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/0 description: The image shows the logo for EIZO. The logo consists of a stylized square shape with a checkered pattern in the upper right corner. The word "EIZO" is written in bold letters below the square.
K113226
DEC 1 7 2011
EIZO NANAO CORPORATION, 153 Shimokashiwano, Hakusan, Ishikawa
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
| Name | Hiroaki Hashimoto |
|------------|--------------------------|
| Department | Medical Device Standards |
| Telephone | +81 (76) 274-2468 |
| Fax | +81 (76) 274-2484 |
| E-Mail | hiro@nanao.co.jp |
| Date | October 28th, 2011 |
# Traditional 510(k) Summary (in accordance with 21 CFR 807.92)
- 1. Date of Summary
October 28th, 2011
- 2. Company EIZO NANAO CORPORATION 153 Shimokashiwano, Hakusan Ishikawa 924-8566 Japan
- 3. Authorized Contact Person Hiroaki Hashimoto
### 4. Device Information
- Trade Name/Model: . RadiForce RX840
- Common Name: . 8MP Color LCD Monitor
- Classification Name: . System, Image Processing, Radiological
- . Classification Number: 21 CFR 892.2050, Product Code LLZ
#### 5. Predicate Device
- Color LCD Monitor, FlexScan MX300W (K073340) .
### 6. Device Description
The RadiForce RX840 is a color LCD monitor for viewing medical images other than those of mammography. The matrix size (or resolution) of the panel is 4096 x 2160 pixels (8MP), spacious enough to display e.g. two 3MP radiological images and other clinical information side by side without obtrusive bezels.
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.
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Model variations with cosmetic differences are distinguished by characters attached to the name of the base model "RX840" such as "RX840-AR", a model with an Anti-Reflective coating.
RadiCS is application software to be installed in each workstation offering worry-free quality control of the diagnostic monitors including RX840 based on several QC guidelines. The RadiCS and its subset, RadiCS LE are included in this 510(k) submission as an accessory to the RadiForce RX840.
## 7. Intended Use
The RadiForce RX840 is intended to be used in displaying and viewing digital images for diagnosis of X-ray or MRI, etc. by trained medical practitioners. The device does not support the display of mammography images for diagnosis.
## 8. Technological Characteristics
The RadiForce RX840 can be said to have at least the same display performances as those of the predicate device by default due to the following reasons:
- Both the matrix size and the active area size of the LCD panel used (4,096 x 2,160, a. 817.1 mm x 430.9 mm) are larger than those of the predicate device (2,560 x 1,600, 641.3 mm x 400.8 mm).
- The smaller pixel pitch or pixel size (0.1995 x 0.1995 mm) than that of the predicate b. device (0.2505 x 0.2505 mm) means higher density usually resulting in higher quality of displayed images. If one cares about the smaller pixel size, the perceived pixel size similar to that of the predicate device can be realized easily by adjusting the viewing distance.
- The DICOM calibrated luminance (400 cd/m²) and the typical maximum luminance C. (700 cd/m2) is higher than that of the predicate device (170 cd/m², 300 cd/m²). The higher luminance to be maintained constantly was realized by the employment of LED backlight deteriorating more slowly than conventional CCFL backlights.
- d. The LED backlight was newly employed instead of CCFL backlight because it is mercury-free, consumes less power and deteriorates more slowly. We have not recognized any adverse effects of the LED backlight on the quality of displayed images. Refer to section 18 "Performance Testing - Bench" where several image quality characteristics of the proposed device are compared with those of the predicate device.
- The both devices display images in accordance with DICOM GSDF by default e. utilizing the factory calibrated display mode stored in lookup tables inside of them.
- As for input video signal, in addition to the Digital Visual Interface (DVI) also f. supported by the predicate device, RadiForce RX840 supports DisplayPort, another type of digital video interface based on an industrial standard. As far as the both the DVI and the DisplayPort are digital, their differences do not affect the quality of displayed images.
