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Related Concept Videos

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

Imaging Studies III: Gastrointestinal Motility Studies and Virtual Colonoscopy

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This lesson explores three gastrointestinal imaging techniques: radionuclide testing, colonic transit studies, and virtual colonoscopy.
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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...
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Endoscopic Procedures II: Colonoscopy01:25

Endoscopic Procedures II: Colonoscopy

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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:
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Imaging Studies I: CT and MRI01:14

Imaging Studies I: CT and MRI

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Introduction: MRI and CT scans are crucial advancements in medical imaging techniques, playing a vital role in diagnosing conditions related to the gastrointestinal (GI) system. Each scan serves distinct purposes, targets specific areas, and requires unique nursing duties.
Description of the Procedures
Computed Tomography (CT) scan:
Computed Tomography (CT) scans use X-ray technology to generate detailed images of bones, organs, and tissues. During the scan, the patient lies on a moving table...
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Assessment of the Rectum and Anus01:25

Assessment of the Rectum and Anus

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Evaluating the rectum and anus plays a crucial role in conducting a thorough physical examination of the gastrointestinal system. Although it may be uncomfortable and often embarrassing for the patient, it holds immense diagnostic value, particularly in detecting gastrointestinal diseases and abnormalities. This guide will explain how to perform this assessment using inspection and palpation methods.
Rectal Inspection
Begin by inspecting the perianal and anal areas for color, texture, rashes,...
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Lower GI Series: Barium Enema01:23

Lower GI Series: Barium Enema

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A Barium Enema, or a lower GI series, is a specialized radiographic examination designed to visualize the lower gastrointestinal tract, specifically the colon and rectum. This procedure is instrumental in diagnosing various conditions such as colorectal cancer, polyps, diverticulosis, and inflammatory bowel disease.
Procedure Details
The examination begins by inserting a lubricated rectal tube into the patient's rectum to administer a radiopaque barium solution. The barium flow is carefully...
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Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy01:26

Endoscopic Procedures IV: Sigmoidoscopy and Laproscopy

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Sigmoidoscopy and laparoscopy are distinct medical procedures that enable physicians to internally inspect different parts of the GI tract. Although they serve different purposes, each is essential for diagnosing and, in some cases, treating various medical conditions.
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Updated: Apr 21, 2026

Murine Endoscopy for In Vivo Multimodal Imaging of Carcinogenesis and Assessment of Intestinal Wound Healing and Inflammation
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Recent developments in colorectal imaging.

Perry J Pickhardt1

  • 1Department of Radiology, University of Wisconsin School of Medicine & Public Health, Madison, Wisconsin, USA.

Current Opinion in Gastroenterology
|November 14, 2014
PubMed
Summary
This summary is machine-generated.

Recent advances in radiologic colorectal imaging, including magnetic resonance (MR) and computed tomography colonography (CTC), enhance the detection, staging, and surveillance of colorectal neoplasia.

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

  • Radiology
  • Gastroenterology
  • Oncology

Background:

  • Colorectal neoplasia poses a significant health burden.
  • Accurate imaging is crucial for early detection, staging, and monitoring treatment response.
  • Traditional imaging modalities have limitations in evaluating complex colorectal pathologies.

Purpose of the Study:

  • To review recent advancements in radiologic imaging techniques for colorectal neoplasia.
  • To highlight progress in magnetic resonance (MR) imaging, computed tomography colonography (CTC), and positron emission tomography (PET).
  • To emphasize the impact of these advances on detection, staging, and surveillance.

Main Methods:

  • Review of recent literature on cross-sectional and functional imaging of the colorectum.
  • Focus on magnetic resonance (MR) imaging, computed tomography colonography (CTC), and positron emission tomography (PET).
  • Evaluation of imaging for detection, staging, and surveillance of colorectal neoplasia.

Main Results:

  • Substantial progress in MR imaging, particularly for assessing rectal cancer response to neoadjuvant therapy.
  • Continued maturation and clinical validation of CTC for evaluating advanced colorectal neoplasia.
  • Significant strides in multimodality imaging incorporating functional PET data.

Conclusions:

  • Recent advances in cross-sectional and functional radiologic imaging offer improved noninvasive evaluation of colorectal neoplasia.
  • These technological improvements are expected to enhance clinical capabilities in managing colorectal cancer.
  • The integration of advanced imaging techniques promises better patient outcomes.