| 张煜堃,刘娜,曹家骏,苗延巍,宋清伟.基于敏感性编码及压缩感知技术优化颅脑MR三维相位对比静脉造影成像序列[J].中国医学影像技术,2023,39(6):915~919 |
| 基于敏感性编码及压缩感知技术优化颅脑MR三维相位对比静脉造影成像序列 |
| Optimization of MR sequences of craniocerebral three-dimensional phase-contrast magnetic resonance venogram based on sensitivitycoding and compressed sensing technology |
| 投稿时间：2023-01-02 修订日期：2023-02-16 |
| DOI：10.13929/j.issn.1003-3289.2023.06.026 |
| 中文关键词: 磁共振成像 质量控制 静脉造影术 敏感性编码技术 压缩感知 |
| 英文关键词:magnetic resonance imaging quality control phlebography sensitivity encoding compressed sensing |
| 基金项目:辽宁省教育厅科学研究经费项目（LJKZ0856）、横向课题基金项目（2021HZ006）。 |
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| 中文摘要: |
| 目的 对比以不同加速因子（acceleration factors，AF）敏感性编码（SENSE）与压缩感知（CS）及SENSE组合（CS-SENSE）技术所获颅脑三维相位对比MR静脉造影（3D PC-MRV）图像质量，以优化序列。方法 前瞻性对26名健康志愿者以AF分别为6和9的SENSE技术，以及AF分别为9、12、15及18的CS-SENSE技术采集颅脑3D PC-MRV，并依次记为MRVSENSE6、MRVSENSE9、MRVCS9、MRVCS12、MRVCS15和MRVCS18。比较上矢状窦（SSS）和左（L）、右（R）侧乙状窦（SiS）在各组3D PC-MRV软组织图中，以及SSS和左（L）、右（R）侧横窦（TRS）的信噪比（SNR）和对比度噪声比（CNR）在各组3D PC-MRV幅度图中的差异；对比整体图像质量及静脉窦和脑静脉结构可视化主观评分。结果 3D PC-MRV软组织图中，除CNRR-SiS外，MRVSENSE6的SNRSSS、CNRSSS、SNRR-SiS及SNRL-SiS均高于MRVSENSE9（P均<0.05），MRVCS9、MRVCS12及MRVCS15图像各参数均高于MRVSENSE9（P均<0.05）而与MRVSENSE6差异均无统计学意义（P均>0.05），MRVCS18的SNRR-SiS和SNRL-SiS均低于MRVSENSE6，CNRL-SiS高于MRVSENSE9，SNRSSS、SNRR-SiS及SNRL-SiS低于MRVCS9及MRVCS12，SNRR-SiS低于MRVCS15（P均<0.05），其余参数差异均无统计学意义（P均>0.05）；3D PC-MRV幅度图中，MRVSENSE6各参数均高于MRVSENSE9，MRVCS9及MRVCS12均高于MRVSENSE6，MRVCS9、MRVCS12、MRVCS15及MRVCS18均高于MRVSENSE9，MRVCS15及MRVCS18均低于MRVCS9，MRVCS18低于MRVCS12（P均<0.05），其余各参数差异均无统计学意义（P均>0.05）；对图像质量的主观评分结果与上述客观评价结果相似。结论 相比SENSE，基于CS-SENSE的3D PC-MRV可在更短时间内获得质量更优的颅脑静脉图像；AF取12为优化序列。 |
| 英文摘要: |
| Objective To compare image quality of craniocerebral three-dimensional phase-contrast MR venogram (3D PC-MRV) acquired using sensitivity encoding (SENSE) with different acceleration factors (AF) and compressed sensing (CS) combined with SENSE (CS-SENSE). Methods Craniocerebral 3D PC-MRV were prospectively acquired in 26 healthy volunteers, including SENSE with AF of 6 and 9, CS-SENSE with AF of 9, 12, 15 and 18, respectively, which were recorded as MRVSENSE6, MRVSENSE9, MRVCS9, MRVCS12, MRVCS15 and MRVCS18. Signal-to-noise ratio (SNR) and contrast-to-noise ratio (CNR) of the superior sagittal sinus (SSS), left (L) and right (R) sigmoid sinuses (SiS) on 3D PC-MRV soft tissue maps, so were those of SSS, left and right transverse sinuses (TRS) on amplitude maps. The objective evaluation results and subjective scores of overall imaging quality and visualization of venous sinuses and cerebral veins of 3D PC-MRV were also compared. Results On 3D PC-MRV soft tissue maps, SNRSSS, CNRSSS, SNRR-SiS and SNRL-SiS of MRVSENSE6 were higher than those of MRVSENSE9 (all P<0.05). Parameters of MRVCS9, MRVCS12 and MRVCS15, except for CNRR-SiS, were higher than those of MRVSENSE9 (all P<0.05), while no significant difference of MRVSENSE6 was found (all P>0.05). SNRR-SiS and SNRL-SiS of MRVCS18 were lower than those of MRVSENSE6, with CNRL-SiS higher than MRVSENSE9 and SNRSSS, SNRR-SiS as well as SNRL-SiS lower than MRVCS9 and MRVCS12, and SNRR-SiS was lower than MRVCS15 (all P<0.05). No significant difference of the other parameters was found (all P>0.05). For objective evaluation on 3D PC-MRV amplitude maps, parameters of MRVSENSE6 was higher than MRVSENSE9, MRVCS9 and MRVCS12 were higher than MRVSENSE6, MRVCS9, MRVCS12, MRVCS15 and MRVCS18 were higher than MRVSENSE9. MRVCS15 and MRVCS18 were lower than MRVCS9, MRVCS18 was lower than MRVCS12 (all P<0.05), while no significant difference of the other parameters was found (all P>0.05). The results of subjective and objective evaluation on 3D PC-MRV images were similar. Conclusion Compared with SENSE, better imaging quality of craniocerebral vein could be obtain using 3D PC-MRV based on CS-SENSE with shorter time, especially with AF of 12. |
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