中华生物医学工程杂志
中華生物醫學工程雜誌
중화생물의학공정잡지
CHINESE JOURNAL OF BIOMEDICAL ENGINEERING
2011年
1期
43-47
,共5页
詹松华%赵喜%谭文莉%杨烁慧%俞健力%龚志刚
詹鬆華%趙喜%譚文莉%楊爍慧%俞健力%龔誌剛
첨송화%조희%담문리%양삭혜%유건력%공지강
磁共振成像%小孔径正交相控阵线圈%表面线圈%大鼠%成像质量
磁共振成像%小孔徑正交相控陣線圈%錶麵線圈%大鼠%成像質量
자공진성상%소공경정교상공진선권%표면선권%대서%성상질량
Magnetic resonance imaging%Small aperture orthogonal phased-array coil%Surface coils%Rat%Image quality
目的 比较小孔径正交相控阵小动物实验线圈与C3表面线圈在大鼠头部磁共振成像(MRI)检查的成像质量.方法 将10只雄性SD大鼠分别应用2种线圈进行头部MRI检查.测量大脑皮层、小脑、脑干、肌肉及眼球内的房水等部位的信号强度及背景噪声值,计算信噪比(SNR);由2位放射科医生对图像质量进行评分,将测量数据进行统计分析.结果 所有图像均得到了大脑皮层、小脑、脑干、肌肉及眼球内的房水等部位的SNR值.两种线罔成像质量比较,大脑皮层T1WI横断位(SNRsense-body=41.3±23.5;SNR C3=10.3±0.5;t=-3.21)、T2WI矢状位(SNR sense-body=63.8±16.6;SNR C3=37.9±4.4:t=-4.00)以及T2WI冠状位(SNR sense.body=91.6±23.8;SNR C3=38.5±11.8;t=-5.69)图像SNR差异均有统计学意义(P＜0.01);且在小脑、脑干以及眼球房水测量的结果亦相仿;肌肉组织仅在T1WI横断位(SNR sense-body=39.9±21.1;SNR C3=8.3±1.7;t=-3.64)和T2WI冠状位(SNR sense-body=23.5±9.8:SNR C3=11.9±4.1;t=-3.10)的SNR差异有统计学意义(P＜0.01).采用小孔径正交相控阵线圈检查获得的图像中T2WI冠状面得分最高,而2种线圈检查获得的弥散加权成像(DWI)图像质量评分均最低.结论 在大鼠头部成像MRI检查中,小孔径正交相控阵小动物实验线圈的信噪比和图像质量优于现在经常应用的C3表面线圈.
目的 比較小孔徑正交相控陣小動物實驗線圈與C3錶麵線圈在大鼠頭部磁共振成像(MRI)檢查的成像質量.方法 將10隻雄性SD大鼠分彆應用2種線圈進行頭部MRI檢查.測量大腦皮層、小腦、腦榦、肌肉及眼毬內的房水等部位的信號彊度及揹景譟聲值,計算信譟比(SNR);由2位放射科醫生對圖像質量進行評分,將測量數據進行統計分析.結果 所有圖像均得到瞭大腦皮層、小腦、腦榦、肌肉及眼毬內的房水等部位的SNR值.兩種線罔成像質量比較,大腦皮層T1WI橫斷位(SNRsense-body=41.3±23.5;SNR C3=10.3±0.5;t=-3.21)、T2WI矢狀位(SNR sense-body=63.8±16.6;SNR C3=37.9±4.4:t=-4.00)以及T2WI冠狀位(SNR sense.body=91.6±23.8;SNR C3=38.5±11.8;t=-5.69)圖像SNR差異均有統計學意義(P＜0.01);且在小腦、腦榦以及眼毬房水測量的結果亦相倣;肌肉組織僅在T1WI橫斷位(SNR sense-body=39.9±21.1;SNR C3=8.3±1.7;t=-3.64)和T2WI冠狀位(SNR sense-body=23.5±9.8:SNR C3=11.9±4.1;t=-3.10)的SNR差異有統計學意義(P＜0.01).採用小孔徑正交相控陣線圈檢查穫得的圖像中T2WI冠狀麵得分最高,而2種線圈檢查穫得的瀰散加權成像(DWI)圖像質量評分均最低.結論 在大鼠頭部成像MRI檢查中,小孔徑正交相控陣小動物實驗線圈的信譟比和圖像質量優于現在經常應用的C3錶麵線圈.
