(76 days)
The intended use of Paramed's MRJ product is for diagnostic MRI imaging of the hip, knee, ankle, foot, shoulder, elbow, wrist, hand, calf, thigh, arm, forearm, TMJ and cervical spine with limitation to joint pathologies -- no tumors, no angiography. The device produces transverse, sagittal, coronal and oblique cross-sectional images, displaying the internal structure of the limbs and joints being imaged. The images produced correspond to the spatial distribution of protons (hydrogen nuclei) that check the magnetic resonance properties and depend on the MR parameters (spin-lattice relaxation time -- T1, spin-spin relaxation time -- T2, nuclei density, flow velocity and chemical shift). If interpreted by a medical expert, these images can provide diagnostically useful information.
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I am sorry, but the provided text is a 510(k) clearance letter from the FDA for a medical device (MRJ) and does not contain the detailed information about acceptance criteria or specific study results as requested in your prompt. The document primarily focuses on regulatory approval and indications for use, without delving into the specifics of performance metrics, sample sizes, or ground truth establishment.
To answer your questions, I would need a different type of document, such as a clinical study report, a technical performance report, or the 510(k) submission summary that details the studies conducted.
§ 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.