Hardware · Guides The Materialise PKA Guides are intended to be used as a surgical instrument to assist in the intra-operative positioning of Partial Knee Replacement components and in guiding the marking of bone before cutting and to guide cutting of the bone. The Materialise PKA Guides must be used in conjunction with the compatible prostheses families only: ZUK UNI, JOURNEY™ UNI, JOURNEY II UNI, JZ (Hybrid) UNI knee systems, Vanguard™ M Unicompartmental Knee System, Oxford® Partial Knee System and Persona® Partial Knee System. The Zimmer Biomet Patient Specific Instruments are compatible for use with the Oxford® Partial Knee System as approved in P010014. The Materialise PKA Guides are intended for single use only. ● Models The Materialise PKA Models are intended to be used as a surgical instrument to assist in the intraoperative positioning of Partial Knee Replacement components. The Materialise PKA Models must be used in conjunction with the compatible prostheses families only: ZUK UNI, JOURNEY™ UNI, JOURNEY II UNI, JZ (Hybrid) UNI knee systems, Vanguard™ M Unicompartmental Knee System, Oxford® Partial Knee System and Persona® Partial Knee System. The Zimmer Biomet Patient Specific Instruments are compatible for use with the Oxford® Partial Knee System as approved in P010014. The Materialise PKA Models are intended for single use only. Software The SurqiCase Knee Planner is intended to be used as a pre-surgical planner for knee orthopedic surgery. The software is used to pre-operatively plan the positioning of knee components. The SurgiCase Knee Planner allows the surgeon to visualize, measure, reconstruct, annotate and edit pre-surgical plan data. The software leads to the generation of a surgery report along with a pre-surgical plan data file which is used as input data to design the Materialise Knee Guides and Models.
Device Story
System comprises SurgiCase Knee Planner software and patient-specific hardware (guides/models). Input: patient MRI images. Software allows surgeon to visualize, measure, reconstruct, annotate, and edit pre-surgical plans for partial knee arthroplasty. Output: surgery report and data file used to manufacture patient-specific guides and optional bone models. Guides used intra-operatively by surgeons to position components and mark/cut bone; models serve as visual reference. System facilitates accurate component placement based on patient anatomy. Benefits include improved surgical precision and alignment during partial knee replacement.
Clinical Evidence
Bench testing only. Performance verified via simulated surgeries using rapid-prototyped bone models and previous cadaver testing. Biocompatibility and sterilization re-evaluations performed. Software validation conducted via end-user evaluations.
Technological Characteristics
Patient-specific surgical guides and models. Software-driven planning based on MRI. Materials and design equivalent to predicate. Sterilization via overkill method per ISO 17665-1:2006. Biocompatibility per ISO 10993-1:2008. System is single-use.
Indications for Use
Indicated for patients undergoing partial knee arthroplasty requiring surgical assistance for component positioning and bone cutting. Used in conjunction with specific compatible knee systems: ZUK UNI, JOURNEY UNI, JOURNEY II UNI, JZ (Hybrid) UNI, Vanguard M Unicompartmental, Oxford Partial, and Persona Partial Knee systems.
Regulatory Classification
Identification
A knee joint femorotibial metal/polymer non-constrained cemented prosthesis is a device intended to be implanted to replace part of a knee joint. The device limits minimally (less than normal anatomic constraints) translation in one or more planes. It has no linkage across-the-joint. This generic type of device includes prostheses that have a femoral condylar resurfacing component or components made of alloys, such as cobalt-chromium-molybdenum, and a tibial component or components made of ultra-high molecular weight polyethylene and are intended for use with bone cement (§ 888.3027).
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October 2, 2020
Image /page/0/Picture/1 description: The image shows the logo of the U.S. Food and Drug Administration (FDA). On the left is the Department of Health & Human Services logo. To the right of that is a blue square with the letters "FDA" in white. To the right of the blue square is the text "U.S. FOOD & DRUG ADMINISTRATION" in blue.
