K142755 · Resonance Innovations, LLC · MOS · Oct 23, 2014 · Radiology
Device Facts
Record ID
K142755
Device Name
Siemens 3.0 Blanket Array Coil
Applicant
Resonance Innovations, LLC
Product Code
MOS · Radiology
Decision Date
Oct 23, 2014
Decision
SESE
Submission Type
Traditional
Regulation
21 CFR 892.1000
Device Class
Class 2
Indications for Use
The coil is indicated for use by the order of a physician to be used as an accessory to a Siemens 3.0T magnetic resonance scanner for general human anatomy imaging as supported by the scanner. These images, when interpreted by a trained physician, may assist in medical diagnosis.
Device Story
Siemens 3.0T Blanket Array Coil; flexible, quilt-like MRI antenna array; wraps around small bodies and adult extremities (e.g., bilateral brachial plexus, lower extremities, heads). Input: magnetic resonance signals received during MRI scanning. Operation: receive-only multi-channel coil; works with system body coil; uses blocking networks and impedance matching circuits; no energy transmitted into patient. Output: raw signal data processed by MRI scanner into diagnostic images. Used in clinical MRI suites; operated by MRI technicians/radiologists. Benefit: facilitates accurate positioning; improves patient comfort via lightweight, flexible design; provides high-quality diagnostic images.
Clinical Evidence
No clinical data. Bench testing only. Performance demonstrated via SNR and uniformity analysis, blocking network analysis, and imaging in three planes (sagittal, coronal, axial) to compare with predicate coil performance.
Technological Characteristics
Multi-channel, receive-only MRI coil. Materials: internal circuitry encapsulated in flame retardant EVA foam, covered with nylon fabric or compressed EVA. Dimensions: flexible blanket form factor. Connectivity: interfaces with Siemens 3.0T MRI scanner. Energy: passive (no internal power source). Safety standards: IEC60601-1 3rd Edition (equivalent to ES60601-1).
Indications for Use
Indicated for general human anatomy imaging as an accessory to a Siemens 3.0T MRI scanner; for use by physician order; images interpreted by trained physicians to assist in diagnosis.
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.
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Food and Drug Administration 10903 New Hampshire Avenue Document Control Center - WO66-G609 Silver Spring, MD 20993-0002
December 2, 2014
Resonance Innovations LLC % Mr. Brian Carter Quality Assurance Manager 9840 S. 140th Street, Suite 8 OMAHA NE 68138
Re: K142755
Trade/Device Name: Siemens 3.0T Blanket Array Coil Regulation Number: 21 CFR 892.1000 Regulation Name: Magnetic resonance diagnostic device Regulatory Class: II Product Code: MOS Dated: September 24, 2014 Received: September 25, 2014
Dear Mr. Carter:
This letter corrects our substantially equivalent letter of October 23, 2014. We have reviewed your Section 510(k) premarket notification of intent to market the device referenced above and have determined the device is substantially equivalent (for the indications for use stated in the enclosure) to legally marketed predicate devices marketed in interstate commerce prior to May 28, 1976, the enactment date of the Medical Device Amendments, or to devices that have been reclassified in accordance with the provisions of the Federal Food, Drug, and Cosmetic Act (Act) that do not require approval of a premarket approval application (PMA). You may, therefore, market the device, subject to the general controls provisions of the Act. The general controls provisions of the Act include requirements for annual registration, listing of devices, good manufacturing practice, labeling, and prohibitions against misbranding and adulteration. Please note: CDRH does not evaluate information related to contract liability warranties. We remind you, however, that device labeling must be truthful and not misleading.
If your device is classified (see above) into either class II (Special Controls) or class III (PMA), it may be subject to additional controls. Existing major regulations affecting your device can be found in the Code of Federal Regulations, Title 21, Parts 800 to 898. In addition, FDA may publish further announcements concerning your device in the Federal Register.
Please be advised that FDA's issuance of a substantial equivalence determination does not mean that FDA has made a determination that your device complies with other requirements of the Act or any Federal statutes and regulations administered by other Federal agencies. You must comply with all the Act's requirements, including, but not limited to: registration and listing (21 CFR Part 807); labeling (21 CFR Part 801); medical device reporting (reporting of medical device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (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.
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If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please contact the Division of Industry and Consumer Education at its toll-free number (800) 638 2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/Resourcesfor You/Industry/default.htm. Also, please note the regulation entitled, "Misbranding by reference to premarket notification" (21 CFR Part 807.97). For questions regarding the reporting of adverse events under the MDR regulation (21 CFR Part 803), please go to
http://www.fda.gov/MedicalDevices/Safety/ReportaProblem/default.htm for the CDRH's Office of Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Industry and Consumer Education at its toll-free number (800) 638-2041 or (301) 796-7100 or at its Internet address
http://www.fda.gov/MedicalDevices/ResourcesforYou/Industry/default.htm.
Sincerely yours.
Michael D'Hara
for
Janine M. Morris Director Division of Radiological Health Office of In Vitro Diagnostics and Radiological Health Center for Devices and Radiological Health
Enclosure
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#### DEPARTMENT OF HEALTH AND HUMAN SERVICES Food and Drug Administration
# Indications for Use
510(k) Number (if known)
k142755
Device Name Siemens 3.0T Blanket Array Coil
Indications for Use (Describe)
The coil is indicated for use by the order of a physician to be used as an accessory to a Siemens 3.07 magnetic resonance scanner for general human anatomy imaging as supported by the scanner. These images, when interpreted by a trained physician, may assist in medical diagnosis.
