可变反转角HASTE序列在腹部检查中的应用
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摘要
目的:评估可变反转角半傅里叶单次激发快速自旋回波(vfl HASTE)序列在腹部检查中的应用价值。方法:共选择需行腹部检查78例患者,并通过传统HASTE序列和vfl HASTE序列检查进行冠状位和轴位扫描。评估两个序列获得肝脏组织结构及肝内病灶图像的信噪比和对比信噪比。并由两名放射科医生评估两种图像的清晰度和伪影,进行分析处理。结果:所有检查均顺利完成,vfl HASTE序列图像相对于传统HASTE序列肝组织结构SNR、肝内病灶SNR和肝脾CNR,差异无统计学意义(P>0.05)。vfl HASTE序列图像锐利度更高伪影更少,对组织和病灶显示更清晰(P<0.05)。结论:vfl HASTE序列降低了传统HASTE序列的模糊伪影,软组织和病灶显示更清晰,在腹部检查中更有价值。
Objective To evaluate the application value of variable flip angle half-Fourier acquisition single-shot turbo spin-echo(vfl HASTE) sequence in abdominal examination. Methods A total of 78 patients who needed abdominal examination were enrolled in this study. The coronary and axial scans were performed on the patients by traditional HASTE sequence and vfl HASTE sequence. The signal-to-noise ratios and contrast-to-noise ratios of liver tissues and intrahepatic lesions which were obtained by two different kinds of sequences were evaluated. Moreover, the clarity and artifact of the two kinds of images were evaluated by two radiologists. Results All the examinations were successfully completed. There was no difference in the signal-to-noise ratio of liver tissues and intrahepatic lesions and the contrast-to-noise ratio of liver and spleen between images obtained with vfl HASTE sequence and those obtained with traditional HASTE sequence(P>0.05). However, compared with the images obtained with traditional HASTE sequence, those obtained with vfl HASTE sequence not only had higher sharpness, fewer artifacts, but also displayed tissues and lesions more clearly(P<0.05). Conclusion vfl HASTE sequence which reduces the fuzzy artifacts in the traditional HASTE sequence and displays soft tissues and lesions more clearly is more valuable in abdominal examination.
Objective To evaluate the application value of variable flip angle half-Fourier acquisition single-shot turbo spin-echo(vfl HASTE) sequence in abdominal examination. Methods A total of 78 patients who needed abdominal examination were enrolled in this study. The coronary and axial scans were performed on the patients by traditional HASTE sequence and vfl HASTE sequence. The signal-to-noise ratios and contrast-to-noise ratios of liver tissues and intrahepatic lesions which were obtained by two different kinds of sequences were evaluated. Moreover, the clarity and artifact of the two kinds of images were evaluated by two radiologists. Results All the examinations were successfully completed. There was no difference in the signal-to-noise ratio of liver tissues and intrahepatic lesions and the contrast-to-noise ratio of liver and spleen between images obtained with vfl HASTE sequence and those obtained with traditional HASTE sequence(P>0.05). However, compared with the images obtained with traditional HASTE sequence, those obtained with vfl HASTE sequence not only had higher sharpness, fewer artifacts, but also displayed tissues and lesions more clearly(P<0.05). Conclusion vfl HASTE sequence which reduces the fuzzy artifacts in the traditional HASTE sequence and displays soft tissues and lesions more clearly is more valuable in abdominal examination.
引文
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[15]LOENING A M,SARANATHAN M,RUANGWATTANAPAISARNN,et al.Increased speed and image quality in single-shot fast spin echo imaging via variable refocusing flip angles[J].J Magn Reson Imaging,2015,42(6):1747-1758.
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[2]孙勇,赵丹蕾,高剑波,等.1.5T MR快速扫描在腹部疾病穿刺活检中的临床应用[J].临床放射学杂志,2017,36(1):99-102.SUN Y,ZHAO D L,GAO J B,et al.The clinical application of percutaneous biopsy in abdominal diseases under a quick scan of 1.5TMR guidance[J].Journal of Clinical Radiology,2017,36(1):99-102.
[3]凌寿佳,叶伟,梁登成,等.DWI联合LAVA技术在肝脏占位病变中的临床应用研究[J].中国CT和MRI杂志,2013,11(1):53-55.LING S J,YE W,LIANG D C,et al.Study on clinical application of magnetic resonance diffusion-weighted imaging(DWI)combined with LAVA technology on the diagnosis of hepatic space occupying lesions[J].Chinese Journal of CT and MRI,2013,11(1):53-55.
[4]马腾.Haste序列在MRCP检查中的应用价值[J].当代临床医刊,2016,29(1):1911-1912.MA T.Application value of Haste sequence in MRCP examination[J].The Medical Journal of Industrial Enterprise,2016,29(1):1911-1912.
