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Related Concept Videos

Imaging Studies IV: Magnetic Resonance Imaging01:27

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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Related Experiment Video

Updated: Jun 6, 2026

A Cognitive Fusion-guided Prostate Biopsy Using Multiparametric Magnetic Resonance Imaging and Transrectal Ultrasound
06:08

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

Published on: March 21, 2025

Prostate contouring in MRI guided biopsy.

Siddharth Vikal1, Steven Haker, Clare Tempany

  • 1School of Computing, Queen's University, Kingston, ON, Canada.

Proceedings of Spie--The International Society for Optical Engineering
|September 28, 2011
PubMed
Summary

This study introduces a fast, semi-automatic algorithm for precise prostate contouring in MRI scans, crucial for cancer detection and staging. The method leverages shape models for accurate 3D segmentation, improving clinical workflow.

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Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy
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Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy

Published on: April 9, 2019

Related Experiment Videos

Last Updated: Jun 6, 2026

A Cognitive Fusion-guided Prostate Biopsy Using Multiparametric Magnetic Resonance Imaging and Transrectal Ultrasound
06:08

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

Published on: March 21, 2025

Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy
09:11

Use of MRI-ultrasound Fusion to Achieve Targeted Prostate Biopsy

Published on: April 9, 2019

Area of Science:

  • Medical Imaging
  • Radiology
  • Computational Anatomy

Background:

  • Magnetic Resonance Imaging (MRI) is increasingly vital for prostate cancer detection and staging.
  • Accurate and rapid prostate segmentation is essential for effective clinical use of MRI.

Purpose of the Study:

  • To develop and validate a semi-automatic algorithm for fast and accurate prostate contouring in MRI.
  • To utilize a priori prostate shape knowledge for robust 3D segmentation.

Main Methods:

  • A semi-automatic algorithm employing a statistical shape model in polar transform space.
  • Contour propagation through neighboring slices with iterative refinement.
  • Template matching for shape guidance, minimizing assumptions on image properties and patient pose.

Main Results:

  • Validated against expert segmentation on clinical MRI data.
  • Achieved a mean absolute distance of 2.0 ± 0.6 mm and a Dice similarity coefficient of 0.93 ± 0.3.
  • Demonstrated processing time of approximately 1 second per slice.

Conclusions:

  • The developed algorithm provides fast and accurate prostate segmentation from MRI.
  • Its robustness and minimal assumptions make it suitable for diverse clinical settings.
  • This method supports efficient MRI-based prostate cancer management.