iMRX is an integrated imaging system combining X-ray Angiography and Magnetic Resonance for interventional, diagnostic, and intra-operative imaging. The iMRX system uses the Artis zee family of dedicated angiography systems for single and biplane diagnostic imaging and interventional procedures including, but not limited to, pediatric and obese patients. Procedures that can be performed with the iMRX system include cardiac angiography, neuro-angiography, general angiography, rotational angiography, operating room angiography and whole body radiographic/fluoroscopic procedures. The iMRX system can also support the acquisition of position triggered imaging for spatial data synthesis. The iMRX system uses the IMRIS family of Intra-operative MRI systems indicated for use as a magnetic resonance diagnostic device (MRDD) that produce transverse, sagittal, coronal and oblique cross sectional images, spectroscopic images and / or spectra, and that display the internal structure and / or function of the head and whole body. Depending on the region of interest, contrast agents may be used. These images and i or spectra when interpreted by a trained physician yield information that may assist in diagnosis. The iMRX system may also be used for imaging during intra-operative and interventional procedures when performed with MR safe devices or MR conditional devices approved for use with the MR scanner. The iMRX system may also be used for imaging in a multi-room suite.
Device Story
iMRX integrates Siemens Artis zee X-ray angiography system with IMRIS intra-operative MRI system; enables combined imaging in OR or angio suite. MRI unit suspended on overhead rail system for multi-room mobility; operates in RF-shielded environment. Inputs: X-ray signals and MR signals. Outputs: cross-sectional images (transverse, sagittal, coronal, oblique), spectroscopic images/spectra. Used by physicians for intra-operative/interventional guidance; supports spatial data synthesis via position-triggered imaging. Benefits: allows real-time diagnostic imaging during surgery/intervention without patient transport. System retains full diagnostic functionality of standard MRI and angiography systems.
Clinical Evidence
No clinical data. Bench testing only to verify equivalence to Siemens Artis zee and IMRIS Neuro systems regarding safety, imaging performance (signal-to-noise, uniformity, geometric distortion, spatial resolution), and mechanical/electrical hazards.
Technological Characteristics
Integrated system: Siemens Artis zee (X-ray) and IMRIS Neuro (MRI). Overhead rail-mounted MRI system for multi-room use. Includes Magnet Mover Assembly, OR patient table, intra-operative coils, head fixation device. RF-shielded room required. Connectivity: standard diagnostic imaging interfaces. Sterilization: N/A (device is imaging equipment).
Indications for Use
Indicated for head and whole body imaging in pediatric and adult patients, including obese patients. Used for interventional, diagnostic, and intra-operative procedures, including cardiac, neuro, and general angiography, and radiographic/fluoroscopic procedures. Contraindicated for use with non-MR safe or non-MR conditional devices during MRI operation.
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.
IMRIS Neuro III-SV Intra-operative MRI System (K083137)
IMRIS Neuro II-SE Intra-operative MRI System (K061916, K071099)
Submission Summary (Full Text)
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510(k) Summary for iMRX system
## 510(k) SUMMARY FOR iMRX SYSTEM
#### 1. GENERAL INFORMATION
IMRIS
| Establishment: | IMRIS Inc. | |
|-------------------------------|---------------------------------------------------------------------------------------------------------------------------------------|--------------|
| Address: | 100-1370 Sony Place<br>Winnipeg, Manitoba<br>Canada, R3T 1N5 | SEP - 2 2009 |
| Registration Number: | 3003807210 | |
| Contact Person: | Mrs. B. Newis<br>Quality Assurance Representative<br>email: bnewis@imris.com<br>Phone: 1-204-480-7070 ext.7043<br>Fax: 1-204-480-7071 | |
| Date of Summary Preparation: | April 15, 2009 | |
| Device Name: | iMRX | |
| Trade Name: | IMRISnv / IMRIScardio | |
| Classification Name: | Angiography X-ray system, Magnetic Resonance<br>Diagnostic Device (MRDD) | |
| Classification Panel: | Radiology | |
| Classification (CFR section): | 21 CFR 892.1600, 21 CFR 892.1000 | |
| Class: | Class II | |
| Product Code: | IZI (Angiography x-ray system), LNH (Magnetic Resonance<br>Imaging System) | |
#### 2. INTENDED USE OF THE DEVICE
iMRX is an integrated imaging system combining X-ray Angiography and Magnetic Resonance for interventional, diagnostic, and intra-operative imaging.
