康泰山,林良杰,吴健,林建忠,徐丽娜.基于mDixon新型MR血管成像序列用于颈部动脉成像的可行性[J].中国医学影像技术,2023,39(4):592~596 |
基于mDixon新型MR血管成像序列用于颈部动脉成像的可行性 |
Feasibility of a novel MR angiography sequence based on mDixon for cervical artery imaging |
投稿时间:2022-11-22 修订日期:2023-01-27 |
DOI:10.13929/j.issn.1003-3289.2023.04.024 |
中文关键词: 颈动脉疾病 磁共振血管成像 水脂分离技术 压缩感知 |
英文关键词:carotid artery diseases magnetic resonance angiography mDixon technology compressed sensing |
基金项目:中国博士后科学基金会面上项目(2020M671947)。 |
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中文摘要: |
目的 基于将放射状k空间填充及压缩感知技术融合于mDixon技术开发一种新型MR血管成像(MRA)序列(3D mDixon-MRA),观察其用于颈部动脉成像的可行性。方法 前瞻性收集45例疑诊颈部动脉疾病患者,以3D时间飞跃法采集颈部动脉MRA(3D TOF-MRA)及3D mDixon-MRA,比较颈总动脉根部和中远段、椎动脉根部和中远段及颈内外动脉根部在2种图像中的信噪比(SNR)和对比度噪声比(CNR),以及2种图像质量主观评分的差异。结果 3D mDixon-MRA所示各动脉SNR均显著高于3D TOF-MRA(P均<0.01)。颈总动脉根部CNR在2种图像中的差异无统计学意义(P=0.13),其余动脉在3D mDixon-MRA中的CNR均显著高于3D TOF-MRA(P均<0.01)。颈总动脉根部、椎动脉根部及椎动脉中远段在3D mDixon-MRA中的主观评分均高于3D TOF-MRA(P均<0.05),其余动脉在2种图像中的主观评分差异均无统计学意义(P均>0.05)。结论 3D mDixon-MRA序列可用于颈部动脉成像,有利于提高图像质量、缩短扫描时间。 |
英文摘要: |
Objective To develop a novel MR angiography sequence (3D mDixon-MRA) based on integrating k-space radial sampling and compressed sensing technology into mDixon technique, and to explore its feasibility for application in cervical artery imaging. Methods Forty-five patients with suspected cervical artery diseases were prospectively enrolled, and 3D time-of-flight cervical artery MRA (3D TOF-MRA) and 3D mDixon-MRA were performed. Signal-to-noise ratio (SNR) and contrast-to-nosie ratio (CNR) of root and mid-distal of the common carotid artery, root and mid-distal of the vertebral artery, root of internal and external carotid arteries, as well as the subjective scores of imaging quality were compared between 2 kinds of images. Results SNR of each artery on 3D mDixon-MRA was significantly higher than that on 3D TOF-MRA (all P<0.01). No significant difference of CNR of common carotid artery root was found between 3D mDixon-MRA and 3D TOF-MRA (P=0.13), while CNR of the other arteries were significantly higher on 3D mDixon-MRA than those on 3D TOF-MRA (all P<0.01). The subjective scores of common carotid artery root, the root and mid-distal of vertebral artery on 3D mDixon-MRA were significantly higher than those on 3D TOF-MRA (all P<0.05), while no significant difference of subjective scores of the rest arteries was found between 2 kinds of images (all P>0.05). Conclusion 3D mDixon-MRA sequence could be used for cervical artery imaging, which could improve imaging quality and shorten scanning time. |
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