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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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Multicenter analysis for inter reader agreement of PIQUAL score v2 for basic readers in prostate MRI.

Mujgan Orman1, Sabri Sirolu2, Mustafa Ege Seker3

  • 1Department of Radiology, Acibadem Healthcare Group, Istanbul, 34457, Turkey.

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|July 2, 2025
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Summary

The Prostate Imaging Quality (PI-QUAL) V2 shows improved reliability for assessing multiparametric prostate MRI (mpMRI) quality. This updated tool achieved higher agreement among readers, enhancing its clinical use.

Keywords:
Image qualityMRIPI-QUALProstateProstate Cancer

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Area of Science:

  • Radiology
  • Medical Imaging
  • Oncology

Background:

  • Multiparametric prostate MRI (mpMRI) is crucial for prostate cancer assessment.
  • Standardized image quality assessment is vital for reproducible mpMRI interpretation.
  • The Prostate Imaging Quality (PI-QUAL) V1 was developed to assess mpMRI quality.

Purpose of the Study:

  • To evaluate the inter-reader agreement of the updated Prostate Imaging Quality (PI-QUAL) V2.
  • To compare the performance of PI-QUAL V2 against PI-QUAL V1.
  • To assess the reliability of PI-QUAL V2 among basic prostate MRI readers.

Main Methods:

  • A multicenter study involving five institutions and 274 men undergoing mpMRI.
  • Five readers assessed T2-weighted, DWI (including ADC maps), and DCE images using PI-QUAL V1 and V2.
  • Inter-reader agreement was quantified using weighted Gwet's AC1 coefficients and compared via bootstrapped confidence intervals.

Main Results:

  • PI-QUAL V2 demonstrated higher inter-reader agreement (coefficients 0.821–0.897) compared to PI-QUAL V1 (0.659–0.855).
  • All pairwise comparisons for PI-QUAL V2 achieved almost perfect agreement, versus only 3 of 10 for PI-QUAL V1.
  • Statistically significant improvements were observed with PI-QUAL V2 in three comparisons.

Conclusions:

  • PI-QUAL V2 offers improved inter-reader reliability for assessing mpMRI quality.
  • The updated PI-QUAL V2 demonstrates enhanced clinical applicability and reproducibility.
  • Basic prostate MRI readers can achieve almost perfect agreement using PI-QUAL V2.