(43 days)
The 1.5T GE and Siemens DuoFLEX® Coil Suites and the 3.0T GE and Siemens DuoFLEX® Coil Suites are indicated for use on the order of a physician in conjunction with a 1.5T GE Healthcare and Siemens Healthcare Magnetic Resonance Scanner system and a 3.0T GE Healthcare and Siemens Healthcare Magnetic Resonance Scanner system to produce 2D and 3D images that when interpreted by a trained physician vield information that may assist in diagnosis.
The MR Instruments FC 1520G-8R, FC 3000G-8R, FC 1500S-8R, and FC 3000S-8R Coil Suites are identical with the only exceptions:
FC 1520G-8R (GE MR Systems @ 63.86MHz with GE System Connector Plug)
FC 3000G-8R (GE MR Systems @ 127.73MHz with GE System Connector Plug)
FC 1500S-8R (Siemens MR Systems @ 63.6MHz with Siemens System Connector Plug)
FC 3000S-8R (Siemens MR Systems @ 123.23MHz with Siemens System Connector Plug)
The coil suites include two different sets of coil paddles and a single, shared preamplifier box (the "Connector Box") with a system connector. One set contains a pair of coil paddles containing four 24cm loops/channels per paddle for a total of eight channels for the two paddles. The second set contains a pair of coil paddles containing four 10cm loops/channels per paddle for a total of eight channels for the two paddles. These paddles connect to the same connector box containing eight preamplifiers; only one pair can be connected at a time. The coil design for all the paddles has the same, simple antennae design and the same system connectivity configuration. The coils can be used in the following configurations:
24cm by itself
24cm with 24cm
24cm with 10cm
10cm with 10cm
The aforementioned configurations provide 4 or 8 channels for imaging.
The provided document is a 510(k) premarket notification for the "DuoFLEX® Coil Suite," which is an MR diagnostic device (specialty magnetic resonance coil). This document does not describe an AI/ML-driven device or an acceptance study typical for such devices. Instead, it details the substantial equivalence of a new version of an MR coil to a previously cleared predicate device.
Therefore, many of the requested criteria related to AI/ML model acceptance studies (like sample size for training/test sets, expert adjudication, MRMC studies, ground truth establishment for training, etc.) are not applicable to this document. The "study" described is a set of non-clinical bench tests and performance testing with phantoms and volunteer scans to demonstrate substantial equivalence, not a clinical study to prove diagnostic performance improvement by an AI.
Here's an analysis of what is available in the document, mapped against the closest applicable aspects of your request, and explicitly stating what is not present:
Device: DuoFLEX® Coil Suite (Magnetic Resonance Imaging Coil)
Type of Study Conducted: Non-clinical bench testing, performance testing with phantoms, volunteer scans, and comparison to a predicate device to demonstrate substantial equivalence. This is not an AI/ML model performance study.
1. Table of Acceptance Criteria and Reported Device Performance:
The document describes the tests performed to demonstrate substantial equivalence rather than explicit acceptance criteria with numerical performance targets in a table format. The "acceptance" is based on the new device performing equivalently to the predicate and meeting safety standards.
| Acceptance Criteria (Implied from the "Non-Clinical Testing" section) | Reported Device Performance / Outcome |
|---|---|
| EMC and electrical safety testing | Tests conducted; presumed to have met standards for safety. |
| System safety testing | Tests conducted; presumed to have met standards for safety. |
| Performance testing with phantoms | Tests conducted; outcomes used to support substantial equivalence. |
| Predicate device comparison tests | Tests conducted; results support substantial equivalence. |
| Volunteer scans | Scans conducted; used to support substantial equivalence. |
| IEC 60601-1 Compliance (various tests) | Tests conducted; presumed to have met standards for medical electrical equipment safety. |
| Biocompatibility for patient contact materials | Tests conducted; presumed to have met standards. |
| NEMA MS-1 Signal to Noise Ratio (SNR) | Test conducted; used for performance evaluation against predicate. |
| Image Uniformity Comparison | Test conducted; used for performance evaluation against predicate. |
| Evaluation of Sample Clinical Images (Clinical Evaluation Testing) | Test conducted; used to support substantial equivalence. |
| Design Validation (in actual and simulated use settings) | Performed; results support substantial equivalence and safety. |
2. Sample size used for the test set and the data provenance:
- Test Set (for performance evaluation):
- Phantoms: Not specified, but phantom testing was performed.
