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Magnetic Resonance Imaging

Magnetic Resonance Imaging

Magnetic resonance imaging (MRI) is a noninvasive medical imaging technique based on a phenomenon of nuclear physics discovered in the 1930s, in which matter exposed to magnetic fields and radio waves was found to emit radio signals. In 1970, a physician and researcher named Raymond Damadian noticed that malignant (cancerous) tissue gave off different signals than normal body tissue. He applied for a patent for the first MRI scanning device in clinical use by the early 1980s. The early MRI...

Imaging Studies IV: Magnetic Resonance Imaging

Imaging Studies IV: Magnetic Resonance Imaging

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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Updated: Oct 2, 2025

A Cognitive Fusion-guided Prostate Biopsy Using Multiparametric Magnetic Resonance Imaging and Transrectal Ultrasound

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MRI interobserver reliability in rectal tumor angulation.

Malene Rv Pedersen^1,2,3,4, Peter O Otto¹, Helle Precht^2,4,5

¹Department of Radiology, Vejle Hospital, University Hospital of Southern Denmark, Vejle, Denmark.

Acta Radiologica Open

|February 28, 2022

Summary

This summary is machine-generated.

Radiographers can accurately perform magnetic resonance imaging (MRI) rectal tumor angulation, a crucial step for precise cancer measurement. This finding suggests improved consistency in rectal cancer staging through trained radiographers.

Keywords:

Rectal tumor interobserver reliability magnetic resonance imaging radiographer

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Area of Science:

Medical Imaging
Oncology
Radiography

Background:

Accurate measurement of the shortest distance between rectal tumors and the mesorectal fascia using MRI is critical.
This measurement relies on the perpendicular angulation of axial T2-weighted images to the tumor axis.

Purpose of the Study:

To assess the interobserver variability in rectal tumor angulation between radiologists and radiographers.
To evaluate the reliability of radiographers in performing this specific MRI measurement.

Main Methods:

Two observers independently performed rectal tumor angulation on MRI scans.
Magnetic resonance imaging (MRI) examinations were conducted using a 1.5 Tesla unit.
Interobserver variance was analyzed using Bland-Altman plots and Intraclass Correlation Coefficient (ICC).

Main Results:

The study included 55 patients with rectal cancer (45.5% women, 54.5% men), median age 71 years.
The mean rectal tumor length was 3.9 cm.
Good interobserver reliability was found, with an ICC of 0.83 (95% CI: 0.72-0.90).

Conclusions:

Trained radiographers can effectively perform MRI rectal tumor angulation.
This indicates potential for improved consistency and accuracy in rectal cancer imaging by radiographers.