SIGNA Artist Evo

The SIGNATM Artist Evo is a whole-body magnetic resonance diagnostic device designed to produce high-resolution images with high signal-to-noise ratios and short scan times for comprehensive anatomical and functional assessment. It achieves this using a 1.5T superconducting magnet, a new IRMW gradient coil, and sophisticated data acquisition and image reconstruction techniques, leveraging established MR principles to provide detailed diagnostic information across various clinical applications.

The SIGNATM Artist Evo is a whole-body magnetic resonance (MR) scanner designed for diagnostic imaging, aiming to provide high-resolution images with a high signal-to-noise ratio and reduced scan times. Its methodology involves using a superconducting magnet, time-varying magnetic fields (gradients), and radiofrequency (RF) transmissions to elicit magnetic resonance signals from nuclei within the body. The system can acquire data through up to 128 independent receive channels and utilizes various pulse sequences and reconstruction algorithms to generate images in multiple planes, including axial, sagittal, coronal, oblique, and double oblique. It produces images reflecting the spatial distribution or molecular environment of these nuclei, which, when interpreted by a physician, can aid in diagnosis across a wide range of anatomical regions, including the head, neck, TMJ, spine, breast, heart, abdomen, pelvis, joints, prostate, blood vessels, and musculoskeletal system, with the option of using contrast agents. A key technological feature of the SIGNATM Artist Evo is the introduction of a new IRMW gradient coil, while it reuses existing GE Healthcare 1.5T LCC magnets. The RF transmit and receive subsystems, as well as core performance specifications like magnet stability, spatial homogeneity, and maximum gradient strength, remain largely unchanged from its predicate device. The system operates on the same software version as its predecessor, with minor modifications to accommodate the new hardware, but without alterations to pulse sequences, imaging protocols, or image processing techniques. Non-clinical performance testing, including compliance with various safety and performance standards, confirmed that the device performs as intended, with sample clinical images demonstrating acceptable diagnostic image quality equivalent to its predicate.

AI Regulatory Concerns

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Jev reads the full FDA letter and returns calibrated concern probabilities per regulatory category. These are AI estimates, not regulatory advice.

• Q1. How does the new IRMW gradient coil specifically contribute to improvements in image quality or scan time efficiency compared to previous gradient coil designs used with the 1.5T LCC magnets?; What are the quantitative differences in signal-to-noise ratio and spatial resolution achieved by the SIGNATM Artist Evo, particularly in challenging anatomical regions, when compared to its predicate device?; Are there specific pulse sequences or imaging protocols where the combination of the reused 1.5T LCC magnet and the new IRMW gradient coil offers a discernible advantage for diagnostic outcomes?; Given that the software has 'minor changes to accommodate the hardware differences,' what is the extent of these changes and do they introduce any new image reconstruction capabilities or workflow optimizations?; For which specific clinical applications or patient populations are the capabilities of the SIGNATM Artist Evo, such as its support for up to 128 receive channels, expected to provide the most significant clinical benefit?