两种脂肪抑制技术在肝脏T_2WI序列扫描中的比较  被引量:1

Comparison of two kinds of fat suppression techniques in T2-weighted-imaging sequence of liver

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作  者:刘晓蕾[1] 林帆[1] 邱喜雄[1] 李顶夫[1] 

机构地区:[1]深圳市第二人民医院放射科,广东518035

出  处:《齐齐哈尔医学院学报》2012年第16期2160-2161,共2页Journal of Qiqihar Medical University

摘  要:目的比较精准频率反转恢复(SPAIR)和频率选择饱和(FS)两种脂肪抑制技术的肝脏T2WI序列(结合BLADE和呼吸门控技术)的图像质量,探讨更适合该序列的抑脂技术。方法回顾性的分析25例正常肝脏T2WI-BLADE-Resp/Trigger抑脂序列的图像,每例均用SPAIR和FS两种脂肪抑制技术扫描,其它参数一致。测量并统计腹部皮下脂肪的均值M、变异系数CV、肝脏的信噪比SNR、肝脏与脾脏及肝脏与脑脊液的对比噪声比CNR1,CNR2。结果 SPAIR抑脂序列图像的腹部皮下脂肪均值M(30.58±8.05),变异系数CV(0.46±0.11)分别小于FS抑脂序列,其差异有统计学意义(P<0.05);肝脏的信噪比SNR(69.20±16.75)、肝脏与脾脏的对比噪声CNR1(81.60±17.86),肝脏与脑脊液的对比噪声比CNR2(181.90±39.80)分别高于FS抑脂序列,其差异有统计学意义(P<0.05)。结论 SPAIR抑脂序列图像的脂肪抑制程度、均匀性好,信噪比和对比噪声比高,是肝脏T2WI-BLADE-Resp/Trigger抑脂序列的首选抑脂技术。Objective To compare the imaging quality and adaptability between two kinds of fat suppression techniques, SPAIR (Spectral Attenuated Inversion Recovery) and FS(frequency selective presatuation) in T2- weighted- imaging of liver. Methods Retrospectively evaluated T2WI- BLADE--Resp/Trigger with both SPAIR and FS techniques in 25 normal liver eases. Measured and cal- culated the M (mean value) and CV (coefficient of variance) in abdominal subcutaneous fat, SNR (signal--to--noise ratio) in liver tissue, CNR(contrast--to--noise ratio) between liver and spleen/cere- brospinal fluid. Results The data showed M(30.58±8.05) and CV(0.46±0. 11) in SPAIR group were lower than those in FS group (P 〈 0.05), SNR (69.20±16.75)in liver tissue, CNR between liver and spleen (81.60± 17.86)/cerebrospinal fluid (181.90±39.80) (P〈 0.05). Conclusions The homogenei- ty and the degree of fat suppression with SPAIR is better than that with FS, could be the first choice in T2WI-- BLADE-- Resp/Trigger of liver.

关 键 词:脂肪抑制 SPAIR BLADE 

分 类 号:R445.2[医药卫生—影像医学与核医学]

 

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