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510(k) Data Aggregation

    K Number
    K040577
    Date Cleared
    2004-03-22

    (18 days)

    Product Code
    Regulation Number
    892.1750
    Reference & Predicate Devices
    Predicate For
    AI/MLSaMDIVD (In Vitro Diagnostic)TherapeuticDiagnosticis PCCP AuthorizedThirdpartyExpeditedreview
    Intended Use

    The Siemens SOMATOM P30L systems are intended to produce cross-sectional images of the body by computer reconstruction of x-ray transmission data from either the same axial plane taken at different angles or spiral planes* taken at different angles. (*spiral planes: the axial planes resulted from the continuous rotation of detectors and x-ray tube, and the simultaneous translation of the patient.)

    Device Description

    The Siemens SOMATOM P30L is a whole body X-ray computed tomography systems, which features a continuously rotating tube-detector system and functions according to the fan beam principle. The system software is a command-based program used for patient management, data management, X-ray scan control, image reconstruction, and image archive/evaluation.

    AI/ML Overview

    The provided text is a 510(k) summary for a Computed Tomography (CT) system (SOMATOM Project P30L) and does not contain detailed information about a study proving the device meets specific acceptance criteria in the way a clinical performance study for an AI/ML device would.

    The document focuses on demonstrating substantial equivalence to a predicate device (Siemens SOMATOM P30) for regulatory clearance, primarily based on the device's technical specifications and intended use. It describes the device's functionality and general safety measures taken during development.

    Therefore, many of the requested items (acceptance criteria table, sample sizes, expert ground truth, MRMC study, standalone performance, training set details) are not present in this 510(k) summary.

    Here's an analysis based on the available information:

    1. Table of Acceptance Criteria and Reported Device Performance:

    • Acceptance Criteria: Not explicitly stated as pass/fail metrics in the context of a performance study. The "acceptance criteria" here implicitly revolve around demonstrating that the new device (SOMATOM Project P30L) is as safe and effective as the predicate device (Siemens SOMATOM P30) in its intended use of producing cross-sectional images.
    • Reported Device Performance: The document does not report specific quantitative performance metrics like sensitivity, specificity, accuracy, or image quality scores that would usually be found in a performance study. Its "performance" is implicitly deemed equivalent to the predicate device.
    Acceptance Criteria (Inferred from 510(k) process)Reported Device Performance (from text)
    Device functions as intended (produces cross-sectional images via CT).The SOMATOM P30L is a whole body X-ray computed tomography system that "features a continuously rotating tube-detector system and functions according to the fan beam principle." It's "intended to produce cross-sectional images of the body by computer reconstruction of x-ray transmission data."
    Device is as safe and effective as the predicate device."Substantially equivalent to... Siemens SOMATOM P30... K013522." "Risk management is ensured via a hazard analysis... to identify potential hazards. These potential hazards are controlled via software development, verification and validation testing." Adherence to "recognized and established industry practice and standards" to minimize hazards.
    Compliance with relevant regulations and standards.Adheres to SMDA 1990 and 21 CFR §807.92. Assumed compliance with 21 CFR §892.1750 and general controls.

    2. Sample size used for the test set and the data provenance:

    • Not Applicable / Not Provided. This document is a 510(k) summary for a CT scanner hardware/software system, not an AI/ML device requiring a clinical performance study with a test set of patient data to evaluate algorithmic performance. The "test set" would refer to performance validation during engineering and manufacturing, not clinical data for diagnostic accuracy.

    3. Number of experts used to establish the ground truth for the test set and the qualifications of those experts:

    • Not Applicable/Not Provided. Ground truth establishment by experts is typically for clinical performance evaluation of diagnostic algorithms. This document doesn't detail such a study for the CT scanner itself.

    4. Adjudication method for the test set:

    • Not Applicable/Not Provided.

    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. This is not an AI-assisted diagnostic device. It's a CT scanner.

    6. If a standalone (i.e. algorithm only without human-in-the-loop performance) was done:

    • No. This question is largely irrelevant for a CT scanner, which is a foundational imaging device. Its "performance" is inherent in its image acquisition and reconstruction capabilities, not in an independent diagnostic algorithm.

    7. The type of ground truth used:

    • Not Applicable/Not Provided. For a CT scanner, the "ground truth" during its development and testing would likely relate to objective physical phantom measurements (e.g., spatial resolution, contrast resolution, noise), dose accuracy, and adherence to engineering specifications, rather than clinical diagnostic ground truth.

    8. The sample size for the training set:

    • Not Applicable/Not Provided. The software described is for "patient management, data management, X-ray scan control, image reconstruction, and image archive/evaluation." It's an operational software suite for a medical device, not an AI/ML algorithm that undergoes "training" on a dataset in the machine learning sense.

    9. How the ground truth for the training set was established:

    • Not Applicable/Not Provided.

    In summary: The provided 510(k) summary for the SOMATOM Project P30L is for a Computed Tomography X-ray system. The regulatory pathway chosen (510(k)) relies on demonstrating substantial equivalence to a legally marketed predicate device, rather than providing a detailed clinical performance study with defined acceptance criteria and ground truth in the way one would for a novel diagnostic AI/ML algorithm. Therefore, much of the requested information regarding study design and performance metrics is not present in this type of regulatory submission.

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