CAJ | 학술논문

目的：探讨MR超清小视野扩散加权成像（reduced field of view，r-FOV DWI）应用于肾上腺中的可行性及价值。方法收集19例健康志愿者（男：女为14：5），所有被检者于3.0 T MRI扫描仪行r-FOV DWI（19例）及常规全视野扩散加权成像（f-FOV DWI，9例）（b=0，800 s/mm2）扫描。由1名放射学诊断医师于r-FOV DWI图像采用多次测量取平均值的方法测量双侧肾上腺各部位厚度，并选取肾上腺各部位最大层面分别测量r-FOV及f-FOV DWI表观扩散系数（ADC值），由2名影像诊断医师利用4分法对图像中肾上腺显示效果进行主观评分。利用SPSS 17.0软件对数据进行统计学分析。结果 r-FOV DWI对左、右侧肾上腺各部位显示主观评分高于f-FOV DWI，差异具有统计学意（P<0.05），r-FOV DWI各部位ADC值均小于f-FOV DWI，差异具有统计学意义（P<0.05），左、右侧肾上腺各部位ADC值及各部位厚度之间差异无明显统计学意义（P>0.05）。2名影像诊断医师对图像主观评分具有显著一致性。结论 r-FOV DWI可清晰显示肾上腺形态及信号，提供更高空间分辨率扩散加权图像，为肾上腺疾病的准确诊断提供帮助。
목적：탐토MR초청소시야확산가권성상（reduced field of view，r-FOV DWI）응용우신상선중적가행성급개치。방법수집19례건강지원자（남：녀위14：5），소유피검자우3.0 T MRI소묘의행r-FOV DWI（19례）급상규전시야확산가권성상（f-FOV DWI，9례）（b=0，800 s/mm2）소묘。유1명방사학진단의사우r-FOV DWI도상채용다차측량취평균치적방법측량쌍측신상선각부위후도，병선취신상선각부위최대층면분별측량r-FOV급f-FOV DWI표관확산계수（ADC치），유2명영상진단의사이용4분법대도상중신상선현시효과진행주관평분。이용SPSS 17.0연건대수거진행통계학분석。결과 r-FOV DWI대좌、우측신상선각부위현시주관평분고우f-FOV DWI，차이구유통계학의（P<0.05），r-FOV DWI각부위ADC치균소우f-FOV DWI，차이구유통계학의의（P<0.05），좌、우측신상선각부위ADC치급각부위후도지간차이무명현통계학의의（P>0.05）。2명영상진단의사대도상주관평분구유현저일치성。결론 r-FOV DWI가청석현시신상선형태급신호，제공경고공간분변솔확산가권도상，위신상선질병적준학진단제공방조。
Objective To investigate the efficacy of high-resolution reduced field-of-view(r-FOV)diffusion-weighted magnetic resonance imaging(DWI)of the adrenal gland.Methods 19 consecutive healthy volunteers underwent 3 T MRI including r-FOV DWI(19)and conventional full field-of-view(f-FOV)DWI(9).Image quality including the morphology and signal intensities of the adrenal glands was evaluated qualitatively by two abdominal imaging radiologists with four point scale.Apparent diffusion coefficient (ADC)values of bilateral adrenal glands as well as thickness of the glands were measured on r-FOV DWI by one radiologist.The data were analyzed using the SPSS 17.0 statistical software.Results The image quality of r-FOV DWI was significantly higher than f-FOV DWI(P<0.05)with high inter-observer agreement whereas the ADC values of r-FOV DWI were significantly lower than f-FOV DWI. There was no significant difference in ADC values and thickness between the left and right adrenal glands.Conclusion r-FOV DWI can clearly show the shape and signal intensities of the adrenal gland with higher spatial resolution and may possibly allow more accurate diagnosis of adrenal disease.