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    Core Laboratory

    An independent, centralized laboratory that performs standardized, blinded analysis of imaging or physiologic data from multiple trial sites to produce consistent endpoint adjudication.

    Reviewed by Christian Espinosa, Founder, Blue Goat CyberLast reviewed September 19, 2026

    Definition

    A core laboratory (core lab) is an independent facility contracted in a clinical trial to perform centralized, standardized acquisition, processing, and interpretation of study data, most commonly imaging such as angiography, echocardiography, or CT/MRI, but also ECG, pulmonary function, or other physiologic measurements. By analyzing all subjects' data using a single set of trained readers and a common protocol, a core lab reduces the inter-site and inter-reader variability that would occur if each investigational site's local personnel interpreted their own images, and it allows readers to remain blinded to treatment assignment and clinical outcome, which protects against assessment bias in device trials where blinding of the intervention itself may not be feasible.

    What this means in practice

    Core labs are particularly important for medical device pivotal trials submitted to FDA under a PMA or de novo pathway, where the primary effectiveness endpoint is often an imaging-based or physiologic measurement, such as minimal lumen diameter in a coronary stent trial or ejection fraction in a structural heart trial. FDA's investigational device exemption and PMA review teams frequently expect core lab charters that pre-specify reader qualifications, adjudication procedures for reader disagreement, and independence from the sponsor to be documented in the study protocol and included in the submission.
    Common pitfalls
    • •Allowing site-level image interpretation to substitute for core lab adjudication of a primary endpoint, which introduces variability that reviewers may flag as a study limitation.
    • •Failing to pre-specify the adjudication process for discordant reads between two core lab readers, leading to post hoc, and therefore less credible, tie-breaking decisions.
    • •Underestimating the image and data transfer logistics, including de-identification and file format standardization, needed to keep a core lab blinded and operationally efficient across many sites.

    Frequently asked questions

    A core lab standardizes measurement technique and keeps readers blinded to treatment and outcome, reducing variability and bias that would otherwise weaken confidence in an imaging-based or physiologic primary endpoint.

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    3 sources

    Every citation below opens the original document. Each is graded against our source-tier hierarchy so you can see what rests on binding law versus commentary.

    Tier 2Regulator guidance and consensus· 3
    Link health: 2 verified 1 unchecked· last checked 2026-06-20
    1. 1
      FDA Guidance, Clinical Investigator Responsibilities
      Tier 2 Verified
      FDAfda.gov
    2. 2
      FDA Guidance, Design Considerations for Pivotal Clinical Investigations for Medical Devices
      Tier 2 Unchecked
      FDAfda.gov
    3. 3
      FDA - Clinical Trials and Human Subject Protection
      Tier 2 Verified
      FDAfda.gov

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