Materialise NV Veerle Vanderheyden Regulatory Affairs specialist Technologielaan 15 Leuven, 3001 Belgium
# Re: K202207
Trade/Device Name: Materialise PKA Guide System Regulation Number: 21 CFR 888.3520 Regulation Name: Knee Joint Femorotibial Metal/Polymer Non-Constrained Cemented Prosthesis Regulatory Class: Class II Product Code: HSX, OOG Dated: August 4, 2020 Received: August 6, 2020
# Dear Veerle Vanderheyden:
We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. Although this letter refers to your product as a device, please be aware that some cleared products may instead be combination products. The 510(k) Premarket Notification Database located at https://www.accessdata.fda.gov/scripts/cdrh/cfdocs/cfpmn/pmn.cfm identifies combination product submissions. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part
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801); medical device reporting of medical device-related adverse events) (21 CFR 803) for devices or postmarketing safety reporting (21 CFR 4, Subpart B) for combination products (see https://www.fda.gov/combination-products/guidance-regulatory-information/postmarketing-safety-reportingcombination-products); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (21 CFR Part 820) for devices or current good manufacturing practices (21 CFR 4. Subpart A) for combination products; and, if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 1000-1050.
Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to https://www.fda.gov/medical-device-safety/medical-device-reportingmdr-how-report-medical-device-problems.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/medicaldevices/device-advice-comprehensive-regulatory-assistance) and CDRH Learn (https://www.fda.gov/training-and-continuing-education/cdrh-learn). Additionally, you may contact the Division of Industry and Consumer Education (DICE) to ask a question about a specific regulatory topic. See the DICE website (https://www.fda.gov/medical-device-advice-comprehensive-regulatoryassistance/contact-us-division-industry-and-consumer-education-dice) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone (1-800-638-2041 or 301-796-7100).
Sincerely,
Ting Song, Ph.D., R.A.C. Assistant Director DHT6A: Division of Joint Arthroplasty Devices OHT6: Office of Orthopedic Devices Office of Product Evaluation and Quality Center for Devices and Radiological Health
Enclosure
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# Indications for Use
510(k) Number (if known) K202207
Device Name Materialise PKA Guide System
Indications for Use (Describe) Hardware
· Guides
The Materialise PKA Guides are intended to be used as a surgical instrument to assist in the intra-operative positioning of Partial Knee Replacement components and in guiding the marking of bone before cutting of the bone.
The Materialise PKA Guides must be used in conjunction with the compatible prostheses families only: ZUK UNI. JOURNEY™ UNI, JOURNEY II UNI, JZ (Hybrid) UNI knee systems, Vanguard™ M Unicompartmental Knee System, Oxford® Partial Knee System and Persona® Partial Knee System.
The Zimmer Biomet Patient Specific Instruments are compatible for use with the Oxford® Partial Knee System as approved in P010014.
The Materialise PKA Guides are intended for single use only.
• Models
The Materialise PKA Models are intended to be used as a surgical instrument to assist in the intra-operative positioning of Partial Knee Replacement components.
The Materialise PKA Models must be used in conjunction with the compatible prostheses families only: ZUK UNI, JOURNEY™ UNI, JOURNEY II UNI, JZ (Hybrid) UNI knee systems, Vanguard™ M Unicompartmental Knee System, Oxford® Partial Knee System and Persona® Partial Knee System.
The Zimmer Biomet Patient Specific Instruments are compatible for use with the Oxford® Partial Knee System as approved in P010014.
The Materialise PKA Models are intended for single use only.
Software
The SurgiCase Knee Planner is intended to be used as a pre-surgical planner for knee orthopedic surgery. The software is used to pre-operatively plan the positioning of knee components. The SurgiCase Knee Planner allows the surgeon to visualize, measure, reconstruct, annotate and edit pre-surgical plan data. The generation of a surgery report along with a pre-surgical plan data file which is used as input data to design the Materialise Knee Guides and Models.
Type of Use (Select one or both, as applicable)
> Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (21 CFR 801 Subpart C)
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510(k) Premarket Notification
#### 1 510(k) Summary
The following section is included as required by the Safe Medical Devices Act (SMDA) of 1990 and 21CFR 807.92
| Company name | Materialise N.V. |
|-----------------------------------|-----------------------------------|
| Establishment registration number | 3003998208 |
| Street Address | Technologielaan 15 |
| City | Leuven |
| Postal code | 3001 |
| Country | Belgium |
| Phone number | +32 16 39 62 80 |
| Fax number | +32 16 39 66 06 |
| Principal Contact person | Veerle Vanderheyden |
| Contact title | Regulatory Affairs Specialist |
| Contact e-mail address | Regulatory.Affairs@materialise.be |
| Additional contact person | Brecht Heyde |
| Contact title | Software product manager |
| Contact e-mail address | Brecht.heyde@materialise.be |
### Submission date
The date of the Traditional 510(k) submission is August 4, 2020.