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As for the maintenance, the same QC software is used for the both devices and the implementation of the Backlight Sensor (BS) stabilizing the backlight is also the same.
As for built-in sensors, in addition to BS common to the both devices, RX840 has three kinds of sensors. However, only the Built-in Front Sensor (IFS) has something to do with the maintenance or the calibration; the Presence Sensor (PS) detects the absence of the user to trigger the power saving mode of the monitor and the Ambient Light Sensor (ALS) is used to measure the ambient light by lx. The IFS enables automatic grayscale calibration by measuring the luminance at the screen surface. Without IFS, the grayscale calibration process requires human intervention and the use of an external sensor. The accuracy data of the calibration with external sensors and that with the IFS is included in section 16.9 "Verification and Validation Documentation".
The overall design of the RadiForce RX840 was validated in accordance with internationally recognized safety and EMC standards by independent testing facilities and in-house ones. Besides, EIZO NANAO CORPORATION performed a range of system and performance tests to ensure that the RadiForce RX840 performs in accordance with its specifications. None of the tests revealed behaviors inconsistent with the expected performance.
## 9. Conclusion
The 8MP color LCD monitor, RadiForce RX840 is substantially equivalent to the predicate device with respect to technical characteristics, application and intended use. The specifications of the primary component employed by the proposed device are superior to those of the predicate device and other differences have been independently validated. Any differences between the devices do not affect safety or effectiveness.
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Image /page/3/Picture/0 description: The image is a black and white seal for the Department of Health & Human Services USA. The seal is circular, with the text "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" arranged around the top half of the circle. In the center of the seal is a stylized image of an eagle with its wings spread, with three lines representing the eagle's body.
#### DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration 10903 New Hampshire Avenue Document Control Room - WO66-G609 Silver Spring, MD 20993-0002
Mr. Hiroaki Hashimoto Manager EIZO NANAO Corporation 153 Shimokashiwano 924-8566 HAKUSAN ISHIKAWA JAPAN
DEC 1 7 2011
Re: K113226
Trade/Device Name: 8MP Color LCD Monitor, RadiForce RX840 Regulation Number: 21 CFR 892.2050 Regulation Name: Picture archiving and communications system Regulatory Class: II Product Code: LLZ Dated: October 31, 2011 Received: November 1, 2011
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.
If your device is classified (see above) into class II (Special Controls), it may be subject to such additional controls. Existing major regulations affecting your device can be found in Title 21, Code of Federal Regulations (CFR), Parts 800 to 895. 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 Parts 801 and 809); medical device reporting of
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medical device-related adverse events) (21 CFR 803); and good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820). This letter will allow you to begin marketing your device as described in your Section 510(k) premarket notification. The FDA finding of substantial equivalence of your device to a legally marketed predicate device results in a classification for your device and thus, permits your device to proceed to the market.
If you desire specific advice for your device on our labeling regulation (21 CFR Parts 801 and 809), please contact the Office of In Vitro Diagnostic Device Evaluation and Safety at (301) 796-5450. 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 Small Manufacturers, International and Consumer Assistance at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely Yours,
Mary Pastel
Mary S. Pastel, Sc.D. Director Division of Radiological Devices Office of In Vitro Diagnostic Device Evaluation and Safety Center for Devices and Radiological Health
Enclosure
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#### Indications for Use Form
510(k) Number (if known): _K (ﺻﺎﺩ 3222
8MP Color LCD Monitor, RadiForce RX840 Device Name:
Indications for Use:
The RadiForce RX840 is intended to be used in displaying and viewing digital images for diagnosis of X-ray or MRI, etc. by trained medical practitioners. The device does not support the display of mammography images for diagnosis.
Prescription Use _____________________________________________________________________________________________________________________________________________________________ (21 CFR 801 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE-CONTINUE ON ANOTHER PAGE OF NEEDED)
Concurrence of CDRH, Office of In Vitro Diagnostic Devices (OIVD)
Mictael D. Kher
Office of In Vitro Diagnostic Device Evaluation and Safety
510(k) K113224
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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.