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.
調査の概要
研究の種類
入学 (推定)
段階
- 適用できない
連絡先と場所
研究連絡先
- 名前:Rui Ji, MD PHD
- 電話番号:+86-18560086103
- メール:qljirui@email.sdu.edu.cn
研究場所
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Shandong
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Jinan、Shandong、中国、250012
- Qilu Hospital of Shandong University
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コンタクト:
- Rui Ji, MD PHD
- 電話番号:+86-18560086103
- メール:qljirui@email.sdu.edu.cn
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-
参加基準
適格基準
就学可能な年齢
- 大人
- 高齢者
健康ボランティアの受け入れ
説明
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
研究計画
研究はどのように設計されていますか?
デザインの詳細
- 主な目的:診断
- 割り当て:ランダム化
- 介入モデル:クロスオーバー割り当て
- マスキング:独身
武器と介入
参加者グループ / アーム |
介入・治療 |
|---|---|
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実験的: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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アクティブコンパレータ: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.
|
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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この研究は何を測定していますか?
主要な結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Image Quality Quantification by Edge Detection Analysis
時間枠: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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二次結果の測定
結果測定 |
メジャーの説明 |
時間枠 |
|---|---|---|
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Subjective Image Quality Assessment by Blinded Expert Review
時間枠: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
時間枠: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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協力者と研究者
スポンサー
研究記録日
主要日程の研究
研究開始 (推定)
一次修了 (推定)
研究の完了 (推定)
試験登録日
最初に提出
QC基準を満たした最初の提出物
最初の投稿 (実際)
学習記録の更新
投稿された最後の更新 (実際)
QC基準を満たした最後の更新が送信されました
最終確認日
詳しくは
本研究に関する用語
その他の研究ID番号
- KYLL-2026-01(YJ)-072
医薬品およびデバイス情報、研究文書
米国FDA規制医薬品の研究
米国FDA規制機器製品の研究
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