- ICH GCP
- US-Register für klinische Studien
- Klinische Studie NCT07664813
One-Click Autofocus Versus Segmented Focus in Gastric Endoscopy
A Comparative Study of One-Click Autofocus Versus Segmented Focus Techniques Under Magnifying Endoscopy for Gastric Diseases: A Tandem Randomized Controlled Trial
Magnifying endoscopy provides high-resolution images that enhance the detection of early gastrointestinal lesions. However, conventional manual zoom techniques require frequent focal adjustments, which can be technically demanding and may compromise image stability, especially in complex anatomical settings.
This study evaluates a novel one-click autofocus system based on image recognition and computer vision algorithms. The system automatically adjusts focal distance within seconds, eliminating the need for manual operation. This trial aims to compare the efficiency and image quality of one-click autofocus versus segmented manual focus in patients undergoing magnifying endoscopy for gastric diseases.
A tandem randomized controlled trial will be conducted to assess procedure time, image clarity score, and operator satisfaction between the two techniques.
Studienübersicht
Status
Bedingungen
Intervention / Behandlung
Studientyp
Einschreibung (Geschätzt)
Phase
- Unzutreffend
Kontakte und Standorte
Studienkontakt
- Name: Rui Ji, MD PHD
- Telefonnummer: +86-18560086103
- E-Mail: qljirui@email.sdu.edu.cn
Studienorte
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Shandong
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Jinan, Shandong, China, 250012
- Qilu Hospital of Shandong University
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Kontakt:
- Rui Ji, MD PHD
- Telefonnummer: +86-18560086103
- E-Mail: qljirui@email.sdu.edu.cn
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Teilnahmekriterien
Zulassungskriterien
Studienberechtigtes Alter
- Erwachsene
- Älterer Erwachsener
Akzeptiert gesunde Freiwillige
Beschreibung
Inclusion Criteria:
- Age ≥ 18 years
- Patients with gastric diseases (e.g., suspicious lesions, known gastric disorders) requiring further magnifying endoscopy examination
- Ability to understand and provide written informed consent voluntarily
Exclusion Criteria:
- Absolute contraindications to upper gastrointestinal endoscopy (e.g., severe cardiopulmonary insufficiency, coagulopathy)
- Pregnant or lactating women
- History of gastric surgery (e.g., gastrectomy) that may affect endoscopic manipulation or anatomy
Studienplan
Wie ist die Studie aufgebaut?
Designdetails
- Hauptzweck: Diagnose
- Zuteilung: Zufällig
- Interventionsmodell: Crossover-Aufgabe
- Maskierung: Single
Waffen und Interventionen
Teilnehmergruppe / Arm |
Intervention / Behandlung |
|---|---|
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Experimental: One-Click Autofocus followed by Segmented Focus
Participants receive one-click autofocus examination first, followed by segmented focus examination.
Both examinations are performed during the same endoscopic session.
The order of the two techniques is randomized.
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Magnifying endoscopy examination performed using the one-click autofocus mode.
The system automatically adjusts focus to the optimal plane with a single button press.
Magnifying endoscopy examination performed using the segmented focus mode.
The endoscopist manually adjusts the focus level stepwise through multiple pre-set focal planes.
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Aktiver Komparator: Segmented Focus followed by One-Click Autofocus
Participants receive segmented focus examination first, followed by one-click autofocus examination.
Both examinations are performed during the same endoscopic session.
The order of the two techniques is randomized.
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Magnifying endoscopy examination performed using the one-click autofocus mode.
The system automatically adjusts focus to the optimal plane with a single button press.
Magnifying endoscopy examination performed using the segmented focus mode.
The endoscopist manually adjusts the focus level stepwise through multiple pre-set focal planes.
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Was misst die Studie?
Primäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Image Quality Quantification by Edge Detection Analysis
Zeitfenster: Day 1 (During the endoscopic examination)
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Image quality is objectively quantified using edge detection analysis applied to standardized images captured by each technique.
The standard deviation of pixel intensity after edge detection processing is used as the quantitative metric.
A higher standard deviation indicates higher image contrast and edge definition, reflecting superior image quality.
All image analyses are performed offline by an independent researcher blinded to the technique used.
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Day 1 (During the endoscopic examination)
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Sekundäre Ergebnismessungen
Ergebnis Maßnahme |
Maßnahmenbeschreibung |
Zeitfenster |
|---|---|---|
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Subjective Image Quality Assessment by Blinded Expert Review
Zeitfenster: Day 1 (During the endoscopic examination)
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Image quality is subjectively assessed by two to three independent expert reviewers blinded to the technique used.
Recorded videos of magnifying endoscopy examinations are reviewed offline and scored using a 5-point Likert scale, where 1 = poor and 5 = excellent.
Higher scores indicate superior image quality.
The final score for each image is the average of the reviewers' scores.
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Day 1 (During the endoscopic examination)
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Image Acquisition Time per Capture
Zeitfenster: Day 1 (During the endoscopic examination)
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Time (in seconds) measured for each image acquisition, defined as the duration from the moment the endoscope makes contact with the target gastric mucosa to the capture of the final magnified image for each technique.
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Day 1 (During the endoscopic examination)
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Mitarbeiter und Ermittler
Sponsor
Studienaufzeichnungsdaten
Haupttermine studieren
Studienbeginn (Geschätzt)
Primärer Abschluss (Geschätzt)
Studienabschluss (Geschätzt)
Studienanmeldedaten
Zuerst eingereicht
Zuerst eingereicht, das die QC-Kriterien erfüllt hat
Zuerst gepostet (Tatsächlich)
Studienaufzeichnungsaktualisierungen
Letztes Update gepostet (Tatsächlich)
Letztes eingereichtes Update, das die QC-Kriterien erfüllt
Zuletzt verifiziert
Mehr Informationen
Begriffe im Zusammenhang mit dieser Studie
Schlüsselwörter
Zusätzliche relevante MeSH-Bedingungen
Andere Studien-ID-Nummern
- KYLL-2026-01(YJ)-072
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Studiert ein von der US-amerikanischen FDA reguliertes Arzneimittelprodukt
Studiert ein von der US-amerikanischen FDA reguliertes Geräteprodukt
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