The iMRX system uses the Artis zee family of dedicated angiography systems for single and biplane diagnostic imaging and interventional procedures including, but not limited to, pediatric and obese patients. Procedures that can be performed with the iMRX system include cardiac angiography, neuro-angiography, general angiography, rotational angiography, operating room angiography and whole body radiographic/fluoroscopic procedures. The iMRX system can also support the acquisition of position triggered imaging for spatial data synthesis.
The iMRX system uses the IMRIS family of Intra-operative MRI systems indicated for use as a magnetic resonance diagnostic device (MRDD) that produce transverse, sagittal, coronal and oblique cross sectional images, spectroscopic images and / or spectra, and that display the internal structure and / or function of the head and whole body. Depending on the region of interest, contrast agents may be used. These images and i or spectra when interpreted by a trained physician yield information that may assist in diagnosis.
The iMRX system may also be used for imaging during intra-operative and interventional procedures when performed with MR safe devices or MR conditional devices approved for use with the MR scanner.
The iMRX system may also be used for imaging in a multi-room suite.
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#### 3. INDICATIONS FOR USE
The iMRX system is indicated for use for the head and whole body.
#### 4. DEVICE DESCRIPTION
The iMRX system is an integrated configuration combining X-ray Angiography and Magnetic Resonance for interventional, diagnostic, and intra-operative imaging. The iMRX system is the integration of a Siemens Artis zee family (biplane or floor mounted single plane) and the IMRISheuro System (Neuro III-SV or Neuro II-SE system). The iMRX system is a solution providing MRI scanning capabilities in the Angiography room while retaining all the functionality of Siemens Artis zee system. The iMRX system includes a traditional MRI unit that has been suspended on an overhead rail system, and is designed to operate inside an RF shielded room to facilitate imaging in multiple rooms. It provides imaging to support intra-operative and interventional capability in the operating room and angio room, while retaining all diagnostic functionality of a standard MRI system in the diagnostic room.
#### 5. SUBSTANTIALLY EQUIVALENT
The iMRX system is substantially equivalent to the following cleared medical devices.
| Predicate Device name | 510(k) Number | FDA Clearance date |
|-----------------------------------------------|--------------------|------------------------------|
| Siemens Artis zee / zeego | K073290 | Feb 11, 2008 |
| IMRIS Neuro III-SV Intra-operative MRI System | K083137 | Dec 16, 2008 |
| IMRIS Neuro II-SE Intra-operative MRI System | K061916<br>K071099 | Aug 11, 2006<br>May 22, 2007 |
### 6. SAFETY & EFFECTIVENESS
The iMRX has been designed to provide MRI imaging in an intra-operative setting in the same manner as the predicate IMRISneuro (Neuro II-SE) Systems and to provide a complete range of angiography applications in the same manner as the predicate Siemens Arts zee system.
The iMRX system retains all Siemens Artis zee system safety features including visual and audible warnings. To minimize electrical, mechanical and radiation hazards, IMRIS adheres to recognized and established industry practice, and all equipment complies with standard performance testing. Testing has been combleted to verify the equivalence of iMRX to the Siemens Artis zee system. This assures that the performance of this device can be considered safe and effective with respect to the currently available Siemens Artis zee system.
The iMRX intra-operative features, including Siemens MRI system, Magnet Mover Assembly, OR Patient Table, Intra-operative Coils and Head Fixation Device are substantially equivalent to the same intra-operative features of the predicate Neuro III-SV and predicate Neuro II-SE. The iMRX does not raise any new safety or effectiveness issues related to the use of a moving MRI system in an intra-operative setting.
The iMRX MRI imaging system's software and hardware are substantially equivalent to the Neuro III-SV (based on the Siemens MAGNETOM Verio 3T MRI) System and the Neuro II-SE (based on the Siemens MAGNETOM Espree MRI) system. The iMRX does not raise any new safety issues related to static magnetic field effects, changing magnetic field effects, RF heating or acoustic noise or effectiveness issues related to specification volume, signal to noise, image uniformity, and geometric distortion, slice profile, thickness and gap, or high contrast spatial resolution. Testing has been completed to verify the equivalence of iMRX to the IMRISneuro (Neuro III-SV/Neuro II-SE) system. This assures that the performance of this device can be considered safe and effective with respect to the currently available IMRISneuro system.
