CAJ | 학술논문

目的：探讨正常肾脏在3.0TMR多b值DWI的特点及反映肾脏水分子弥散特征的最佳b值。方法选择在我院体检的60例健康志愿者作为研究对象。采用Discovery MR 7503.0T 超导型磁共振成像系统进行肾脏MRI常规扫描和DWI扫描，b值选取50、100、300、500、800、1000s/mm2，在后处理工作站测量肾脏皮质及髓质的ADC值。结果 b值=50、100、300、500、800、1000s/mm2时，正常成人肾脏皮质的ADC值(×10-3s/mm2)分别为4.39±1.13、3.81±0.63、2.81±0.38、2.43±0.24、2.18±0.20、1.96±0.15，髓质的ADC值(×10-3s/mm2)分别为3.94±1.05、3.34±0.64、2.57±0.35、2.25±0.22、2.04±0.21、1.88±0.13，各b值下肾脏皮质与髓质的ADC值之间均具有显著统计学差异(P<0.01)。结论3.0TMR多b值DWI在肾脏的应用具有独特的优越性，b值取800s/mm2为反映肾脏水分子弥散特征的最佳b值。
목적：탐토정상신장재3.0TMR다b치DWI적특점급반영신장수분자미산특정적최가b치。방법선택재아원체검적60례건강지원자작위연구대상。채용Discovery MR 7503.0T 초도형자공진성상계통진행신장MRI상규소묘화DWI소묘，b치선취50、100、300、500、800、1000s/mm2，재후처리공작참측량신장피질급수질적ADC치。결과 b치=50、100、300、500、800、1000s/mm2시，정상성인신장피질적ADC치(×10-3s/mm2)분별위4.39±1.13、3.81±0.63、2.81±0.38、2.43±0.24、2.18±0.20、1.96±0.15，수질적ADC치(×10-3s/mm2)분별위3.94±1.05、3.34±0.64、2.57±0.35、2.25±0.22、2.04±0.21、1.88±0.13，각b치하신장피질여수질적ADC치지간균구유현저통계학차이(P<0.01)。결론3.0TMR다b치DWI재신장적응용구유독특적우월성，b치취800s/mm2위반영신장수분자미산특정적최가b치。
Objective To explore the characteristics of 3.0T MR mulity b-value Diffusion-weighted Imaging of normal kidney and the best b-value for reflecting the character of renal diffusion. Methods Selection in our hospital check-up of 60 cases of healthy volunteers as the research object. Using Discovery MR 750 3.0T superconducting magnetic resonance imaging system on the kidney with routine and DWI scan. B value was selected as 50, 100, 300, 500, 800, 1000s/mm2, measureing renal cortex and medullary ADC values in the post-processing workstation. Results When the b values were 50, 100, 300, 500, 800, 1000s/mm2, The ADC values of the cortex were 4.39±1.13、3.81±0.63、2.81±0.38、2.43±0.24、2.18±0.20、1.96±0.15,The ADC values of the medulla were 3.94±1.05、3.34±0.64、2.57±0.35、2.25±0.22、2.04±0.21、1.88±0.13, The b value of renal cortex and medullary ADC values between a statistically significant difference (P<0.01). Conclusion 3.0T MR mulity b-value Diffusion-weighted Imaging has its unique superiority on kidney and the best b-value for reflecting the character of renal diffusion was 800s/mm2.