[5]韩邵军,徐贤,刘新球,等.HASTE序列在老年人腹部磁共振检查中的应用[J].西南国防医药,2014,24(8):851-853.HAN S J,XU X,LIU X Q,et al.Application of HASTE sequence to abdominal MRI in senile patients[J].Medical Journal of National Defending Forces in Southwest China,2014,24(8):851-853.
[6]邹超,郭文莎,钟耀祖,等.3T下基于PSIF的快速T2加权腹部成像方法[J].集成技术,2013,2(5):7-10.ZOU C,GUO W S,ZHONG Y Z,et al.Fast T2-weighted abdominal imaging at 3T based on PSIF sequence[J].Journal of Integration Technology,2013,2(5):7-10.
[7]刘新峰,王荣品,杨艳,等.MR半傅立叶单次激发快速自旋回波序列与超声检查在胎儿颅脑疾病的对比分析[J].磁共振成像,2015,6(7):501-505.LIU X F,WANG R P,YANG Y,et al.A comparative analysis of HASTE sequence of MRI examination with ultrasonic diagnosis in fetal brain abnormality[J].Chinese Journal of Magnetic Resonance Imaging,2015,6(7):501-505.
[8]MERKLE E M,DALE B M.Abdominal MRI at 3.0T:the basics revisited[J].Am J Radiol,2006,186(6):1524-1532.
[9]杜金超,肖智博,吕富荣,等.快速平衡稳态采集与单次激发快速自旋回波序列诊断正常胎儿胸腺的价值比较[J].中国医学影像技术,2017,33(10):1526-1530.DU J C,XIAO Z B,LüF R,et al.Diagnostic value of fast imaging employing steady state acquisition and single shot fast spin echo sequences in diagnosis of normal fetal thymuses:comparative study[J].Chinese Journal of Medical Imaging Technology,2017,33(10):1526-1530.
[10]张泽,孙峥,张开元,等.HASTE序列在静脉窦血栓患者视神经测量上的应用[J].医学影像学杂志,2017,27(7):1209-1212.ZHANG Z,SUN Z,ZHANG K Y,et al.HASTE measurement of the intraorbital optic nerve in cerebral venous thrombosis[J].Journal of Medical Imaging,2017,27(7):1209-1212.
[11]RUANGWATTANAPAISARN N,LOENING A M,SARANATHANM,et al.Faster pediatric 3-T abdominal magnetic resonance imaging:comparison between conventional and variable refocusing flip angle single-shot fast spin-echo sequences[J].Pediatr Radiol,2015,45(6):847-854.
[12]LITWILLER D V,HOLMES J H,SARANATHAN M,et al.Sensitivity of modulated refocusing flip angle single-shot fast spin echo to impulsive cardiac-like motion[C].Proceedings of the Twenty-Second Meeting of the International Society for Magnetic Resonance in Medicine.Berkeley,Calif:International Society for Magnetic Resonance in Medicine,2014:1613.
[13]MUGLER J P.Optimized three-dimensional fast-spin-echo MRI[J].J Magn Reson Imaging,2014,39(4):745-767.
[14]LOENING A M,LITWILLER D V,SARANATHAN M,et al.Increased speed and image quality for pelvic single-shot fast spin-echo imaging with variable refocusing flip angles and full-Fourier acquisition1[J].Radiology,2017,282(2):561-568.
[15]LOENING A M,SARANATHAN M,RUANGWATTANAPAISARNN,et al.Increased speed and image quality in single-shot fast spin echo imaging via variable refocusing flip angles[J].J Magn Reson Imaging,2015,42(6):1747-1758.
[16]BUSSE R F,BRAU A C,VU A,et al.Effects of refocusing flip angle modulation and view ordering in 3D fast spin echo[J].Magn Reson Med,2008,60(3):640-649.
[17]熊燕,孙家瑜,朱丹,等.磁共振胰胆管成像三维质子加权快速自旋回波序列和半傅立叶采集单次激发快速自旋回波序列对胆囊管显像的对比研究[J].华西医学,2013,28(10):1575-1578.XIONG Y,SUN J Y,ZHU D,et al.Comparison between sampling perfection with application optimized contrast technique MRcholangiopancreatography in the display of cystic duct[J].West China Medical Journal,2013,28(10):1575-1578.
[18]夏春潮,李真林,陈宪,等.TSE和HASTE序列在上腹部T2WI中的应用对比[J].放射学实践,2012,27(6):665-668.XIA C C,LI Z L,CHEN X,et al.Comparison of TSE and HASTET2WI sequences in upper abdomen study[J].Radiologic Practice,2012,27(6):665-668.