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Kosmos Guidance Performance Evaluation Data Annotation

13. August 2026 aktualisiert von: EchoNous Inc.
The purpose of this study is to supplement prior Kosmos Trio Guidance performance testing conducted under ECHO-020 Kosmos Guidance, Grading, and Capture Performance Evaluation Protocol. The Kosmos Trio Guidance algorithm is designed to provide guidance to help novice scanners acquire images and videos during ultrasound scanning of three cardiac views (Parastenal Long Axis, Apical 4 Chamber, and Apical 2 Chamber) with Kosmos Trio. The study will divide the guidance cues not evaluated sufficiently in the ECHO-020 study into four categories: 1) corrective guidance, 2) incorrect scanning window, 3) incorrect probe orientation, and 4) low confidence prediction. For each guidance cue evaluated in this study, expert annotators will review two clips: one suboptimal view, collected when the probe is positioned at an incorrect location; and one guided view, captured after the sonographer followed the probe motion cue displayed by the system. Annotators will review each pair of clips and respond indicating either i) Yes, the guided clip demonstrates the appropriate correction from the suboptimal view; ii) No, the guided clip does not demonstrate the appropriate correction from the suboptimal view; or iii) Unevaluable, the guided clip is technically inadequate for assessment. For each category of guidance cues, the outcome measure will be the rate at which annotators respond "Yes." Finally, this study will also evaluate the Kosmos Trio Auto-Capture algorithm's ability to detect and capture a diagnostic-quality image. Annotators will rate clips captured by Kosmos Trio Auto-Capture on an ACEP-based image quality scale. The outcome measure will be the image quality score. The study design involves the compilation of de-identified retrospective cardiac clips acquired using the Kosmos diagnostic ultrasound system. This data was collected for two previous studies; no additional data will be collected from previous study participants for the purposes of this study.

Studienübersicht

Status

Aktiv, nicht rekrutierend

Bedingungen

Intervention / Behandlung

Studientyp

Beobachtungs

Einschreibung (Geschätzt)

81

Kontakte und Standorte

Dieser Abschnitt enthält die Kontaktdaten derjenigen, die die Studie durchführen, und Informationen darüber, wo diese Studie durchgeführt wird.

Studienorte

    • Washington
      • Redmond, Washington, Vereinigte Staaten, 98052
        • EchoNous, Inc.

Teilnahmekriterien

Forscher suchen nach Personen, die einer bestimmten Beschreibung entsprechen, die als Auswahlkriterien bezeichnet werden. Einige Beispiele für diese Kriterien sind der allgemeine Gesundheitszustand einer Person oder frühere Behandlungen.

Zulassungskriterien

Studienberechtigtes Alter

  • Erwachsene
  • Älterer Erwachsener

Akzeptiert gesunde Freiwillige

Ja

Probenahmeverfahren

Nicht-Wahrscheinlichkeitsprobe

Studienpopulation

The study used retrospective datasets from 2 sources: ECHO-020 Kosmos Guidance, Grading, and Capture Performance Evaluation study, and ECHO-025 Kosmos Guidance Performance Evaluation study. Both datasets comprise fully de-identified, retrospective, echocardiographic clips acquired using the Kosmos diagnostic ultrasound system.

Data collection for both studies was performed at EchoNous headquarters in Redmond, Washington. Source data was collected targeting a balanced representation of demographics and clinical characteristics (including gender and BMI) to ensure the generalizability of study findings.

Beschreibung

Inclusion Criteria:

  • All data used in this study must have been collected per 45 CFR § 26,
  • Data must have been collected per source protocol requirements with no deviation for that data set,
  • Adequate demographic information available from original study participation (sex, BMI, ethnicity, and race)
  • Exam acquisition performed by a qualified echocardiographer using the Kosmos system

Exclusion Criteria:

  • Inadequate demographic information corresponding to the available data, and
  • Non-echocardiographer acquired images.

Studienplan

Dieser Abschnitt enthält Einzelheiten zum Studienplan, einschließlich des Studiendesigns und der Messung der Studieninhalte.

Wie ist die Studie aufgebaut?

