| 林天烨,冯逢,孙应实.流入饱和技术对多标记后延迟动脉自旋标记图像动脉“流入伪影”的影响[J].中国医学影像技术,2021,37(10):1548~1551 |
| 流入饱和技术对多标记后延迟动脉自旋标记图像动脉“流入伪影”的影响 |
| Impact of inflow saturation technique on “intravascualr artifacts” of multi-post label delay arterial spin labeling |
| 投稿时间：2021-03-11 修订日期：2021-07-30 |
| DOI：10.13929/j.issn.1003-3289.2021.10.027 |
| 中文关键词: 动脉通过伪影 动脉自旋标记 磁共振成像 |
| 英文关键词:arterial transit artifact arterial spin labeling magnetic resonance imaging |
| 基金项目:国家自然科学基金（82071899）、北京市自然科学基金（L182067）。 |
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| 中文摘要: |
| 目的 评价流入饱和技术对多标记后延迟动脉自旋标记（multi-PLD ASL）图像中动脉内"流入伪影"的影响。方法 针对8名健康志愿者分别行使用/不使用流入饱和技术顺序采集（SASL）及Hadamard编码采集（HASL），观察并比较SASL/HASL图像中出现动脉内异常信号的频率及其特点。结果 不使用流入饱和HASL中，70.00%（28/40）灌注图像动脉内可见异常信号，包括高信号和低信号，常见于血管走行区域；使用流入饱和技术后，仅5.00%（2/40）灌注图像中动脉内出现异常信号，差异有统计学意义（P<0.05）。不使用流入饱和的SASL图像中，75.00%（30/40）动脉内可见异常信号；使用流入饱技术后，仅7.50%（3/40）动脉内出现异常信号，差异有统计学意义（P<0.05）。使用流入饱和的HASL（5.00%）与SASL（7.50%）动脉内出现异常信号的频率差异无统计学意义（P>0.05）。结论 流入饱和技术可减轻或消除单次激发multi-PLD ASL中的动脉"流入伪影"。 |
| 英文摘要: |
| Objective To observe the impact of inflow saturation technique on "intravascualr artifacts" in multi-post label delay arterial spin labeling (multi-PLD ASL). Methods Eight healthy volunteers were enrolled. Sequential ASL (SASL) and Hadamard-encoded ASL (HASL) were acquired with/without inflow saturation technique. The frequency and characteristics of abnormal intra-arterial signals of SASL/HASL images with/without using inflow saturation were observed and compared. Results Among HASL without inflow satiation, 70.00% (28/40) of perfusion images showed abnormal intra-arterial signals, including high signals and low signals most in the vascular running area, while using inflow saturation technology, only 5.00% (2/40) of HASL perfusion images showed abnormal intra-arterial signals, and there were significant differences of the frequencies of abnormal intra-arterial signals (P<0.05). Among SASL without inflow saturation, 75.00% (30/40) had abnormal intra-arterial signals, while among SASL with inflow saturation, only 7.50% (3/40) had abnormal intra-arterial signals, and there were significant differences of the frequencies of abnormal intra-arterial signals (P<0.05). Nevertheless, no significant difference of the frequency of abnormal intra-arterial signals was found between HASL (5.00%) and SASL (7.50%) with inflow saturation (P>0.05). Conclusion Inflow saturation technique could reduce or eliminate "intravascualr artifacts" of single-shot multi-PLD ASL. |
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