Comparison of synthesized and acquired high b-value diffusion-weighted MRI for detection of prostate cancer

被引:1
作者
Kallis, Karoline [2 ]
Conlin, Christopher C. [1 ]
Zhong, Allison Y. [2 ]
Hussain, Troy S. [2 ]
Chatterjee, Aritrick [6 ,7 ]
Karczmar, Gregory S. [6 ,7 ]
Rakow-Penner, Rebecca [1 ]
Dale, Anders M. [1 ,3 ,4 ]
Seibert, Tyler M. [1 ,2 ,5 ]
机构
[1] Univ Calif San Diego Hlth, Dept Radiol, San Diego, CA 92093 USA
[2] Univ Calif San Diego Hlth, Dept Radiat Med & Appl Sci, La Jolla, CA 92093 USA
[3] Univ Calif San Diego Hlth, Dept Neurosci, San Diego, CA USA
[4] Univ Calif San Diego, Halicioglu Data Sci Inst, San Diego, CA USA
[5] Univ Calif San Diego, Jacobs Sch Engn, Dept Bioengn, San Diego, CA 92093 USA
[6] Univ Chicago, Dept Radiol, Chicago, IL USA
[7] Univ Chicago, Sanford J Grossmann Ctr Excellence Prostate Imagin, Chicago, IL USA
基金
美国国家卫生研究院;
关键词
Diffusion-weighted imaging; Prostate cancer; Synthetic high b-values; Restricted Spectrum Imaging; FEASIBILITY; DIAGNOSIS; PERFUSION; IMAGES; TISSUE; DWI;
D O I
10.1186/s40644-024-00723-6
中图分类号
R73 [肿瘤学];
学科分类号
100214 ;
摘要
Background High b-value diffusion-weighted images (DWI) are used for detection of clinically significant prostate cancer (csPCa). This study qualitatively and quantitatively compares synthesized DWI (sDWI) to acquired (aDWI) for detection of csPCa. Methods One hundred fifty-one consecutive patients who underwent prostate MRI and biopsy were included in the study. Axial DWI with b = 0, 500, 1000, and 2000 s/mm(2) using a 3T clinical scanner using a 32-channel phased-array body coil were acquired. We retrospectively synthesized DWI for b = 2000 s/mm(2) via extrapolation based on mono-exponential decay, using b = 0 and b = 500 s/mm(2) (sDWI(500)) and b = 0, b = 500 s/mm(2), and b = 1000 s/mm(2) (sDWI(1000)). Differences in signal intensity between sDWI and aDWI were evaluated within different regions of interest (prostate alone, prostate plus 5 mm, 30 mm and 70 mm margin and full field of view). The maximum DWI value within each ROI was evaluated for prediction of csPCa. Classification accuracy was compared to Restriction Spectrum Imaging restriction score (RSIrs), a previously validated biomarker based on multi-exponential DWI. Discrimination of csPCa was evaluated via area under the receiver operating characteristic curve (AUC). Results Within the prostate, mean +/- standard deviation of percent mean differences between sDWI and aDWI signal were -46 +/- 35% for sDWI(1000) and -67 +/- 24% for sDWI(500). AUC for aDWI, sDWI(500,) sDWI(1000), and RSIrs within the prostate 0.62[95% confidence interval: 0.53, 0.71], 0.63[0.54, 0.72], 0.65[0.56, 0.73] and 0.78[0.71, 0.86], respectively. Conclusions DWI is qualitatively comparable to aDWI within the prostate. However, hyperintense artifacts are introduced with sDWI in the surrounding pelvic tissue that interfere with quantitative cancer detection and might mask metastases. In the prostate, RSIrs yields superior quantitative csPCa detection than sDWI or aDWI.
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页数:11
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