Abstract
Purpose
To compare advanced non-parallel transmission zoomed diffusion-weighted imaging (nonPTX zoom-DWI) to conventional DWI (conv-DWI) for the assessment of prostate cancer (PCa).
Methods
This retrospective study included 98 patients who underwent conv-DWI, nonPTX zoom-DWI, and T2-weighted imaging of the prostate. The image qualities of the two DWI sets, including the distortion of the prostate and the existence of artifacts, were evaluated. To compare the overall PCa and clinically important PCa (ciPCa) detection ability between the sets, lesions were scored using the Prostate Imaging Reporting and Data System (PI-RADS) version 2. Apparent diffusion coefficient (ADC) values of the lesions were also measured and compared. The Mann–Whitney U test was used to compare continuous variables, and the χ2 test was used to compare categorical variables. Two-sided P values of < 0.05 were considered significant.
Results
Non-PTX zoom-DWI yielded significantly better image quality and image analysis reproducibility than conv-DWI (all P < 0.001). Compared with conv-ADC, nonPTX zoom-ADC showed slightly better detection performance for overall PCa (AUC: 0.827 vs. 0.797; P = 0.55) and ciPCa (AUC: 0.822 vs. 0.749; P = 0.58). At a PI-RADS score of 4 as the cutoff value for PCa prediction, nonPTX zoom-DWI showed significantly higher diagnostic efficiency for overall PCa detection (sensitivity: 87.9% vs. 72.4%; specificity: 87.5% vs. 77.5%; both P < 0.05) and ciPCa detection (sensitivity: 86.3% vs. 74.5%; specificity: 72.3% vs. 63.8%; both P ≤ 0.001).
Conclusion
Non-PTX zoom-DWI yields better image quality and higher PCa detection performance than Conv-DWI.
Graphic Abstract
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Availability of data and material
The datasets generated in this study are available from the corresponding author upon reasonable request.
Code availability
None.
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Funding
This study received funding by Foundation of Peak discipline of Xuhui district (No. SHXH201705), the National Natural Science Foundation of China (Nos. 81901845, 81671791), Science Foundation of Shanghai Jiao tong University Affiliated Sixth People’s Hospital (No. 201818), and Shanghai key discipline of medical imaging (No: 2017ZZ02005).
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Guarantor of integrity of entire study, JZ. Study concepts/study design or data acquisition of data analysis/interpretation, all authors. Manuscript drafting or manuscript revision for important intellectual content, LH. Manuscript final version approval, all authors. Agrees to ensure any questions related to the work are appropriately resolved, all authors. Literature research, LH. Clinical studies, LH and LW. Statistical analysis, LH. Manuscript editing, LH and JZ. All authors have read and approved the final manuscript.
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Fu cai xia and Thomas Benkert were employed by the company Siemens Shenzhen Magnetic Resonance Ltd. The remaining authors declare that the research was conducted in the absence of any commercial or financial relationships that could be construed as a potential conflict of interest.
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Hu, L., Wei, L., Wang, S. et al. Better lesion conspicuity translates into improved prostate cancer detection: comparison of non-parallel-transmission-zoomed-DWI with conventional-DWI. Abdom Radiol 46, 5659–5668 (2021). https://doi.org/10.1007/s00261-021-03268-5
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DOI: https://doi.org/10.1007/s00261-021-03268-5