The Joint Motion Devices are an accessory to MRI diagnostic devices, including the Hitachi AIRIS™, Siemens Magnatom™, Toshiba OPART™ Picker Outlook™, Fonar, and GE Medical Systems Open MRI systems. In addition, the devices may be used in any MRI system where the physical limits of the bore size is not a constraint. The devices are built from plastics and nonferromagnetic materials, and hold patients securely during MRI imaging sequences. The devices also constrain joint motion to one of several user-designated planes of rotation, dependant upon the joint to be imaged, and emulate the natural motion of the joint. The Joint Motion Devices increase the clinical utility of MRI systems to provide high quality, repeatable imaging and constraint for the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies to enable fixed position imaging, and kinematic (incremental stepped) motion of the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies, and dynamic (continuous) motion of the knee, cervical spine, ankle, wrist , lumbar spine, hip and shoulder joint anatomies. The devices will enable the physician to evaluate the anatomy of the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies, in a static mode as well as to evaluate the dynamic interaction of the different tissues (ligaments, cartilage, bone, muscle, fat). Such functional interaction may be useful in diagnosis. The intended patients are primarily drawn from a pool of those subjects undergoing diagnostic evaluation by physicians who are skilled in diagnosis and treatment of the disease process(es) under consideration.
Device Story
Joint Motion Devices are non-ferromagnetic, plastic accessories for MRI systems; designed to hold patients securely during imaging. Devices provide constraint for knee, cervical spine, ankle, wrist, lumbar spine, hip, and shoulder; enabling fixed-position, kinematic (incremental), or dynamic (continuous) motion during scans. Operated manually by clinicians in MRI suites; no motors or active components. By emulating natural joint motion, devices allow physicians to evaluate dynamic tissue interactions (ligaments, cartilage, bone, muscle, fat) in addition to static anatomy. Output is high-quality, repeatable MRI imagery used to inform clinical diagnosis of joint-related disease processes.
Clinical Evidence
Bench testing only. Testing confirmed form, fit, function, and that the devices do not adversely affect the magnetic field for imaging.
Technological Characteristics
Manually operated, non-ferromagnetic plastic joint positioning accessories. No active components (motors) or ferromagnetic materials. Designed for use with open MRI systems and high-tesla magnets where bore size permits. Standalone mechanical devices.
Indications for Use
Indicated for patients undergoing MRI diagnostic evaluation of the knee, cervical spine, ankle, wrist, lumbar spine, hip, or shoulder. Used to provide fixed-position, kinematic (stepped), or dynamic (continuous) imaging of joint tissues (ligaments, cartilage, bone, muscle, fat) to assist physicians in diagnosing functional interactions. No specific age or gender contraindications stated.
Regulatory Classification
Identification
A magnetic resonance diagnostic device is intended for general diagnostic use to present images which reflect the spatial distribution and/or magnetic resonance spectra which reflect frequency and distribution of nuclei exhibiting nuclear magnetic resonance. Other physical parameters derived from the images and/or spectra may also be produced. The device includes hydrogen-1 (proton) imaging, sodium-23 imaging, hydrogen-1 spectroscopy, phosphorus-31 spectroscopy, and chemical shift imaging (preserving simultaneous frequency and spatial information).
Special Controls
*Classification.* Class II (special controls). A magnetic resonance imaging disposable kit intended for use with a magnetic resonance diagnostic device only is exempt from the premarket notification procedures in subpart E of part 807 of this chapter subject to the limitations in § 892.9.
{0}------------------------------------------------
OCT 22 1998
. . . . . . . .
Image /page/0/Picture/1 description: The image shows the word "CHAMCO" in a bold, serif font, with a five-pointed star above the letters "HA". To the right of the word "CHAMCO" is the abbreviation "INC.", which is smaller than the main word. The star is black and solid, and the letters are also black. The overall design is simple and corporate.