## Submission information
| Device Name | Materialise PKA Guide System |
|--------------------------|--------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|
| Trade Name | Materialise Knee Guides and Models<br>SurgiCase Knee Planner<br>Visionaire UNI Cutting Guides<br>Visionaire UNI Bone Model<br>Signature Guides<br>Zimmer Patient Specific Instruments<br>Zimmer Biomet Patient Specific Instruments. |
| Common Name | 3D planning software and patient specific instrumentation for<br>knee replacement |
| Classification Name | Knee joint patellofemorotibial polymer /metal /polymer semi-<br>constrained cemented prosthesis |
| Primary product code | HSX (21 CFR 888.3520) |
| Subsequent product codes | OOG |
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510(k) Premarket Notification
### Predicate Device
The predicate device to which substantial equivalence is claimed:
| Trade or proprietary or model name | Materialise PKA Guide System |
|------------------------------------|------------------------------|
| 510(k) number | K173970 |
| Decision date | July 6, 2018 |
| Classification product code | HSX (21 CFR 888.3520) |
| Subsequent product codes | OOG |
| Manufacturer | Materialise N.V. |
#### Device Description
The Materialise PKA guide system is a medical device designed to implant a partial knee prosthesis during partial knee arthroplasty surgical procedures.
The device is a system that consists of the following two functional components:
- . A software component, branded as SurgiCase Knee Planner. This software is a planning tool used to generate a pre-surgical PKA plan for a specific patient.
- . A hardware component, branded as Materialise PKA Guides and Models, which are patientspecific guides and models that are based on a pre-surgical plan. This pre-surgical plan is generated using the software component. Materialise PKA Guides and Models is an instrument set containing a femur and/or tibia guide (s) and bone models (optional). Both femoral and tibial guides are designed and manufactured to fit the anatomy of a specific patient. If the surgeon requests it, a bone model of the femur and tibia is delivered with the Materialise PKA Guides. The Materialise PKA Guides and Models assist in the intra-operative positioning of partial knee replacement components. The guides assist in guiding the marking of bone before cutting and cutting of the bone. The models serve as a visual reference for the surgeon in the operating room.
The Materialise PKA Guides and Models must only be used within the intended use of the compatible components (510(k) cleared, legally marketed prosthesis).
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#### 510(k) Premarket Notification
#### Intended Use
#### Hardware
- Guides
The Materialise PKA Guides are intended to be used as a surgical instrument to assist in the intra-operative positioning of Partial Knee Replacement components and in guiding the marking of bone before cutting and to guide cutting of the bone.
The Materialise PKA Guides must be used in conjunction with the compatible prostheses families only: ZUK UNI, JOURNEY™ UNI, JOURNEY II UNI, JZ (Hybrid) UNI knee systems, Vanguard™ M Unicompartmental Knee System, Oxford® Partial Knee System and Persona® Partial Knee System.
The Zimmer Biomet Patient Specific Instruments are compatible for use with the Oxford® Partial Knee System as approved in P010014.
The Materialise PKA Guides are intended for single use only.
#### ● Models
The Materialise PKA Models are intended to be used as a surgical instrument to assist in the intraoperative positioning of Partial Knee Replacement components.
The Materialise PKA Models must be used in conjunction with the compatible prostheses families only: ZUK UNI, JOURNEY™ UNI, JOURNEY II UNI, JZ (Hybrid) UNI knee systems, Vanguard™ M Unicompartmental Knee System, Oxford® Partial Knee System and Persona® Partial Knee System.
The Zimmer Biomet Patient Specific Instruments are compatible for use with the Oxford® Partial Knee System as approved in P010014.
The Materialise PKA Models are intended for single use only.
