Diagnostic value of computed high b-value whole-body diffusion-weighted imaging for primary prostate cancer

Yuki Arita, Soichiro Yoshida, Yuma Waseda, Taro Takahara, Chikako Ishii, Ryo Ueda, Thomas C. Kwee, Kei Miyahira, Ryota Ishii, Shigeo Okuda, Masahiro Jinzaki, Yasuhisa Fujii

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1 Citation (Scopus)

Abstract

Purpose: To investigate the utility of post-acquisition computed diffusion-weighted imaging (cDWI) for primary prostate cancer (PCa) evaluation in biparametric whole-body MRI (bpWB-MRI). Methods: Patients who underwent pelvic MRI for PCa screening and subsequent bpWB-MRI for staging were included. Two radiologists assessed the diagnostic performance of the following datasets for clinically significant PCa diagnosis (grade group ≥2 according to the Prostate Imaging-Reporting and Data System, version 2.1): bpMRI2000 (axial DWI scans with a b-value of 2,000 s/mm2 + axial T2WI scans from pre-biopsy pelvic MRI), computed bpWB-MRI2000 (computed WB-DWI scans with a b-value of 2,000 s/mm2 + axial WB-T2WI scans), and native bpWB-MRI1000 (native axial WB-DWI scans with a b-value of 1,000 s/mm2 + axial WB-T2WI scans). Systemic biopsy was used as reference standard. Results: Fifty-one patients with PCa were included. The areas under the curve (AUCs) of bpMRI2000 (0.89 for reader 1 and 0.86 for reader 2) and computed bpWB-MRI2000 (0.86 for reader 1 and 0.83 for reader 2) were significantly higher (p < 0.001) than those of native bpWB-MRI1000 (0.67 for both readers). No significant difference was observed between the AUCs of bpMRI2000 and computed bpWB-MRI2000 (p = 0.10 for reader 1 and p = 0.25 for reader 2). Conclusions: The diagnostic performance of computed bpWB-MRI2000 was similar to that of dedicated pelvic bpMRI2000 for primary PCa evaluation. cDWI can be recommended for implementation in standard WB-MRI protocols to facilitate a one-step evaluation for concurrent detection of primary and metastatic PCa.

Original languageEnglish
Article number109581
JournalEuropean Journal of Radiology
Volume137
DOIs
Publication statusPublished - 2021 Apr

Keywords

  • Diffusion-weighted magnetic resonance imaging
  • Magnetic resonance imaging
  • Prostate cancer
  • Whole-body imaging

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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