Type of Use (Select one or both, as applicable)
2 Prescription Use (Part 21 CFR 801 Subpart D)
_ Over-The-Counter Use (21 CFR 801 Subpart C)
EF
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| Section 8. | 510(k) Summary | |
|-------------------------------|----------------|----------------------------------------------------|
| Submitter's Name: | | Resonance Innovations LLC |
| Submitter's Address: | | 9840 South 140th St., Suite 8<br>Omaha, NE 68138 |
| Submitter's Telephone: | | 402-934-2650 |
| Submitter's Contact: | | Randall Jones, President |
| Date 510(k) Summary prepared: | | September 24, 2014 |
| Proprietary Name: | | Siemens 3.0T Blanket Array Coil Model<br>516SI3001 |
| Common or Usual Name: | | MRI coil(s) |
| Classification Name: | | Coil, Magnetic Resonance, Specialty |
| Classification Code: | | MOS |
| Predicate Device: | | 1.5T and 3.0T GE PROCURETM Array Coil<br>K140606 |
### Description of the Device
The Siemens 3.0T Blanket Array Coil embeds an MRI antenna set within a quilt-like enclosure providing high-quality images of general human anatomy. It is flexible enough to wrap snuggly around small bodies as well as large adult extremities so it can be used to image those challenging regions such as bilateral brachial plexus, bilateral lower extremities, and even heads. This lightweight SemiFlex™ design facilitates effortless and accurate positioning and ensures the multiple antenna elements as close as possible to the target anatomies regardless of patient size. The Blanket Array Coil is an MRI coil contained within a water-resistant case, featuring a soft and cleanable cover. What the patient feels is a lightweight, warm and soothing blanket. What the radiologist sees is a flawless image without compromising comfort. The underlying technology and materials used for manufacture are identical to standard MRI coil technology that has existed for several years. The coil uses similar blocking networks and impedance matching circuits, and it does not transmit energy into the patient, neither predicate nor current submission.
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| Device Model Number | Device Description |
|---------------------|---------------------------------|
| 516SI3001 | Siemens 3.0T Blanket Array Coil |
### Indications for Use
The coil is indicated for use by the order of a physician to be used as an accessory to a Siemens 3.0T magnetic resonance scanner for general human anatomy imaging as supported by the scanner. These images, when interpreted by a trained physician, may assist in medical diagnosis.
### Technological Characteristics
The comparison between the predicate and the current submission is described, below.
- 1. Design. This submission is for a dedicated coil that mav give diagnostic quality images of general human anatomy. It is a multi-channel coil with all channels designed to work at once, receive-only, in conjunction with the system body coil. The predicate multi-channel GE PROCURE™ Array Coil covers similar anatomy, also working as receive-only to the body coil. Both predicate and modified coils have resonant coil elements enclosed in semi-flexible assemblies. The modified device has been slightly modified to integrate with the Siemens MRI scanner. All design principles employed are mature and well-known throughout the industry.
- 2. Principles of operation: The scientific principles of operation (magnetic resonance) are identical between the predicate and modified devices. Theory of operation is very well understood throughout the industry.
- 3. Materials. The same materials are used in the construction of the predicate and modified device. All internal circuitry is encapsulated in flame retardant EVA foam, then completely covered with a nylon fabric or compressed EVA. This nylon fabric has been successfully used for over 10 years in the predicate device with no reported biocompatibility issues. Both modified and predicate devices have been tested for mechanical and electrical safety using IEC60601-1 3rd Edition, which for our application is identical to ES60601-1.
- 4. Chemical Composition. Both predicate and modified devices have a successful biocompatibility track record, as demonstrated by cytotoxicity testing and by their history of use in previously cleared devices.
- 5. Energy Source. This device is a receive-only coil that does not generate its own power, but rather is controlled by the MRI system as the energy source.
### Non-Clinical Tests
The predicate and current submission have been subject to similar risk management studies, as listed below, and determined to be substantially equivalent.
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- 1. Blocking network analysis
- 2. SNR and uniformity analysis
- 3. Risk management (including hazard analysis and FMEA)
- 4. Heat testing
- 5. Compliance testing to IEC60601-1 3rd Edition. IEC60601-1 was chosen for compliance in other world markets. A gap analysis of ES60601-1:2005/(R)2012 and C1:2009/(R)2012 and, a2:2010/(r)2012 with IEC60601-1 was performed and for our devices, the US deviations described by ES60601-1 do not modify the requirements of IEC60601-1. Consequently, we are compliant with ES60601-1.
# Clinical Tests
Analyses in all 3 planes (sagittal, coronal, and axial) were run on the Siemens 3.0T Blanket Array Coil to show that the anatomies of the submitted and predicate coils have substantial equivalence.
# Substantial Equivalence Decision
As described in this summary, the modified device is substantially equivalent to the predicate device based on the analysis herein. The modified device raises no new concerns of safety or efficacy.
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.