목적 비교소공경정교상공진소동물실험선권여C3표면선권재대서두부자공진성상(MRI)검사적성상질량.방법 장10지웅성SD대서분별응용2충선권진행두부MRI검사.측량대뇌피층、소뇌、뇌간、기육급안구내적방수등부위적신호강도급배경조성치,계산신조비(SNR);유2위방사과의생대도상질량진행평분,장측량수거진행통계분석.결과 소유도상균득도료대뇌피층、소뇌、뇌간、기육급안구내적방수등부위적SNR치.량충선망성상질량비교,대뇌피층T1WI횡단위(SNRsense-body=41.3±23.5;SNR C3=10.3±0.5;t=-3.21)、T2WI시상위(SNR sense-body=63.8±16.6;SNR C3=37.9±4.4:t=-4.00)이급T2WI관상위(SNR sense.body=91.6±23.8;SNR C3=38.5±11.8;t=-5.69)도상SNR차이균유통계학의의(P＜0.01);차재소뇌、뇌간이급안구방수측량적결과역상방;기육조직부재T1WI횡단위(SNR sense-body=39.9±21.1;SNR C3=8.3±1.7;t=-3.64)화T2WI관상위(SNR sense-body=23.5±9.8:SNR C3=11.9±4.1;t=-3.10)적SNR차이유통계학의의(P＜0.01).채용소공경정교상공진선권검사획득적도상중T2WI관상면득분최고,이2충선권검사획득적미산가권성상(DWI)도상질량평분균최저.결론 재대서두부성상MRI검사중,소공경정교상공진소동물실험선권적신조비화도상질량우우현재경상응용적C3표면선권.
Objective To compare the rat head MRI image quality of small aperture orthogonal phased-array creatural experimental coil and the C3 surface coil.Methods Ten male SD rats underwent both coils for head MRI.The signal intensities and background noise values of the cerebral cortex,cerebellum, brain stem, muscle and aqueous humor in eye were measured, and signal to noise ratio (SNR)was calculated.Image quality scores were obtained from 2 radiologists, t test was performed for statistical differences.Results SNR values over the cerebral cortex, cerebellum, brain stem, muscle and aqueous humor in eye were obtained from the images of all protocols.Statistically significant differences of the two coils were achieved in the cerebral cortex in the transverse T1WI (SNR sense-body=41.3±23.5; SNR C3=10.3±0.5; t=-3.21), sagittal T2WI (SNR sense-body=63.8±16.6; SNR C3=37.9±4.4; (=-4.00) and coronal T2WI (SNR sense-body=91.6±23.8, SNR C3=38.5±11.8; t=-5.69)(P＜0.01), so were in cerebellum, brain stem and aqueous humor in eye.Statistical differences of muscular tissue were observed merely in the transverse axial TiWI (SNR sense-body=39.9±21.1; SNR C3=8.3±1.7; t=-3.64) and the coronal T2WI (SNR sense-body=23.5±9.8; SNR C3=1 1.9±4.1; t=-3.10)(P＜0.01).Coronal T2WI score achieved the top in the small aperture orthogonal phased array coil, and the image qualities of diffusion-weighted imaging(DWI)in both two coils were low.Conclusion In head MRI of rats, the SNR value and head image quality of small aperture orthogonal phased-array coil is superior to that of the frequently used C3 surface coil.
