The Oncentra RT Viewer is intended to be used for review and evaluation of DICOM based patient data by qualified specialists. It is used to load and display data generated by different DICOM modalities including, but not limited to: RT Image, RT Structure Set, RT Plan, RT Dose, CT, CR, MR, and PET. It provides the user with a wide range of tools to compile, compare, and manipulate views and images. It enables super-positioning of geometrically related DICOM data.
Device Story
Oncentra RT Viewer 1.0 is a software-based tool for radiation therapy planning review. It ingests DICOM-formatted patient data, including RT images, structure sets, plans, dose distributions, and diagnostic imaging (CT, MR, PET). The device functions as a read-only viewer, enabling qualified specialists to visualize, superimpose, and compare treatment plans and dose distributions. Key features include side-by-side plan comparison, dose summation, and Dose-Volume Histogram (DVH) analysis (individual and total modes). The software operates on Windows XP or VISTA platforms. By facilitating the review of treatment plans and dose statistics, the device assists clinicians in evaluating radiation therapy strategies. It does not modify original study data.
Clinical Evidence
No clinical data provided; bench testing only.
Technological Characteristics
Software-based viewer for DICOM data. Operates on Windows XP or VISTA platforms. Features include image display, super-positioning of geometrically related data, DVH calculation, and dose summation. Read-only functionality; no data modification.
Indications for Use
Indicated for review and evaluation of DICOM-based patient data (RT Image, RT Structure Set, RT Plan, RT Dose, CT, CR, MR, PET) by qualified specialists in a clinical setting.
Regulatory Classification
Identification
A medical charged-particle radiation therapy system is a device that produces by acceleration high energy charged particles (e.g., electrons and protons) intended for use in radiation therapy. This generic type of device may include signal analysis and display equipment, patient and equipment supports, treatment planning computer programs, component parts, and accessories.
Predicate Devices
MasterPlan 3 (K08128)
Submission Summary (Full Text)
{0}------------------------------------------------
K0r2642
510(k) Nucletron Oncentra RT Viewer 1.0
tron
Page 29 July 2008
NOV - 7 2008 NUCLETRON B.V. Waardgelder 1 3905 THI Veenendaal P.O.Box 930 3900 AX Veenendaal The Netherlands Phone +31 318 557133 +31 318 550485 Fax
Department of Health and Human Services Centre of Device and Radiological Health Office of Device Evaluation Traditional 510(k) section
# 510(K) SUMMARY OF SAFETY AND EFFECTIVENESS INFORMATION as required by section 807.92(c)
## Submitter of 510(k):
Company name: Registration number: Address:
Phone: Fax: Correspondent: Nucletron Corporation 1121753 8671 Robert Fulton Drive Columbia, MD 21046 410-312-4100 410-312-4197 Lisa Dimmick Director Assurance & Regulatory Affairs
## New Device Name:
Trade/Proprietary Name: Oncentra RT Viewer 1.0. Common/Usual Name: Radiation Therapy Viewer System, Planning, Radiation Therapy Treatment Classification Name: Classification: 21Cfr892.5050 Class II
#### Legally Marketed Device(s)
Our new device is based on the legally marketed device cited in the table below:
| Manufacturer | Device<br>CALL CAL DECRECT SECTION COLLEGION TO SECTION OF THE SULL COLLEGION OF THE SULL | 510(k)<br>4 |
|----------------------------------------------------------------------------------------|--------------------------------------------------------------------------------------------------|---------------------------------------------------------------------------------------------------------|
| Nucletron BV | MasterPlan 3 | K08128 |
| a way age with a feature of the count of the count of the count of the contribute with | annones in experience anyments of the collection of the collection and first and any for any and | Comments of NY 1 UP P.A. F. angere turns of many and experience with the more of the first would be and |
{1}------------------------------------------------
# 510(k)
## Nucletron Oncentra RT Viewer 1.0
## Description:
RT Viewer provides tools for analysis of single and summed plans, and for comparison of several alternative plans. All image series and all RT objects (Structure Set, Plans, RT Images and Dose) in the study can be displayed and explored.
RT Viewer is principally a read-only activity and produces no new data or modifications to the data for the study and the plan(s).
# Single Plan Evaluation
- Display of plan dose in original, reconstructed planar and 3D images. .
- . Display of dose as a sequence of objects,
- ♥ Inspection and comparison of individual objects for a plan in a study.
- . Display of DVH in individual and total mode to view contributions from total plan or individual beams.
- Display of DVH statistics. .