- Volunteer Scans: "Volunteer scans" were conducted. The number of volunteers is not specified.
- Clinical Images: "Sample Clinical Images" were evaluated. The number of images/patients is not specified.
- Data Provenance: Not explicitly stated for volunteers or clinical images, but it's implied these were internal studies conducted by MR Instruments, Inc. No mention of country of origin or whether prospective/retrospective. Given it's a device clearance, the data would typically be gathered for the purpose of the submission.
3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts:
- Not applicable in the context of an AI/ML ground truth study. The evaluation involved "Evaluation of Sample Clinical Images (Clinical Evaluation Testing)" and comparison to the predicate. The document doesn't detail how "ground truth" (in the sense of a diagnostic label) was established, as the device is a coil for producing images, not interpreting them. The assessment would likely be on image quality, signal consistency, safety, etc., compared to the predicate, rather than diagnostic accuracy.
4. Adjudication method for the test set:
- Not applicable. No mention of expert adjudication as this is not a diagnostic AI performance study.
5. If a multi-reader multi-case (MRMC) comparative effectiveness study was done, if so, what was the effect size of how much human readers improve with AI vs without AI assistance:
- No MRMC study was done. This is not an AI-assisted diagnostic device. The study focused on demonstrating substantial equivalence of the new MR coil to an existing predicate coil. The document explicitly states: "This technology is not new; therefore, a clinical study was not considered necessary prior to release. Additionally, there was no clinical testing required to support the medical devices as the indications for use is equivalent to the predicate device. The substantial equivalence of the devices is supported by the non-clinical testing."
6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done:
- Partially applicable, but not for an AI algorithm. The "standalone" performance here refers to the performance of the MR coil itself (e.g., SNR, image uniformity, safety) as measured through bench tests, phantoms, and volunteer scans, independent of human interpretation for diagnostic purposes. These non-clinical tests demonstrate the coil's intrinsic characteristics.
7. The type of ground truth used:
- Not explicitly defined as "ground truth" in the diagnostic sense. For this device (an MR coil), "ground truth" implicitly relates to physical properties (e.g., magnetic field homogeneity, signal generation), safety parameters, and image quality characteristics (SNR, uniformity) as measured by calibrated equipment and compared against known standards or the predicate device's performance. The "volunteer scans" and "sample clinical images" would be assessed for image quality and usability for diagnostic purposes, not for confirming a specific diagnosis.
8. The sample size for the training set:
- Not applicable. This document describes an MR coil, not an AI/ML model that requires a training set.
9. How the ground truth for the training set was established:
- Not applicable. As above, this is not an AI/ML model.
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November 28, 2017
MR Instruments, Inc. % Mr. Mark Job Responsible Third Party Official Regulatory Technology Services, LLC 1394 25th Street. NW BUFFALO MN 55313
Re: K173290
Trade/Device Name: DuoFLEX® Coil Suite Regulation Number: 21 CFR 892.1000 Regulation Name: Magnetic resonance diagnostic device Regulatory Class: II Product Code: MOS Dated: November 13, 2017 Received: November 14, 2017
Dear Mr. Job:
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 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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(1-800-638-2041 or 301-796-7100).
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.
For comprehensive regulatory information about mediation-emitting products, including information about labeling regulations, please see Device Advice (https://www.fda.gov/MedicalDevices/DeviceRegulationandGuidance/) and CDRH Learn (http://www.fda.gov/Training/CDRHLearn). 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 (http://www.fda.gov/DICE) for more information or contact DICE by email (DICE@fda.hhs.gov) or phone
Sincerely,
Michael D. O'Hara for
Robert Ochs, Ph.D Director Division of Radiological Health Office of In Vitro Diagnostics and Radiological Health Center for Devices and Radiological Health
Enclosure
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Indications for Use
510(k) Number (if known) K173290
Device Name DuoFLEX® Coil Suite
Indications for Use (Describe)
The 1.5T GE and Siemens DuoFLEX® Coil Suites and the 3.0T GE and Siemens DuoFLEX® Coil Suites are indicated for use on the order of a physician in conjunction with a 1.5T GE Healthcare and Siemens Healthcare Magnetic Resonance Scanner system and a 3.0T GE Healthcare and Siemens Healthcare Magnetic Resonance Scanner system to produce 2D and 3D images that when interpreted by a trained physician vield information that may assist in diagnosis.
