高分辨率压缩感知TOF-MRA技术对豆纹动脉成像的研究
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南京医科大学第一附属医院影像科

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国家自然科学基金面上项目(编号82171928)


Clinical evaluation of high-resolution compressed sensing Time-of-Flight MR angiography for lenticulostriate arteries
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    摘要:

    目的:探讨高分辨率压缩感知(compressed sensing, CS)TOF-MRA技术对脑豆纹动脉(lenticulostriate arteries, LSA)的显示价值,并比较不同加速因子对成像的影响。方法:选取23位健康志愿者,每位受试者采集四种不同加速因子系数(2、3、5、7)的CS TOF-MRA图像,分别记为CS2、CS3、CS5、CS7。定性评估四组图像的LSA显示质量,定量分析各组图像的LSA总条数、最长LSA长度及血管边缘锐利度。采用Friedman检验及随机区组方差分析进行统计学分析,并进行组间两两比较。结果:基于CS2、CS3、CS5、CS7的图像采集时间分别为6min3s、4min8s、2min35s、2min3s。LSA显示质量评分CS2、CS3明显优于CS5、CS7(P<0.05)。LSA显示条数CS2均明显优于其他三组(P均<0.05),而CS3和CS5之间,CS5和CS7之间无明显统计学差异。LSA显示长度CS2(3.47±0.29 cm)> CS3(3.22±0.29 cm)> CS5(3.00±0.33)> CS7 (2.69±0.32),两两比较均具有统计学差异(P均<0.05)。血管边缘锐利度CS2优于其他加速因子,CS3优于CS5、CS7,差异均具有统计学意义(P均<0.05),而CS5、CS7之间无明显统计学差异。结论:基于两倍加速因子的高分辨率CS TOF-MRA在临床合理的扫描时间内,可以提供较好的豆纹动脉图像,该技术为临床采用3.0 T磁共振显示及研究豆纹动脉相关性疾病提供了潜在的新方法。

    Abstract:

    [Abstract] Objective: To investigate the application of high-resolution compressed sensing (CS) Time-of-Flight MR angiography (CS TOF-MRA) for lenticulostriate arteries (LSA), and to compare different acceleration factors. Methods: Twenty-three healthy volunteers were selected and CS TOF-MRA images were acquired for each subject with four different acceleration factors (CS 2, 3, 5, 7), which were recorded as CS2, CS3, CS5, CS7, respectively. Image quality was graded by qualitative analysis. The total number, maximum length, and the edge sharpness of LSAs were quantitative analyzed and compared by Friedman test and variance analysis, followed by post-hoc test. Results: The acquisition time of CS2, CS3, CS5 and CS7 were 6min3s, 4min8s, 2min35s and 2min3s, respectively. The image quality of CS2 and CS3 were significantly better than CS5 and CS7 (all P<0.05). CS2 was significantly superior to the other three groups for displaying the total number of LSA (all P<0.05), while there was no significant difference between CS3 and CS5, CS5 and CS7. The maximum length of LSA on CS2 was 3.47±0.29 cm, which was longer than CS3 (3.22±0.29 cm), CS5 (3.00±0.33), and CS7 (2.69±0.32) (all P<0.05). For the edge sharpness of LSA, CS2 was significantly better than CS3, CS5 and CS7, while CS3 was better than CS5 and CS7 (all P<0.05). There was no significant difference between CS5 and CS7. Conclusions: High-resolution CS TOF-MRA with an acceleration factor 2 can provide good image quality of LSA within a reasonable time. This technology may provide a new method for displaying LSA and investigation the small vascular disease by using clinical 3.0T MR.

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  • 收稿日期:2023-05-16
  • 最后修改日期:2023-06-09
  • 录用日期:2023-08-29
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