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Related Concept Videos

Computed Tomography01:10

Computed Tomography

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Tomography refers to imaging by sections. Computed tomography (CT) is a non-invasive imaging technique that uses computers to analyze several cross-sectional X-rays to reveal minute details about structures in the body.
The technique was invented in the 1970s and is based on the principle that as X-rays pass through the body, they are absorbed or reflected at different levels. In the technique, a patient lies on a motorized platform while a computerized axial tomography (CAT) scanner rotates...
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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.
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...
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Imaging Studies III: Computed Tomography01:27

Imaging Studies III: Computed Tomography

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DefinitionComputed Tomography (CT) of the genitourinary (GU) tract is a non-invasive imaging modality that utilizes X-rays and computer processing to generate detailed cross-sectional images of the urinary system, encompassing the kidneys, ureters, bladder, and adjacent structures such as the adrenal glands.PurposeCT scans of the GU tract serve several diagnostic and therapeutic purposes, including:Diagnosis of Urinary Tract Diseases: Detects kidney stones, tumors, cysts, and congenital...
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Imaging Studies for Cardiovascular System V: CT01:28

Imaging Studies for Cardiovascular System V: CT

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Cardiac computed tomography (CT) scanning is an advanced cardiac imaging technique that utilizes CT technology, with or without intravenous (IV) contrast, to produce accurate cross-sectional virtual slices of specific areas of the heart, coronary circulation, and major blood vessels such as the aorta, pulmonary veins, and arteries. The computer processes these slices to generate three-dimensional images. Multidetector CT (MDCT) is a rapid form of CT scanning that captures multiple slices...
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Imaging Studies VI: Voiding Cystourethrography and Cystography01:22

Imaging Studies VI: Voiding Cystourethrography and Cystography

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Voiding Cystourethrography (VCUG) and Cystography are specialized radiographic procedures used to examine the structure and function of the bladder and urethra.Voiding Cystourethrography (VCUG)A Voiding Cystourethrogram (VCUG) is a diagnostic imaging procedure that assesses the anatomy and function of the lower urinary tract. It focuses on the bladder, bladder neck, and urethra, helping detect abnormalities such as vesicoureteral reflux (VUR)—the backward or reverse flow of urine into the...
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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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Related Experiment Video

Updated: May 2, 2026

Image Rendering Techniques in Postmortem Computed Tomography: Evaluation of Biological Health and Profile in Stranded Cetaceans
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[Computed tomographic colonography].

Johanna Virtanen1, Eila Lantto2

  • 1TYKS, A-röntgen, Varsinais-Suomen Kuvantamiskekus.

Duodecim; Laaketieteellinen Aikakauskirja
|February 20, 2014
PubMed
Summary
This summary is machine-generated.

Computed tomographic colonography (CTC) is a preferred colon examination, detecting cancer with 96% sensitivity. This convenient CT scan also assesses other abdominal organs with a lower perforation risk than colonoscopy.

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Area of Science:

  • Medical Imaging
  • Gastroenterology
  • Oncology

Background:

  • Computed tomographic colonography (CTC) has largely supplanted double-contrast colonography for colon examinations.
  • Adequate bowel preparation, including distention, is crucial for successful CTC.
  • CTC offers a high sensitivity for cancer detection.

Purpose of the Study:

  • To evaluate the efficacy and patient experience of computed tomographic colonography.
  • To compare CTC with conventional colonoscopy and double-contrast colonography.
  • To highlight the advantages of CTC in colon cancer screening and diagnosis.

Main Methods:

  • Review of computed tomographic colonography procedures and outcomes.
  • Comparison of cancer detection rates between CTC and colonoscopy.
  • Assessment of procedural risks and patient convenience.

Main Results:

  • CTC demonstrates a cancer detection sensitivity of 96%, comparable to colonoscopy.
  • CTC allows for the simultaneous evaluation of extracolonic abdominal organs.
  • The risk of bowel perforation is lower with CTC than with conventional colonoscopy.
  • CT examination is more convenient for patients compared to conventional endoscopy.

Conclusions:

  • Computed tomographic colonography is a highly sensitive and convenient method for colon examination and cancer detection.
  • CTC provides additional benefits by enabling assessment of extracolonic organs.
  • The reduced risk of perforation makes CTC a safer alternative to conventional colonoscopy.