| Type of Use (Select one or both, as applicable) | |
|---|---|
| X Prescription Use (Part 21 CFR 801 Subpart D) | Over-The-Counter Use (21 CFR 801 Subpart C) |
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Image /page/3/Picture/1 description: The image shows the logo for MRI Instruments. The logo features the letters "MRI" in black, with the word "Instruments" in blue. There are blue swirls to the left of the letters "MRI".
| 510(k) Summary(As required by section 21 CFR 807.92(c)) | ||
|---|---|---|
| Submitter: | MR Instruments, Inc. | |
| 5610 Rowland Drive, Suite 145 | ||
| Minnetonka, MN 55343 | ||
| Contact Person: | Leon Ricord | |
| Director, Regulatory & QA | ||
| Telephone: 952-229-8812 | ||
| Email: Iricord@mrinstruments.com | ||
| MR Instruments, Inc. | ||
| 5610 Rowland Drive, Suite 145 | ||
| Minnetonka, MN 55343 | ||
| Date Prepared: | November 8th, 2017 | |
| Trade Name: | DuoFLEX® Coil Suite | |
| Common / Usual Name: | Specialty Magnetic Resonance Coil | |
| Classification: | 21 CFR 892.1000 | |
| Product Code: | MOS | |
| Manufacturer: | MR Instruments, Inc. | |
| 5610 Rowland Road, Suite 145 | ||
| Minnetonka, MN 55343 | ||
| Establishment Registration: | 3003852428 | |
| Predicate Device(s): | DuoFLEX Coil Suite (1.5T), K130706 | |
| Device Description: | The MR Instruments FC 1520G-8R, FC 3000G-8R, FC 1500S-8R, and FC | |
| 3000S-8R Coil Suites are identical with the only exceptions: | ||
| FC 1520G-8R (GE MR Systems @ 63.86MHz with GE System● | ||
| Connector Plug) | ||
| ●FC 3000G-8R (GE MR Systems @ 127.73MHz with GE SystemConnector Plug) | ||
| ●FC 1500S-8R (Siemens MR Systems @ 63.6MHz with Siemens | ||
| System Connector Plug) | ||
| FC 3000S-8R (Siemens MR Systems @ 123.23MHz with Siemens● | ||
| System Connector Plug) | ||
| The coil suites include two different sets of coil paddles and a single,shared preamplifier box (the "Connector Box") with a system | ||
| connector. One set contains a pair of coil paddles containing four 24cm | ||
| loops/channels per paddle for a total of eight channels for the two | ||
| paddles. The second set contains a pair of coil paddles containing four | ||
| 10cm loops/channels per paddle for a total of eight channels for the | ||
| two paddles. These paddles connect to the same connector box | ||
| containing eight preamplifiers; only one pair can be connected at a | ||
| time. The coil design for all the paddles has the same, simple antennae | ||
| design and the same system connectivity configuration. The coils can be | ||
| used in the following configurations: | ||
| 24cm by itself● | ||
| 24cm with 24cm 24cm with 10cm 10cm with 10cm The aforementioned configurations provide 4 or 8 channels for imaging. | ||
| Intended Use: | The 1.5T GE and Siemens DuoFLEX® Coil Suites and the 3.0T GE andSiemens DuoFLEX® Coil Suites are indicated for use on the order of aphysician in conjunction with a 1.5T GE Healthcare and SiemensHealthcare Magnetic Resonance Scanner system and a 3.0T GEHealthcare and Siemens Healthcare Magnetic Resonance Scannersystem to produce 2D and 3D images that when interpreted by atrained physician yield information that may assist in diagnosis. | |
| Comparison of TechnologicalCharacteristics: | The subject devices and the predicate device are identical except forthe following differences: Increased coil cable length by 12" Replaced system cable with foam segments Decreased system cable length by 6" Added cylindrical balun to the system cable Added an additional cylindrical balun to the coil cable Improved & updated internal electronics Three (3) of the Coil Suites' field strength and frequency: Predicate Device = 1.5T @ 63.86MHz Subject Devices That Differ: 1.5T @ 63.6MHz 3.0T @ 127.73MHz 3.0T @ 123.23MHz Two (2) of the Coil Suites' System Connector Plugs: Predicate Device = GE System Connector Plug Subject Devices = Siemens System Connector Plug | |
| The subject devices and the predicate device use the same technologyto perform the same function which is the use of Magnetic ResonanceImaging systems to provide images of various body parts. The MRInstruments' 1.5T DuoFLEX® Coil Suite (K130706) is designed to be usedeither as a pair of coils or as a single coil, and is designed to be flexibleenough to accommodate itself to various anatomical positions. Thesesame statements can be made for the new variations of the DuoFLEX®Coil Suites. | ||
