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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.
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 IV: Magnetic Resonance Imaging01:27

Imaging Studies IV: Magnetic Resonance Imaging

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Introduction:Magnetic Resonance Imaging, or MRI, can include a specialized imaging technique of the urinary system known as Magnetic Resonance Urography (MRU). This radiation-free technique uses strong magnetic fields and radio waves to produce detailed images with the help of a computer. MRU is particularly effective for visualizing fluid-filled structures like the kidneys, ureters, and bladder.Applications of MRI in the Genitourinary SystemKidneys and Ureters: MRI detects tumors, cysts,...
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Imaging Studies II: Ultrasonography01:24

Imaging Studies II: Ultrasonography

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IntroductionUltrasonography, or renal ultrasound, is a noninvasive medical imaging technique that uses high-frequency sound waves to visualize the kidneys, ureters, bladder, and surrounding tissues.Indications for Urinary System UltrasonographyUrinary system ultrasonography is indicated in various clinical scenarios, such as:Kidney Stones (Urolithiasis): To detect and monitor the size and presence of kidney or urinary tract stones.Hydronephrosis: To assess the dilation of the renal pelvis and...
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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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Imaging Studies V: Intravenous Urography and Retrograde Pyelography01:22

Imaging Studies V: Intravenous Urography and Retrograde Pyelography

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IntroductionIntravenous Urography (IVU) and Retrograde Pyelography (RP) are important diagnostic imaging techniques used to evaluate the urinary system. These methods help identify structural abnormalities, obstructions, and functional issues in the kidneys, ureters, and bladder. Both procedures use iodine-based contrast media to enhance the visibility of urinary tract structures on X-ray images, though they differ in their methods and indications.1. Intravenous Urography (IVU)Intravenous...
274
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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Updated: Oct 15, 2025

Quantification of Levator Ani Hiatus Enlargement by Magnetic Resonance Imaging in Males and Females with Pelvic Organ Prolapse
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[MR Imaging Diagnostics in Proctology].

Andreas Christe1

  • 1Radiologie, Stadtspital und Landspitäler, Universitätsinstitut für Diagnostische, Interventionelle und Pädiatrische Radiologie (DIPR).

Therapeutische Umschau. Revue Therapeutique
|October 27, 2021
PubMed
Summary
This summary is machine-generated.

Magnetic Resonance (MR) imaging is a valuable tool in proctology for staging rectal cancer, assessing inflammatory bowel disease, and performing defecography. MR imaging offers high accuracy in staging rectal cancer and visualizing perirectal conditions.

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Area of Science:

  • Radiology
  • Gastroenterology
  • Pelvic Floor Imaging

Background:

  • MR imaging offers superior soft-tissue contrast crucial for proctological diagnostics.
  • Key applications include rectal cancer staging, inflammatory bowel disease assessment, and defecography.

Purpose of the Study:

  • To highlight the diagnostic capabilities of MR imaging in proctology.
  • To detail the accuracy and applications of MR imaging in specific proctological conditions.

Main Methods:

  • Review of MR imaging applications in rectal cancer staging.
  • Utilizing MR imaging for assessment of chronic inflammatory bowel disease.
  • Employing MR imaging-cine sequences for dynamic defecography.

Main Results:

  • MR imaging demonstrates high accuracy (75-95%) for T-stage and (71-85%) for N-stage rectal cancer classification.
  • MR imaging effectively depicts perirectal abscesses, fistulas, and monitors inflammatory bowel disease activity.
  • Dynamic MR defecography visualizes pelvic floor dynamics, anismus, descensus, incontinence, rectocele, and enterocele.

Conclusions:

  • MR imaging is a versatile and accurate diagnostic modality in proctology.
  • Its applications span from oncologic staging to functional pelvic floor assessment.