#### Software
The SurqiCase Knee Planner is intended to be used as a pre-surgical planner for knee orthopedic surgery. The software is used to pre-operatively plan the positioning of knee components. The SurgiCase Knee Planner allows the surgeon to visualize, measure, reconstruct, annotate and edit pre-surgical plan data. The software leads to the generation of a surgery report along with a pre-surgical plan data file which is used as input data to design the Materialise Knee Guides and Models.
#### Functioning of the Device
The Materialise PKA Guide System generates a pre-surgical plan based on MRI images using the SurgiCase Knee Planner. The SurgiCase Knee Planner then is used pre-operatively by a qualified surgeon to inspect, fine-tune and approve the pre-surgical plan. Next, Materialise PKA Guides and Models (models are optional) are designed and manufactured based on the approved pre-surgical plan. Moterialise PKA Guides are patient specific templates which transfer the pre-operatively determined positioning of the chosen partial knee replacement components to the patient intra-operatively, assisting the surgeon in positioning and aligning the actual partial knee replacement components by guiding the marking of bone before cutting and to guide cutting of the bone. The models serve as a visual reference for the surgeon in the operating room.
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### 510(k) Summary
510(k) Premarket Notification
### Technological Characteristics
The Materialise PKA Guide System has an equivalent intended use and the same fundamental scientific technology as the predicate device. The subject device's software is intended simulation and planning of preoperational intervention, and for positioning knee components, i.e. tibia and femur components (same as the predicate device). The subject device's hardware is intended for positioning knee components intra-operatively and in guiding the marking of bone before cutting and to guide cutting of the bone (same as the predicate device).
### Software
The subject software device employs similar fundamental technologies as the predicate software device. Technological similarities include:
- . Device functionality: The planning functionality, visualization options and planning features are the same for the knee planning of the subject device as for the predicate device.
- o Software technology: The subject device has the same code base as the predicate device and uses exactly the same methods for design and verification and validation as the predicate device.
Following technological differences exist between the subject device software and the predicate device software:
- The main difference between the subject device and previously cleared predicate device K173970 is the addition of the Persona® Partial Knee (PPK) implants and instruments in the software component of the subject device for the surgeon to select during the planning stage.
The subject software technology differences have been demonstrated to not affectiveness or raise new issues of safety or effectiveness compared to the predicate device.
### Hardware
The subject hardware device is substantially equivalent in intended use, design, functionality, operating principles, materials and performance characteristics to the predicate device.
The main difference between the subject device and previously cleared predicate device K173970 include:
- The addition of Materialise PKA Guides and Models that are compatible with the Persona® Partial Knee (PPK) system. This resulted in the update of non-critical features of the PKA tibia guide that will be used for this system.
### Performance Data (non-clinical)
### Hardware
Previous testing for cleaning, debris, dimensional stability and packaging are applicable to the subject device and demonstrate substantial equivalence with the predicate device. Testing verified that the accuracy and performance of the system is adequate to perform as intended. The stability of the device placement, surgical technique, intended use and functional elements of the subject device are similar as that of the predicate device, and therefore previous simulated surgeries using rapid prototyped bone models and previous cadaver testing are considered applicable to the subject device.
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### K202207 Page 5 of 5
### Materialise PKA Guide System
#### 510(k) Summary
#### 510(k) Premarket Notification
Although no additional tests in comparison with the predicate device testing were required to support substantial equivalence, new biocompatibility and sterilization testing has been done for other reasons as explained in section below.
- -Biocompatibility re-evaluation according to the new ISO 10993-1:2008 was done. The subject device was shown to be non-cytotoxic, non-sensitizing, non-irritant, non-systematically toxic (acute) and nonpyrogenic.
- Sterilization re-evaluation using an overkill method partial cycle in accordance with ISO 17665-1:2006 on a new worst case design. All samples passed the sterilization the applied sterilization parameters for the subject device.
### Software
New software validation/verification testing of the SurgiCase Knee Planner was done in support of this premarket notification in the form of end-user evaluations.
### Summary
The non-clinical performance testing indicates that the subject device is as safe, as effective, and performs as well as the predicate device. Therefore it can be concluded that the Materialise PKA Guide System is substantial equivalent to the predicate device. The Materialise PKA Guide System will be manufactured in compliance with FDA (CFR 820 & Part 11) and ISO quality system (13485) requirements.
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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
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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.
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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.
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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.
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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.
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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.
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.