American Made Medical Products
# 510(k) Summary
长982761
# 1. Submitter Information
CHAMCO, Inc. 1.1 Submitter: 798 Clearlake Road Cocoa, Fl 32922 Owner/operator number: 9034336 David P Salvadorini 1.2 Contact: PH: 407-774-4488 FX: 407-774-0599 email: dsalvadorini@compuserve.com
- August 4, 1998 1.3 Date:
# 2.0 Device Name
| 2.1 | Classification Panel: | Radiology |
|-----|-----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------|-----------------------------------------------------------------------|
| 2.2 | Classification Number: | 892.100 Magnetic Resonance Diagnostic Device |
| 2.3 | Product Number: | 90LNH |
| 2.4 | Product Nomenclature: | System, Nuclear Magnetic Resonance Imaging, Accessory |
| 2.5 | Device Classification: | II |
| 2.6 | Performance Standards: | None established under section 514 of the Food, Drug and Cosmetic Act |
| 2.7 | Trade Name: | Joint Motion Devices |
| | 2.7.2 Knee/Cervical Joint Motion Device<br>2.7.3 Lumbar Joint Motion Device<br>2.7.4 Wrist Joint Motion Device<br>2.7.5 Ankle Joint Motion Device<br>2.7.6 Shoulder Joint Motion Device | P/N 1026<br>P/N 1027<br>P/N 1028<br>P/N 1029<br>P/N 1030 |
798 Clearlake Road • Cocoa, Florida 32922 • Phone 407.6.39.3314 • Fax 407.6.39.877.4
E -
{1}------------------------------------------------
| 2.7.7 Hip Joint Motion Device | P/N 1031 |
|------------------------------------|----------|
| 2.7.8 Joint Motion Device Package* | P/N 1032 |
| 2.7.9 Storage Cabinet | P/N 1033 |
*Includes all devices plus the storage cabinet
#### 3.0 Predicate Device
3.2
- 3.1 K953918
Hitachi Medical Systems America, Inc. Manufactured by CHAMCO. Inc.
- 3.3 Sept. 12, 1995
- 3.4 Regulatory Class II
- 3.5 21 CFR 892.1000/Procode: 90LNH
Joint Motion Devices
- These devices are identical to the predicate device. CHAMCO and Hitachi 3.6 Medical Systems America, developed these devices together. CHAMCO has been the only manufacturer of these devices. CHAMCO intends to market these devices under its own name, and has adequate information demonstrating its legal right to distribute these devices.
#### 4.0 Device Description
- 4.1 Function
The Joint Motion Devices provide constraint for the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies to enable fixed position imaging, and kinematic (incremental stepped) motion of the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies, and dynamic (continuous) motion of the knee, cervical spine, ankle, wrist , lumbar spine, hip and shoulder joint anatomies. Form, fit and function, as well as a determination that the devices do not adversely affect the magnetic field for imaging has been tested.
The Joint Motion Devices add clinical utility to all known open MRI diagnostic devices, including the Hitachi AIRISTM, Siemens Magnatom™, Toshiba OPART™, and Picker, Fonar, Phillips and GE Medical Systems Open MRI systems. In addition, several of the devices have use in higher tesla magnets where bore size is not a constraint.
- 4.2 Scientific Concepts
Identical to the predicate device
{2}------------------------------------------------
### 4.3 Physical and Performance Characteristics
Identical to the predicate device
#### 5.0 Device Intended Use
Identical to the predicate devices will enable the physician to evaluate the anatomy of the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies, in a static mode as well as to evaluate the dynamic interaction of the different tissues (ligaments, cartilage, bone, muscle, fat). Such functional interaction may be useful in diagnosis.
### 6.0 Technological Characteristics
Identical to the predicate device. The devices are manually operated by the user. No active components (i.e. motors) are used and there are no ferromagnetic materials that could affect the scan field.
{3}------------------------------------------------
Image /page/3/Picture/16 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo is a circular seal with the words "DEPARTMENT OF HEALTH & HUMAN SERVICES · USA" around the perimeter. Inside the circle is an abstract image of a stylized caduceus, which is a symbol of medicine and healing. The caduceus is composed of three human profiles.
Food and Drug Administration 9200 Corporate Boulevard Rockville MD 20850
OCT 2 2 1998
David P. Salvadorini Director of Marketing Chamco. Inc. 798 Clearlake Road Cocoa, FL 32714
Re:
K982761 Joint Motion Devices Package for MRI Dated: August 4, 1998 Received: August 6, 1998 Regulatory class: II 21 CFR 892.1000/Procode: 90 LNH
Dear Mr. Salvadorini:
We have reviewed your Section 510(k) notification of intent to market the device referenced above and we have determined the device is substantially equivalent (for the indications for-use stated in the enclosure) to 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). 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 (Premarket Approval), 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 895. A substantially equivalent determination assumes compliance with the Current Good Manufacturing Practice requirements, as set forth in the Ouality System Regulation (QS) for Medical Devices: General regulation (21 CFR Part 820) and that, through periodic OS inspections, the Food and Drug Administration (FDA) will verify such assumptions. Failure to comply with the GMP regulation may result in regulatory action. In addition, FDA may publish further announcements concerning your device in the Federal Register. Please note: this response to your premarket notification submission does not affect any obligation you might have under sections 531 through 542 of the Act for devices under the Electronic Product Radiation Control provisions, or other Federal laws or regulations.
