MR 5300 and MR 7700 R11 MR Systems

The Philips MR 5300 and MR 7700 R11 MR Systems are advanced diagnostic imaging devices utilizing nuclear magnetic resonance to generate detailed anatomical and physiological images for clinical diagnosis and interventional guidance. This iteration incorporates new R11 software features including SmartSpeed AI and hardware upgrades like GPU-accelerated image reconstruction, aimed at enhancing image acquisition, quality, and operational workflow.

The Philips MR 5300 and MR 7700 R11 MR Systems are Magnetic Resonance Diagnostic Devices (MRDD) with 60 cm and 70 cm bores, operating at 1.5 Tesla and 3.0 Tesla, designed for diagnostic imaging and interventional guidance. These systems enable trained physicians to obtain various image types (cross-sectional, spectroscopic, spectra) of the head, body, or extremities by utilizing the principle of nuclear magnetic resonance, where atomic nuclei emit detectable signals when exposed to strong magnetic fields and radiofrequency pulses, which are then reconstructed into images. The systems can also be used to guide and evaluate interventional procedures, employing MR Conditional or MR Safe instrumentation. The R11 release introduces software enhancements such as SmartSpeed AI, SmartSpeed MotionFree, SmartSpeed 3D FreeBreathing, SmartSpeed Implant, and SmartSpeed DWI functionalities, alongside MR Workspace, ISP MR Packages, and MR Elastography (available for the MR 5300 model). Hardware modifications include the introduction of a graphical processing unit (GPU) in the host reconstruction computer for improved image reconstruction and an additional monitor for the operating console. The safety and effectiveness of these systems with their R11 modifications were established through non-clinical verification and validation testing, which confirmed they meet performance specifications and are adequate for their intended use, without requiring new clinical studies.

AI Regulatory Concerns

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• Q1. How does the 'SmartSpeed AI' algorithm specifically improve image acquisition speed or image quality compared to previous non-AI accelerated sequences in the MR 5300 and MR 7700 systems?; What are the quantitative benefits (e.g., percentage reduction in scan time, improvement in signal-to-noise ratio) observed with the new graphical processing unit for image reconstruction in these R11 systems?; Can 'SmartSpeed MotionFree' and 'SmartSpeed 3D FreeBreathing' be effectively combined, and what is their cumulative impact on image quality for patients unable to hold their breath?; What specific workflow efficiencies or diagnostic capabilities does the 'MR Workspace' enhancement provide to the clinical user of the MR 5300 and MR 7700 R11 systems?; For the MR Elastography feature on the MR 5300, what range of tissue stiffness values can be reliably measured, and how was its accuracy validated against phantoms or established methods?