| 郭雪梅,王霄英,崔志伟,李飞宇,蒋学祥.以直肠内线圈进行前列腺扩散加权成像的可行性研究[J].中国医学影像技术,2008,24(4):581~584 |
| 以直肠内线圈进行前列腺扩散加权成像的可行性研究 |
| Endorectal diffusion-weighted imaging of prostate: feasibility study |
| 投稿时间：2007-10-09 修订日期：2007-11-09 |
| DOI： |
| 中文关键词: 前列腺 磁共振成像 直肠内线圈 |
| 英文关键词:Prostate Magnetic resonance imaging Endorectal coil |
| 基金项目: |
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| 中文摘要: |
| 目的 以腹部相控阵线圈获得的前列腺常规DWI成像为标准,研究以1.5T磁共振系统进行直肠内线圈DWI成像所得前列腺ADC值的准确性。方法 随机选择20例同时进行了常规DWI和直肠内DWI的前列腺病例,比较两种DWI图像的空间分辨率和信噪比。以第三方软件逐点测量前列腺的ADC值,并手动测量ADC值,与常规方法所得ADC值进行对比,分析直肠内线圈所得ADC值的可用性。结果 直肠内DWI的空间分辨率明显高于常规DWI,两种DWI信噪比无显著性差异。观察获得的散点图,发现与直肠内线圈表面相距22.9 mm以内的ADC值与常规ADC值差异不大。在前列腺外周带手工测量两种ADC值,无统计学差异,相关系数为0.820。 结论 前列腺直肠内线圈DWI图像分辨率高,但仅距离线圈前表面约22.9 mm以内的ADC值与常规ADC值具有可比性。 |
| 英文摘要: |
| Objective To study the feasibility of 1.5T endorectal diffusion weighted imaging of prostate gland, compared with DWI obtained by phase array coil. Methods Twenty cases of patients who had both endorectal DWI and phase array DWI were randomly selected. The space resolution and the signal to noise ratio (SNR) of two types of diffusion weighted images were compared. The ADC values of prostate were recorded manually and by a third-party software to analyze the accuracy of the endorectal ADC value. Results The space resolution of the endorectal DWI was significantly higher than the phase array DWI without significant difference in SNR. The ADC value of a certain pixel was not different from phase array ADC value, when the distance from the pixel to the front surface of the endorectal coil was less than 22.9 mm.The two types ADC values of the peripheral zone had no statistical difference and were highly correlated with the correlation coefficient of 0.820. Conclusion The space resolution of the endorectal DWI was high but the ADC value was useable in a restricted region. |
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