不同弥散梯度模式对前列腺DWI成像质量的影响

发布时间：2018-05-10 06:51

本文选题：磁共振成像 + 前列腺　；参考：《临床放射学杂志》2017年04期

【摘要】：目的对比3种不同弥散梯度模式下MR扩散加权成像(DWI)的图像质量,探讨最佳的弥散梯度模式。方法采用ALL、3in1、Tetra三种不同弥散梯度模式,前瞻性进行37例前列腺DWI检查,均采用小视野(b值50、800 s/mm~2),根据前列腺DWI图外周带有无高信号结节分为正常组(A组)和病变组(B组),分别对三种模式两组图像进行主观评分,并分别比较信噪比(SNR)、对比噪声比(CNR)和ADC值。结果前列腺正常组20例,病变组17例。A、B两组Tetra模式的SNR和CNR均显著高于3in1模式和ALL模式(P0.05);正常组ALL模式SNR和CNR高于3in1模式,差异有统计学意义(P0.05);病变组ALL模式SNR和CNR与3in1模式相当,差异无统计学意义(P0.05)。Tetra模式图像主观评分显著高于其他两种模式(P0.05);3in1模式评分低于ALL模式,但差异无统计学意义(P0.05);三种模式ADC值无显著差异(P0.05)。结论 Tetra模式是前列腺DWI成像较佳的弥散梯度模式。
[Abstract]:Objective to compare the image quality of diffusion-weighted Mr imaging (DWI) with three diffusion-gradient models and to explore the optimal diffusion gradient model. Methods 37 cases of prostatic DWI were examined prospectively by three different diffusion gradient models of ALL ~ (3 in) ~ (-1) Tetra. The patients were divided into normal group (group A) and lesion group (group B) according to the DWI images of the prostate with no hyperintense nodule. The signal-to-noise ratio (SNR), the contrast noise ratio (CNR) and the ADC value were compared. Results the SNR and CNR of Tetra model were significantly higher in normal prostate group (20 cases) and pathological group (17 cases) than in 3in1 model and ALL model (P0.05), and SNR and CNR in ALL model were higher than that in 3in1 model in normal group. The difference was statistically significant (P 0.05), the SNR and CNR of ALL model were similar to those of 3in1 model, but the subjective score of P0.05 + Tetra model was significantly higher than that of the other two models. The score of SNR and CNR in the pathological group was lower than that in ALL model. But the difference was not statistically significant (P 0.05), and there was no significant difference in ADC values among the three models (P 0.05). Conclusion Tetra model is a good diffusion gradient model for DWI imaging of prostate.
【作者单位】：珠海市人民医院放射科;中山大学附属第五医院影像科;通用电气医疗系统磁共振产品部;
【基金】：珠海市科技计划项目(编号:2015A1023)
【分类号】：R445.2;R697.3;R737.25

【相似文献】