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Related Concept Videos

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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Magnetic Resonance Imaging01:24

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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...
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Related Experiment Video

Updated: Sep 14, 2025

A Cognitive Fusion-guided Prostate Biopsy Using Multiparametric Magnetic Resonance Imaging and Transrectal Ultrasound
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Predicting uninformative prostate magnetic resonance imaging sequences: a hypothesis-generating pilot study.

Negar Firoozeh1, Spencer C Behr2, Antonio C Westphalen1

  • 1University of Washington, Seattle, WA, USA.

Radiologia Brasileira
|July 21, 2025
PubMed
Summary
This summary is machine-generated.

Diffusion-weighted imaging (DWI) is a better predictor of negative multiparametric MRI scans than T2-weighted imaging (T2WI). A negative DWI result can indicate a completely negative examination, potentially streamlining prostate cancer diagnosis.

Keywords:
Magnetic resonance imaging/methodsProstate/diagnostic imagingProstatic neoplasms

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Area of Science:

  • Radiology
  • Oncology
  • Medical Imaging

Background:

  • Multiparametric magnetic resonance imaging (mpMRI) is crucial for prostate cancer diagnosis.
  • Assessing the negative predictive value of individual MRI sequences can optimize diagnostic workflows.

Purpose of the Study:

  • To determine the proportion of men with completely negative mpMRI scans.
  • To identify which sequence, T2-weighted imaging (T2WI) or diffusion-weighted imaging (DWI), best predicts an overall negative examination.

Main Methods:

  • Retrospective analysis of 492 PI-RADS v2.1 compliant mpMRI scans.
  • Radiology reports were reviewed for lesion absence or PI-RADS scores.
  • Negative scans were prospectively reviewed against PI-RADS criteria.
  • Chi-square tests and logistic regression analyzed the predictive value of T2WI and DWI.

Main Results:

  • A negative T2WI predicted negative DWI/DCE in 62.4% of scans (OR 245.3, p < 0.001).
  • A negative DWI predicted negative T2WI/DCE in 88.9% of scans (OR 76.4, p < 0.001).
  • These associations remained significant after adjusting for clinical factors.

Conclusions:

  • T2WI and DWI findings can serve as preliminary indicators for overall mpMRI results.
  • DWI demonstrates a slight advantage in predicting a negative overall examination.
  • Further research is warranted for potential clinical implementation.