#### Plan Comparison
- Side-by-side display of a plan for selected plans in a study, shown as a sequence of objects. .
- . Comparison of DVH and dose statistics for plans in a study.
#### Plan Summation
- Summation of dose distributions for plans and display of summed dose. ●
- Display of DVH in individual and total mode to view contributions from summed or ◆ individual plans.
The software runs on a Windows XP or VISTA platform.
#### Intended use:
The Oncentra RT Viewer is intended to be used for review and evaluation of DICOM based patient data by qualified specialists. It is used to load and display data generated by different DICOM modalities including, but not limited to: RT Image, RT Structure Set, RT Plan, RT Dose, CT. CR. MR. and PET.
It provides the user with a wide range of tools to compile, compare, and manipulate views and images. It enables super-positioning of geometrically related DICOM data.
#### Summary of technological considerations:
Oncentra RT Viewer 1.0 is substantially equivalent to the cleared predicate device. The cleared predicate device, Oncentra MasterPlan 3.1, has a wide intended use than the new device Oncentra RT Viewer 1.0 which is merely a viewer.
ay
Name: Paul Van den Biggelaar Title: Director Oncentra Nucletron B.V. Veenendaal, The Netherlands
2009.02.08
Date
Page 5 July 2008
{2}------------------------------------------------
Image /page/2/Picture/0 description: The image shows the seal of the Department of Health & Human Services (HHS) of the United States of America. The seal features a stylized eagle with its wings spread, symbolizing protection and service. The words "DEPARTMENT OF HEALTH & HUMAN SERVICES • USA" are arranged in a circular pattern around the eagle, indicating the department's name and national affiliation.
# DEPARTMENT OF HEALTH & HUMAN SERVICES
Public Health Service
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
# NOV - 7 2008
Nucletron Corporation % Mr. Daniel W. Lehtonen Senior Staff Engineer - Medical Devices Intertek Testing Services 2307 E. Aurora Rd., Unit B7 TWINSBURG OH 44087
Re: K082642
Trade/Device Name: Oncentra RT Viewer 1.0. Regulation Number: 21 CFR 892.5050 Regulation Name: Medical charged-particle radiation therapy system Regulatory Class: II Product Code: MUJ Dated: October 27, 2008 Received: October 28, 2008
Dear Mr. Lehtonen:
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 either class II (Special Controls) or class III (PMA), it may be subject to such 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.
{3}------------------------------------------------
# Page 2
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); good manufacturing practice requirements as set forth in the quality systems (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.
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 Part 801), please contact the Office of Compliance at one of the following numbers, based on the regulation number at the top of this letter:
| 21 CFR 876.xxx | (Gastroenterology/Renal/Urology) | 240-276-0115 |
|----------------|----------------------------------|--------------|
| 21 CFR 884.xxx | (Obstetrics/Gynecology) | 240-276-0115 |
| 21 CFR 894.xxx | (Radiology) | 240-276-0120 |
| Other | | 240-276-0100 |
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Part 807.97). For questions regarding postmarket surveillance, please contact CDRH's Office of Surveillance and Biometrics' (OSB's) Division of Postmarket Surveillance at 240-276-3474. For questions regarding the reporting of device adverse events (Medical Device Reporting (MDR)), please contact the Division of Surveillance Systems at 240-276-3464. 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 (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely vours.
Jaque M. Zhang
Joyce M. Whang, Ph.D. Acting Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
510(k) Nucletron Oncentra RT Viewer 1.0
Page 31 July 2008
# Indications for Use Statement
510(k) Number
Device Name
Indications for Use
ﺎ ﺍﻟﻤﺴﺘﻘﻠﺔ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟﻤﺘﺤﺪﺓ ﺍﻟ
":
1 ...... -
ﻠ .
1.11
K082642
Oncentra RT Viewer 1.0.
The Oncentra RT Viewer is intended to be used for review and evaluation of DICOM based patient data by qualified specialists. It is used to load and display data generated by different DICOM modalities including, but not limited to: RT Image, RT Structure Set, RT Plan, RT Dose, CT, CR, MR, and PET.
It provides the user with a wide range of tools to compile, compare, and manipulate views and images. It enables super-positioning of geometrically related DICOM data.
Prescription Use __ X (Part 21 CFR 801 subpart D)
AND/OR
Over-The-Counter Use (Part 21 CFR 801 subpart C)
# PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED
#### Concurrence of CDRH, Office of Device Evaluation (ODE)
Julin Remen
(Division Sign-Off) Division of Reproductive, Abdominal, and Radiological Device 510(k) Number _
Page 1 of 1
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.