快速智能磁共振技术在颈椎磁共振扫描中的应用价值  

Application value of intelligent quick magnetic resonance technique in magnetic resonance scanning of cervical vertebra

作　　者：徐敏 吴瑜[1,2] 刘键 王荣品 徐睿[2] 曾宪春[2] XU Min;WU Yu;LIU Jian;WANG Rongpin;XU Rui;ZENG Xianchun(Department of Graduate School,Zunyi Medical University,Zunyi 563000,China;Department of Medical Imaging,Guizhou Provincial People's Hospital,Guiyang 550002,China)

机构地区：[1]遵义医科大学研究生院,遵义563000 [2]贵州省人民医院医学影像科,贵阳550002

出　　处：《磁共振成像》2023年第10期111-115,共5页Chinese Journal of Magnetic Resonance Imaging

基　　金：国家自然科学基金项目(编号:82060314);贵州省自然科学基金项目(编号:黔科合基础-ZK[2022]一般263)。

摘　　要：目的 探讨快速智能磁共振(intelligent quick magnetic resonance,IQMR)技术在颈椎MRI中的临床应用价值。材料与方法 本研究回顾性分析临床疑颈椎病变患者临床资料50例,纳入颈椎T2WI常规图像、IQMR原始图像及IQMR重建图像。采用ANOVA检验比较三组图像的客观评分[感兴趣区域信号强度(signal strength,SI)、平均背景噪声(standard deviation,SD)、信噪比(signal-to-noise ratio,SNR)、对比噪声比(contrast-to-noise ratio,CNR)]之间的差异,采用多样本秩和(Kruskal-Wallis H)检验评价主观评分之间的差异性,并比较三组图像的病灶检出情况与扫描时间。结果 IQMR颈椎矢状位T2WI序列扫描平均时间约1 min 17 s,与常规MRI相比时间缩短约57%;与原始图像相比,经过IQMR重建所得图像的SD背景下降21%,SNR提升28%,CNR提升30%;与常规图像相比,经过IQMR重建所得图像SD下降43%,SNR提升50%、CNR提升68%;三组图像之间SI脊髓差异无统计学意义;三组图像之间SI脑脊液差异具有统计学意义(P<0.05),且常规图像SI脑脊液低于IQMR原始图像及IQMR重建图像。结 论IQMR技术在颈椎MRI中能降低SD、提高SNR及CNR,从而提高图像质量,因此IQMR技术能够在保证图像质量的情况下,缩短扫描时间、提高颈椎MRI的扫描效率。Objective:To explore the clinical value of fast intelligent quick magnetic resonance(IQMR)in cervical MRI.Materials and Methods:In this study,50 patients with suspected cervical spondylosis were collected retrospectively and included in T2-weighted(T2WI)conventional,IQMR original,and IQMR reconstructed images.ANOVA test was used to compare the differences among the objective scores of the three groups of images signal strength(SI),average background standard deviation(SD),signal-to-noise ratio(SNR),and contrast-to-noise ratio(CNR).Multiple rank sum(Kruskal-Wallis H)test was used to evaluate the subjective scores.The focus detection and scanning time differences among the three groups were compared.Results:The average scanning time of IQMR sagittal T2WI sequence was about 1 min 17 s,about 57%shorter than conventional scanning.Compared with the original image,the SDbackground of the image reconstructed by IQMR decreased by 21%,and CNR increased by 28%.Compared with the conventional image,the SD of the image reconstructed by IQMR decreased by 43%,and the CNR increased by 68%.There was no statistical difference in SIspinal cord among the three groups of images.There were significant differences in cerebrospinal fluid signals among the three groups.The cerebrospinal fluid signals of conventional images were lower than those of IQMR original images and IQMR reconstruction images.Conclusions:IQMR technology can reduce noise,and improve SNR and CNR in cervical MRI,thus improving image quality.In the case of ensuring image quality,it has the potential to reduce scanning time and improve the efficiency of clinical MR cervical spine scanning.

关 键 词：颈椎 信噪比 对比噪声比 快速智能磁共振技术 磁共振成像 

分 类 号：R445.2[医药卫生—影像医学与核医学] R681.55[医药卫生—诊断学]