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関連する概念動画

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy01:26

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

512
This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
Radionuclide Testing
Radionuclide testing is a sophisticated medical technique for assessing gastrointestinal motility. It focuses on gastric emptying and colonic transit time. Radioactive markers track the movement of food through the digestive system, providing insights into gastrointestinal disorders.
In gastric emptying studies, a meal's liquid and...
512
Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

910
The colon, or large intestine, is the final segment of the digestive system. Its primary functions include absorbing water and vitamins produced by gut bacteria and transforming waste from liquid to solid to form stool. In adults, the large intestine is approximately 5 feet long and consists of four main sections:
910
Uniform Depth Channel Flow: Problem Solving01:18

Uniform Depth Channel Flow: Problem Solving

560
To calculate the flow rate for a trapezoidal channel, first, identify the bottom width, side slope, and flow depth of the channel. The cross-sectional area (A) corresponding to the depth of flow (y), channel bottom width (B), and side slope (θ) is determined by:Next, calculate the wetted perimeter, which includes the bottom width and the sloped side lengths in contact with the water. Using the values of the cross-sectional area and the wetted perimeter, determine the hydraulic radius by...
560
Uniform Depth Channel Flow01:27

Uniform Depth Channel Flow

680
Uniform depth channel flow keeps fluid depth consistent along channels such as irrigation canals. In natural channels, such as rivers, approximate uniform flow is often assumed. This condition occurs when the channel’s bottom slope matches the energy slope, balancing potential energy lost from gravity with head loss due to shear stress. This balance prevents depth changes along the channel length, resulting in a steady, uniform flow.Uniform flow in open channels with a constant cross-section...
680
Endoscopic Procedures III: Video Capsule Endoscopy01:28

Endoscopic Procedures III: Video Capsule Endoscopy

1.0K
Capsule endoscopy, or wireless or video capsule endoscopy, is a diagnostic procedure for examining the entire gastrointestinal tract. Patients swallow a capsule about the size of a vitamin tablet. The capsule is equipped with a transmitter, a battery, an LED light source, and a color video camera to capture images throughout the gastrointestinal tract. This procedure is particularly useful for diagnosing conditions such as Crohn's disease, ulcerative colitis, tumors, polyps, ulcers,...
1.0K
Assessment of Diffusion and Perfusion01:17

Assessment of Diffusion and Perfusion

1.9K
Understanding and evaluating diffusion and perfusion is critical in assessing a patient's respiratory and circulatory health. These processes play key roles in maintaining the body's internal environment, ensuring that tissues receive adequate oxygen while waste products are efficiently removed.
The Role of Diffusion in Respiration
Diffusion is the process by which molecules move from an area of higher concentration to an area of lower concentration. In the respiratory system, this...
1.9K

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関連する実験動画

Updated: Feb 28, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
03:43

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists

Published on: July 11, 2025

854

ColonCrafter：拡散事前情報を用いた結腸内視鏡ビデオのための深度推定モデル

Romain Hardy1, Tyler M Berzin2, Pranav Rajpurkar1

  • 1Department of Biomedical Informatics, Harvard Medical School, USA.

Pacific Symposium on Biocomputing. Pacific Symposium on Biocomputing
|February 27, 2026
PubMed
まとめ

ColonCrafterは、3D再構成のために結腸内視鏡ビデオから正確な深度マップを生成する新しいAIモデルです。時間的整合性を確保し、内視鏡検査における3Dシーン理解を向上させます。

キーワード:
結腸内視鏡検査深度推定3D再構成コンピュータビジョン人工知能医療画像処理拡散モデル

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Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
15:49

Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System

Published on: October 16, 2013

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Video Imaging and Spatiotemporal Maps to Analyze Gastrointestinal Motility in Mice
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Video Imaging and Spatiotemporal Maps to Analyze Gastrointestinal Motility in Mice

Published on: February 3, 2016

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関連する実験動画

Last Updated: Feb 28, 2026

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists
03:43

Structured Approach to Colonoscopy Technique Optimization: A Single-Center Experience with Novice Endoscopists

Published on: July 11, 2025

854
Flexible Colonoscopy in Mice to Evaluate the Severity of Colitis and Colorectal Tumors Using a Validated Endoscopic Scoring System
15:49

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Published on: October 16, 2013

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Video Imaging and Spatiotemporal Maps to Analyze Gastrointestinal Motility in Mice
07:41

Video Imaging and Spatiotemporal Maps to Analyze Gastrointestinal Motility in Mice

Published on: February 3, 2016

14.8K

科学分野:

  • 医用画像処理
  • コンピュータビジョン
  • 人工知能

背景:

  • 結腸内視鏡検査における正確な3Dシーン理解は重要ですが、困難です。
  • 既存の深度推定モデルは、3D再構成のための時間的整合性が欠如しています。

研究 の 目的:

  • 単眼結腸内視鏡ビデオのための時間的に整合性のとれた深度推定モデルを開発すること。
  • 内視鏡検査における堅牢な3Dシーン理解と再構成を可能にすること。

主な方法:

  • 拡散ベースの深度推定モデルであるColonCrafterを開発しました。
  • 幾何学的事前情報を学習するために合成結腸内視鏡シーケンスを利用しました。
  • 臨床ビデオのドメイン適応のためにスタイル変換技術を実装しました。

主要な成果:

  • ColonCrafterはC3VDデータセットで最先端のゼロショットパフォーマンスを達成しました。
  • 一般的な目的および内視鏡検査固有の方法と比較して優れたパフォーマンスを示しました。
  • 3D点群生成および表面被覆評価などの臨床的に関連のあるアプリケーションを実証しました。

結論:

  • ColonCrafterは結腸内視鏡検査のための時間的に整合性のとれた深度マップを提供します。
  • このモデルは、内視鏡検査における3D再構成のための大きな進歩を提供します。
  • 将来の研究では、完全な軌跡の3D再構成の課題に取り組む可能性があります。