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Image /page/2/Picture/1 description: The image shows the logo for the U.S. Department of Health & Human Services. The logo features a stylized eagle in flight, rendered in blue. The words "DEPARTMENT OF HEALTH & HUMAN SERVICES USA" are arranged in a circular pattern around the eagle.
NOV 22 2009
Food and Drug Administration 10903 New Hampshire Avenue Document Mail Center - WO66-G609 Silver Spring, MD 20993-0002
IMRIS, Inc. % Mr. Thomas M. Tsakeris President Devices & Diagnostic Consulting Group, Inc. 16809 Briardale Road ROCKVILLE MD 20855
Re: K091166
Trade/Device Name: iMRX Regulation Number: 21 CFR 892.1000 Regulation Name: Magnetic resonance diagnostic device Regulatory Class: II Product Code: LNH and IZI Dated: August 6, 2009 Received: August 10, 2009
Dear Mr. Tsakeris:
This letter corrects our substantially equivalent letter of September 2, 2009.
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 (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 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
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device-related adverse events) (21 CFR 803); good manufacturing practice requirements as set forth in the quality systems (QS) regulation (2) CFR Part 820); and if applicable, the electronic product radiation control provisions (Sections 531-542 of the Act); 21 CFR 100-1050.
If you desire specific advice for your device on our labeling regulation (21 CFR Part 801), please go to http://www.fda.gov/AboutFDA/CentersOffices/CDRH/CDRH0ff CF CFR Part 801), please
the Center for Devices and Podic locked on infrices/CDRH/CDRHOffices/ucm11 15809.htm fo the Center for Devices and Radiological Health 's (CDRH) incessurem i 13809.htm for the note the regulation entitled, "Misbranding by reference to premarket notification" (21CFR Pat 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/cdrisms.net/member for the MDR regil Surveillance and Biometrics/Division of Postmarket Surveillance.
You may obtain other general information on your responsibilities under the Act from the Division of Small Manufacturers, International and Consumer Assistance at its toll the (800) 638-2041 or (240) 276-3150 or at its Internet address http://www.fda.gov/cdrh/industry/support/index.html.
Sincerely yours,
Lamme M. Morsul
Janine M. Morsul
Janine M. Morris Acting Director, Division of Reproductive, Abdominal, and Radiological Devices Office of Device Evaluation Center for Devices and Radiological Health
Enclosure
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# Indications for Use Statement
510(k) Number (if known):
Device Name:
K091166
iMRX
#### Indications For Use:
iMRX is an integrated imaging system combining X-ray Angiography and Magnetic Resonance for interventional, diagnostic, and intra-operative imaging.
The iMRX system uses the Artis zee family of dedicated angiography systems for single and biplane diagnostic imaging that were were including, but not limited to, pediatric and obese patients. Procedures that can be performed with the MRX system include cardiac angiography, newnangiography, general angiography, rotational angiography, operating room angiography, neuro, body radiographic fluoroscopic procedures. The iMRX system can also support the acquisition of position triggered imaging for spatial data synthesis.
The iMRX system uses the IMRIS family of Intra-operative MRI systems indicated for use as a magnetic resonance diagnostic device (MRDD) that produce transverse, sagittal, coronal and oblique cross sectional images, spectroscopic images and for spectra, and that display the internal structure and / or function of the head and whole body. Depending on the region of interest, contrast agents may be used. These images and / or spectra when interpreted by a trained physician yield information that may assist in diagnosis.
The iMRX system may also be used for imaging during intra-operative and interventional procedures when performed with MR safe devices or MR conditional devices approved for use with the MR scanner.
The iMRX system may also be used for imaging in a multi-room suite.
Prescription Use (Part 21 CFR 801 Subpart D)
Over-The-Counter Use (Part 21 CFR 807 Subpart C)
(PLEASE DO NOT WRITE BELOW THIS LINE - CONTINUE ON ANOTHER PAGE IF NEEDED)
Concurrence of CDRH, Office of Device Evaluation (ODE)
---
(Division Sign-Off) Division of Reproductive, Abdominal and Radiological Devic
510(k) Number K091166
AND/OR
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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
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.