European Radiology

, Volume 21, Issue 1, pp 188–196

Ultra-high-b-value diffusion-weighted MR imaging for the detection of prostate cancer: evaluation in 201 cases with histopathological correlation

Authors

    • Department of RadiologyKumamoto Chuo Hospital
  • Taro Takahara
    • Department of RadiologyUniversity Medical Center Utrecht
  • Thomas C. Kwee
    • Department of RadiologyUniversity Medical Center Utrecht
  • Seitaro Oda
    • Department of RadiologyKumamoto Chuo Hospital
  • Yasuko Suzuki
    • Department of RadiologyKumamoto Chuo Hospital
  • Shoji Morishita
    • Department of RadiologyKumamoto Chuo Hospital
  • Kosuke Kitani
    • Department of UrologyKumamoto Chuo Hospital
  • Yasuyuki Hamada
    • Department of UrologyKumamoto Chuo Hospital
  • Mitsuhiko Kitaoka
    • Department of PathologyKumamoto Chuo Hospital
  • Yasuyuki Yamashita
    • Department of RadiologyUniversity of Kumamoto
Urogenital

DOI: 10.1007/s00330-010-1883-7

Cite this article as:
Katahira, K., Takahara, T., Kwee, T.C. et al. Eur Radiol (2011) 21: 188. doi:10.1007/s00330-010-1883-7

Abstract

Purpose

To assess the diagnostic performance of diffusion-weighted magnetic resonance (MR) imaging (DWI) for prostate cancer detection, using different b-values.

Methods

A total of 201 patients who underwent MR imaging before total prostatectomy were evaluated. MR images were independently assessed by three radiologists. Three combinations of sequences were separately evaluated, as follows: group 1 [T2-weighted images (T2WI) alone], group 2 (T2WI and DWI with a b-value of 1,000 s/mm2), group 3 (T2WI and DWI with a b-value of 2,000 s/mm2). Whole-mount-section histopathological examination was the reference standard. Areas under the receiver operating characteristic curve (AUCs) and diagnostic performance parameters were determined.

Results

The sensitivity, specificity, and AUC for the detection of prostate cancer were as follows: 52.2%, 80.7%, and 0.694 in group 1; 61.2%, 82.6%, and 0.755 in group 2; 73.2%, 89.7%, and 0.842 in group 3. Group 3 achieved the highest diagnostic performance, followed by group 2 (P < 0.05). In the transition zone, the specificity was lower (P < 0.001) for group 2 (82.2%) than for group 1 (86.2%).

Conclusion

The addition of diffusion-weighted images with a b-value of 2,000 s/mm2 to T2WI can improve the diagnostic performance of MR imaging in prostate cancer detection.

Keywords

Prostate cancerDiffusion-weighted imagingUltra-high b-valueMRIHistopathological correlation

Copyright information

© European Society of Radiology 2010