多b值DWI序列检测前列腺癌扩散和灌注信息的初步研究  被引量:20

Detection of perfusion and diffusion informations in prostate cancer using diffusion-weighted intravoxel incoherent motion imaging: preliminary study

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作  者:王岳[1] 蔡文超[1] 叶锦棠[1] Queenie Chan 王霄英[1] 

机构地区:[1]北京大学第一医院医学影像科,北京100034 [2]飞利浦医疗保健事业部

出  处:《实用放射学杂志》2012年第12期1835-1837,共3页Journal of Practical Radiology

摘  要:目的 探讨多b值DWI序列不同b值组合条件下对前列腺癌及非癌组织扩散与灌注信息的检测情况。方法24例经超市引导下前列腺穿刺活检病理证实患者被纳入研究,分为前列腺癌组和非癌组各12例。所有患者均在3.0TMR扫描仪进行了多b值DWI序列(b值分别为0,188.375.563.750s/mm)扫描。分为3个不同b值组合组:组1(0,188,375s/mm^2),组2(0,188,375,563s/mm),组3(0.188,375,563,750s/mm^2)。应用双指数模型(体素内不均一运动法)分析,计算并比较癌区和非癌区的相对纯扩散值D,灌注分数f的差异。结果组1、2、3中癌区和非癌区D值和f值比较均有显著统计学差异(P〈0.01)。组1,前列腺癌区与非癌区D值与f值分别为(0.95±0.11)×10^-3mm^-2/s,(27±6)%和(2.03±0.18)×10^-3mm^-2/s,(9±2.9)%。组2分别为(0.78士0.08)×10^-3mm^-2/s,(15±2.7)%和(1.82±0.19)×10^-3mm^-2/s.(3.7±1.3)%。组3分别为(0.76±0.05)×10^-3mm^-2/s,(16±5.2)%和(1.80±0.24)×10^-3mm^-2/s,(3.4±0.7)%。结论多b值DWI序列可用于检出前列腺癌,并获得D值和f值。通过优化b值组合有可能更有效地提取前列腺癌扩散和灌注信息。Objective To investigate the diffusion and perfusion properly of prostate eancer(PCa) and noncancerous tissue usingmuhi-b value diflusion weighted imaging (DWI) with different b-value combination. Methods Twenty-four patients were divided in to two groups: PCa and non PCa, according to pathological result. All of them undergone the multi-b value DWl examination on a 3.0T scanner. The analysis was conducted using a intravoxel incoherent motion (IVIM) bi exponential model with three b value combination: group 1 (0, 188, 375 s/mm^2), group 2 (0, 188, 375, 563 s/mm^2), group 3(0, 188, 375, 563, 750 s/mm^2). Then the pure diffusion coefficient, (D) and perfusion fraction (f) in the cancerous and noncancerous areas were calculated and compared (independent T tesl). Results The D in the PCa was significantly lower than that of non-PCa areas, while the f wllue was higher(both P〈0.01). In group 1, the D and f value of cancerous and noncancerous region were (0.95±0.11)×10^-3mm^2/s, (27±6) and (2.0±0. 18)×10^-3mm^2/s, (9±2.9)%. In group 2, the D and f value of cancerous and noncancerous region were (0.78± 0.08)×10^-3mm^2/s, (15±2.7)% and (1.82±0. 19)×10^-3mm^2/s, (3.7±1.3)%. lngroup 3, theDand f value of cancerous and noncancerous region were (0.76±0.05)×10^-3mm^2/s, (16±5.2)% and (1.80±0.24)×10^-3mm^2/s, (3.4±0.7)%.Conclusion The IVIM multi b value DWI can extract the diffusion and perfusion characteristics of prostatecancer. The diagnosis performance ofMRI in PCa maybe improved by optimizing the b combination.

关 键 词:前列腺癌 磁共振成像 扩散加权成像 体素内不均一运动 

分 类 号:R737.25[医药卫生—肿瘤] R445.2[医药卫生—临床医学]

 

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