| Summary of TechnicalComparisons: | The comparison of the DuoFLEX® Coil Suites to the predicate devicewith respect to intended use, target population, technologicalcharacteristics, and principles of operation confirms substantialequivalence. The fundamental performance and functionalcharacteristics of the DuoFLEX® Coil Suites are identical to the predicate1.5T DuoFLEX® Coil Suite (K130706). | |
| Non-Clinical Testing: | The following bench testing was conducted on the DuoFLEX® CoilSuites: EMC and electrical safety testing | |
| • | System safety testing | |
| • | Performance testing with phantoms | |
| • | Predicate device comparison tests | |
| • | Volunteer scans | |
| • | Per IEC 60601-1: | |
| ○ Humidity Preconditioning for Dielectric Test | ||
| ○ Determination of Accessible Parts | ||
| ○ Legibility of Markings | ||
| ○ Durability of Markings | ||
| ○ Dielectric Strength | ||
| ○ Ball Pressure | ||
| ○ Creepage Distances and Air Clearance | ||
| ○ Surfaces, Corners and Edges | ||
| ○ Instability in Transport Position | ||
| ○ Cleaning, disinfection of ME equipment | ||
| ○ Mold Stress Relief | ||
| ○ Impact Test | ||
| ○ Push Test | ||
| ○ Drop test portable ME equipment | ||
| The following testing has been performed to support substantial equivalence: | ||
| • | Biocompatibility for patient contact materials | |
| • | NEMA MS-1 Signal to Nosie Ratio | |
| • | Image Uniformity Comparison | |
| • | Evaluation of Sample Clinical Images (Clinical Evaluation Testing) | |
| The following quality assurance measures were applied during development of this devices (appendices D, F, G): | ||
| • | Failure Mode Effects Analysis / Hazard Analysis (FMEA) | |
| • | Design FMEAs for mechanical and RF designs | |
| • | Performance Requirements Testing including Final Bench Testing, ISO 60601 Testing, Surface Temperature Testing, SNR per NEMA MS-1 and MS-6, and Image Uniformity | |
| Design Validation: | Design validation was performed using the DuoFLEX® Coil Suites in actual and simulated use settings. The results support substantial equivalence to the predicate device and demonstrate that the DuoFLEX® Coil Suites are safe for its intended use. | |
| Clinical Testing: | This technology is not new; therefore, a clinical study was not considered necessary prior to release. Additionally, there was no clinical testing required to support the medical devices as the indications for use is equivalent to the predicate device. The substantial equivalence of the devices is supported by the non-clinical testing. |
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Image /page/4/Picture/1 description: The image shows the logo for MR Instruments. The logo features the letters "MR" in black, with the word "INSTRUMENTS" in blue. There is a blue swirl design to the left of the letters.
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Image /page/6/Picture/1 description: The image shows the logo for MRI Instruments. The logo features a stylized blue swirl design on the left, followed by the text "MRI" in black, and "INSTRUMENTS" in blue. The text is in a sans-serif font and is horizontally aligned.
Conclusion: We conclude that the results of testing show the DuoFLEX® Coil Suites to be substantially equivalent to the predicate device. The DuoFLEX® Coil Suites have the same technological and functional characteristics as the predicate device in that all devices are receiveonly RF coils intended for use with MRI equipment. The DuoFLEX® Coil Suites have the same intended use as the predicate device in that all devices are intended for diagnostic imaging. lt has been shown in this 510(k) submission that the difference between the DuoFLEX® Coil Suites and the 1.5T DuoFLEX® Coil Suite (K130706) do not raise any questions regarding safety and effectiveness. The DuoFLEX® Coil Suites, as designed and manufactured, are substantially equivalent to, and as safe and effective as, the referenced predicate device.
§ 892.1000 Magnetic resonance diagnostic device.
(a)
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).(b)
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.