This letter will allow you to begin marketing your device as described in your 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 and additionally 809.10 for in vitro diagnostic devices), please contact the Office of Compliance at (301) 594-4613. Additionally, for questions on the promotion and advertising of your device; please contact the Office of Compliance at (301) 594-4639. Also, please mote the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR 807.97). Other general information on your responsibilities under the Act may be obtained from the Division of Small Manufacturers Assistance at its toll-free number (800) 638-2041 or (301) 443-6597 or at its Internet address "http://www.fda.gov/cdrh/dsmaldsmamain.html",
Sincerely yours,
William Yip
Lillian Yin, Ph.D. Director, Division of Reproductive Abdominal, Ear, Nose and Throa and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
{4}------------------------------------------------
| Ver/3- 4/24/96 | Indications for Use Statement | |
|-----------------|------------------------------------|----------|
| Applicant: | CHAMCO, Inc. | |
| | 798 Clearlake Road | |
| | Cocoa, Fl 32922 | |
| | Owner/operator number: 9034336 | |
| | David P Salvadorini | |
| | PH: 407-774-4488 | |
| | FX: 407-774-0599 | |
| | email: dsalvadorini@compuserve.com | |
| 510 (k) Number: | K982761 | |
| Device Name: | Joint Motion Device | |
| | Knee/Cervical Joint Motion Device | P/N 1026 |
| | Lumbar Joint Motion Device | P/N 1027 |
| | Wrist Joint Motion Device | P/N 1028 |
| | Ankle Joint Motion Device | P/N 1029 |
| | Shoulder Joint Motion Device | P/N 1030 |
| | Hip Joint Motion Device | P/N 1031 |
| | Joint Motion Device Package* | P/N 1032 |
| | Storage Cabinet | P/N 1033 |
*Includes all devices plus the storage cabinet
Indications for Use:
The Joint Motion Devices are an accessory to MRI diagnostic devices, including the Hitachi AIRIS™, Siemens Magnatom™, Toshiba OPART™ Picker Outlook™, Fonar, and GE Medical Systems Open MRI systems. In addition, the devices may be used in any MRI system where the physical limits of the bore size is not a constraint.
The devices are built from plastics and nonferromagnetic materials, and hold patients securely during MRI imaging sequences. The devices also constrain joint motion to one of several user-designated planes of rotation, dependant upon the joint to be imaged, and emulate the natural motion of the joint.
The Joint Motion Devices increase the clinical utility of MRI systems to provide high quality, repeatable imaging and constraint for the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies to enable fixed position imaging, and kinematic (incremental stepped) motion of the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies, and
{5}------------------------------------------------
dynamic (continuous) motion of the knee, cervical spine, ankle, wrist , lumbar spine, hip and shoulder joint anatomies.
The devices will enable the physician to evaluate the anatomy of the knee, cervical spine, ankle, wrist, lumbar spine, hip and shoulder anatomies, in a static mode as well as to evaluate the dynamic interaction of the different tissues (ligaments, cartilage, bone, muscle, fat). Such functional interaction may be useful in diagnosis.
The intended patients are primarily drawn from a pool of those subjects undergoing diagnostic evaluation by physicians who are skilled in diagnosis and treatment of the disease process(es) under consideration.
David C. Bergman
(Division Sign-Off) Division of Reproductive, Abdominal, ENT, and Radiological Devi 510(k) Number
Concurrence of CDRH, Office of Device Evaluation, (ODE)
Prescription use
(Per 21 CFR 801.109) (Optional Format 1-2-96)
D-2
Predicate graph will load when search results are available.
Embedding visualization will load when search results are available.
PDF viewer will load when search results are available.
Loading panels...
Select an item from Submissions
Click any panel, subpart, regulation, product code, or device to see details here.
Section Matches
Results will appear here.
Product Code Matches
Results will appear here.
Special Control Matches
Results will appear here.
Loading collections...
Loading
My Alerts
You will receive email notifications based on the filters and frequency you set for each alert.
Sort by:
Create Alert
Search Filters
Agent Token
Create a read-only bearer token for Claude, ChatGPT, or other agents that can call HTTP APIs.
Copy this now. It will not be shown again.
Connected apps
Apps you authorized through browser sign-in. Disconnecting revokes their access immediately.
Learn the FDA Browser
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.