Designdetails

Kohorten und Interventionen

Gruppe / Kohorte
Intervention / Behandlung
Project 1
Participants included in Project 1, Category 1: Corrective Guidance
When the system detects that the probe is near the correct cardiac window but requires a specific directional adjustment, it displays a Category 1 - Corrective Guidance message. Each case in this project consists of two clips: Clip A - Suboptimal View: captured after the sonographer has intentionally moved the probe to a prescribed off-target position; and Clip B - Guided View: captured after the sonographer followed the Category 1 probe motion cue displayed by the system. For each pair of clips, annotators will be asked when Comparing Clip A and Clip B whether following the Category 1 corrective guidance instruction produces a discernible improvement in overall image quality. They will provide an answer of Yes, No, or Unevaluable.
Project 2
Participants included in Project 2, Category 2: Incorrect Scanning Window
When the system detects that the probe is positioned at a fundamentally incorrect anatomical location relative to the target cardiac view, it displays a Category 2 - Incorrect Scanning Window message. Each case in this project consists of two clips: Clip A - Suboptimal View: captured after the sonographer has intentionally a clearly incorrect anatomical location; and Clip B - Guided View: captured after the sonographer followed the Category 2 window-navigation cue and moved to the correct scanning window displayed by the system. For each pair of clips, annotators will be asked when Comparing Clip A and Clip B whether following the Category 2 guidance instruction produces a clip in the correct scanning window. They will provide an answer of Yes, No, or Unevaluable.
Project 3
Participants included in Project 3, Category 3: Incorrect Probe Orientation
When the system detects that the probe has been rotated 180° around its longitudinal axis, producing a laterally mirrored image, it displays a Category 3 - Incorrect Probe Orientation message. Each case in this project consists of two clips: Clip A - Suboptimal View: with the probe rotated 180° at the correct cardiac window, producing a mirrored image; and Clip B - Guided View: sonographer corrected the probe orientation in response to the Category 3 message displayed by the system. For each pair of clips, annotators will be asked when Comparing Clip A and Clip B whether following the Category 3 guidance instruction produced a clip that is oriented correctly. They will provide an answer of Yes, No, or Unevaluable.
Project 4
Participants included in Project 4, Category 4: Low Confidence Prediction
When the system's confidence in the current image is insufficient to issue a specific directional correction, it displays a Category 4 - Low Confidence Prediction message. Each case in this project consists of two clips: Clip A - Suboptimal View: with the probe rotated 180° at the correct cardiac window, producing a mirrored image; and Clip B - Guided View: sonographer corrected the probe orientation in response to the Category 3 message displayed by the system. For each pair of clips, annotators will be asked when Comparing Clip A and Clip B whether following the Category 3 guidance instruction produced a clip that is oriented correctly. They will provide an answer of Yes, No, or Unevaluable.
Project 5
Participants included in Project 5, Auto-Capture Frame-Level Re-annotation
The Kosmos Trio Auto-Capture feature automatically triggers clip recording when it detects that a diagnostic quality image has been achieved. Each case in this project is a single captured clip. No comparison clip is provided. The view (PLAX, A4C, or A2C) is indicated for each case. For each frame in this clip, annotators will be asked to assign a quality grade using the ACEP 1-5 image quality scale (where 1 represents a frame in which the relevant anatomy is not visualized or identifiable, and 5 represents a frame in which the image is sharp and the relevant anatomy is well visualized and present in the frame) to each frame.

Was misst die Studie?

Primäre Ergebnismessungen

Ergebnis Maßnahme
Maßnahmenbeschreibung
Zeitfenster
Guidance Algorithm Accuracy
Zeitfenster: Post data acquisition (2 months)
Guidance algorithm accuracy will be evaluated using Positive Predictive Value (PPV), a calculation that compares the diagnostic quality between the suboptimal view following an indicated probe movement and the guided view following the Guidance correction of the probe location. PPV will be calculated for each cardiac view included in this study (PLAX, A4C, and A2C), across all four Guidance categories. PPV is calculated by dividing the number of True Positives (the number of trial pairs in which the post-action clip demonstrates that following the guidance instruction produced the intended improvement for the applicable guidance category) by the number of True Positives plus the number of False Positives (the number of trial pairs in which the post-action clip does not demonstrate the expected improvement for the applicable category). Success is defined as a PPV > 0.80 and 95% CI lower bound > 0.80 for each view. All three views must independently satisfy this criteria.
Post data acquisition (2 months)
Performance of Auto-Capture
Zeitfenster: Post data acquisition (2 months)
The accuracy of Auto-Capture will be evaluated using Positive Predictive Value (PPV), a calculation that provides the proportion of clips captured using Auto-Capture that contain a sufficient proportion of diagnostic-quality frames to be considered clinically acceptable. PPV is calculated by dividing the number of True Positives (the number of clips with at least one full cardiac cycle of frames is determined to be diagnostic by expert reviewers, in accordance with the ACEP-based grading scale) by the number of True Positives plus the number of False Positives (the number of clips that do not have at least one full cardiac cycle of frames is determined to be diagnostic by expert reviewers, in accordance with the ACEP-based grading scale). Success is defined as a PPV > 0.80 and 95% CI lower bound > 0.80.
Post data acquisition (2 months)

Mitarbeiter und Ermittler

Hier finden Sie Personen und Organisationen, die an dieser Studie beteiligt sind.

Sponsor

Studienaufzeichnungsdaten

Diese Daten verfolgen den Fortschritt der Übermittlung von Studienaufzeichnungen und zusammenfassenden Ergebnissen an ClinicalTrials.gov. Studienaufzeichnungen und gemeldete Ergebnisse werden von der National Library of Medicine (NLM) überprüft, um sicherzustellen, dass sie bestimmten Qualitätskontrollstandards entsprechen, bevor sie auf der öffentlichen Website veröffentlicht werden.

Haupttermine studieren

Studienbeginn (Tatsächlich)

5. Juni 2026

Primärer Abschluss (Geschätzt)

30. August 2026

Studienabschluss (Geschätzt)

30. September 2026

Studienanmeldedaten

Zuerst eingereicht

13. August 2026

Zuerst eingereicht, das die QC-Kriterien erfüllt hat

13. August 2026

Zuerst gepostet (Tatsächlich)

18. August 2026

Studienaufzeichnungsaktualisierungen

Letztes Update gepostet (Tatsächlich)

18. August 2026

Letztes eingereichtes Update, das die QC-Kriterien erfüllt

13. August 2026

Zuletzt verifiziert

1. August 2026

Mehr Informationen

Begriffe im Zusammenhang mit dieser Studie

Zusätzliche relevante MeSH-Bedingungen

Andere Studien-ID-Nummern

  • ECHO-302

Plan für individuelle Teilnehmerdaten (IPD)

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UNENTSCHIEDEN

Beschreibung des IPD-Plans

Publication decisions will be made at a later date.

Arzneimittel- und Geräteinformationen, Studienunterlagen

Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt

Nein

Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt

Ja

Produkt, das in den USA hergestellt und aus den USA exportiert wird

Nein

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