(20 days)
The 0.35T Signa® Ovation with Excite Magnetic Resonance System is an open, whole body scanner designed to support improved higher resolution imaging and shorter scan times. The Signa 0.35T Signa® Ovation with Excite Magnetic Resonance System is indicated for use as a diagnostic imaging device to produce transverse, sagittal, coronal and oblique images of the internal structures and organs of the entire body, including, but not limited to, the musculocskeletal, vascular, cardiac, and neuro systems. The images produced by the Signa 0.35T Signa® Ovation with Excite Magnetic Resonance System reflect the spatial distribution of protons (hydrogen nuclei) exhibiting magnetic resonance. The NMR properties that determine the image appearance are proton density, spin-lattice relaxation time (T1), spin-spin relaxation time (T2) and flow. When interpreted by a trained physician, these images provide information that can be useful in determining a diagnosis.
Due to the 'open' design of the Signa 0.35T Signa® Ovation with Excite may also be used for imaging during interventional procedures when performed with MR compatible devices such as, in-room display and MR safe biopsy needles
The 0.35T Signa ®Ovation with Excite Magnetic Resonance System is a modification to the 0.35T Signa® MFO/i Magnetic Resonance System (K002611) which utilizes a permanent magnet to acquire 2D single-slice and multi-slice, and 3D volume images. The 0.35T Signa ®Ovation with Excite Magnetic Resonance System features a permanent magnet operating at 0.35T. The system can image in the sagittal, coronal, axial, oblique and double oblique planes, using various pulse sequences. Images are acquired and reconstructed using 2D and 3D Fourier transformation techniques. The system is intended for high-resolution anatomical applications, short scan times, and multinuclear spectroscopy.
This document describes the 510(k) summary for the GE 0.35T Signa® Ovation with Excite Magnetic Resonance System. It does not contain information about acceptance criteria, device performance metrics, or a study design to meet specific acceptance criteria as would be typical for an AI/ML device submission. Instead, this is a traditional medical device submission for an MRI system, evaluating its substantial equivalence to a predicate device based on technical specifications and safety standards.
Therefore, most of the requested information regarding acceptance criteria and study design for an AI/ML device is not applicable to this document.
Here's an attempt to answer the questions based on the provided text, highlighting what is not applicable:
-
A table of acceptance criteria and the reported device performance
- Not Applicable: This document does not specify quantitative performance acceptance criteria in terms of clinical accuracy metrics (e.g., sensitivity, specificity) or report such performance for this MRI system. The evaluation focuses on meeting NEMA performance standards and IEC safety standards, and being "comparable" to a predicate device.
- The "performance" described relates to imaging capabilities like "improved higher resolution imaging and shorter scan times" and the technical differences from the predicate, such as "addition of four independent receive channels and an update to the performance of the gradient amplifiers." These are not numerical metrics with acceptance criteria provided in the text.
-
Sample size used for the test set and the data provenance (e.g. country of origin of the data, retrospective or prospective)
- Not Applicable: This document does not describe a test set or data provenance for evaluating an AI/ML algorithm. The evaluation methods mentioned are compliance with NEMA and IEC standards, and comparison to a predicate device's technical specifications.
-
Number of experts used to establish the ground truth for the test set and the qualifications of those experts (e.g. radiologist with 10 years of experience)
- Not Applicable: Ground truth for a test set is not discussed as this is not an AI/ML algorithm requiring such a validation. The interpretation of images is mentioned to be "by a trained physician," but this refers to the intended clinical use of the MRI system, not an evaluation method for the system itself as described in this submission.
-
Adjudication method (e.g. 2+1, 3+1, none) for the test set
- Not Applicable: There is no test set or adjudication method described for an AI/ML algorithm.
-
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
- Not Applicable: No MRMC study or AI assistance is mentioned in this document. This submission is for an MRI hardware system, not an AI/ML diagnostic aid.
-
If a standalone (i.e. algorithm only without human-in-the-loop performance) was done
- Not Applicable: This is an MRI system, not an algorithm, so standalone performance is not relevant in the AI/ML sense. The "standalone" performance would be its imaging capabilities, which are assessed against technical standards rather than clinical accuracy metrics.
-
The type of ground truth used (expert consensus, pathology, outcomes data, etc)
- Not Applicable: Ground truth, in the context of validating an AI/ML device, is not mentioned or required for this type of medical device submission.
-
The sample size for the training set
- Not Applicable: There is no AI/ML algorithm described in this document, and therefore no training set.
-
How the ground truth for the training set was established
- Not Applicable: There is no AI/ML algorithm described in this document, and therefore no ground truth for a training set.
Summary based on the provided text:
The GE 0.35T Signa® Ovation with Excite Magnetic Resonance System is a modification of an existing MRI system (Signa® MFO/i MR system K002611). The evaluation described in this 510(k) summary focuses on demonstrating substantial equivalence to the predicate device.
Key Evaluation Points mentioned:
- Compliance with Standards: The system was evaluated against "appropriate NEMA performance standards" and "IEC 601-1 International Medical Equipment Safety standard and IEC 601-2-33 Particular Requirements for Safety of Magnetic Resonance Equipment for Medical Diagnosis."
- Comparability: It is stated that the device "is comparable to the currently marketed Signa® 0.35T Ovation Magnetic Resonance System."
- Safety: The conclusion states, "Usage of the 0.35T Signa® Ovation with Excite Magnetic Resonance System does not result in any new potential hazards."
This submission is a regulatory filing for a hardware medical device, and the evaluation criteria and methods are typical for this type of device, focusing on safety, performance standards (like imaging parameters and resolution), and substantial equivalence to a previously cleared device, rather than diagnostic accuracy metrics or AI/ML algorithm performance.
§ 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.