Radiology:单期相还是多期相?CT血管造影在急性缺血性卒中患者中的应用

2021-06-11 shaosai MedSci原创

侧支循环状态是前循环闭塞导致的急性缺血性卒中(AIS)患者影像学和临床预后的重要预测因子。

 侧支循环状态是前循环闭塞导致的急性缺血性卒中(AIS)患者影像学和临床预后的重要预测因子。尽管数字减影血管造影检查被认为是评估侧支血流状态的标准检查手段,但由于该检查较为繁琐且时间较长,因此在急性情况下很难推广使用。

随着机械取栓术的发展,先进的影像学检查手段已被广泛用于基线评估。在许多脑卒中中心,CT灌注成像是评价脑血管疾病的常规手段。然而,CT灌注技术在采集、后处理和分析方面都十分复杂。同时该技术还高度依赖于不同的后处理方法和软件,并且极易受到运动伪影的影响。通过比较,CT血管造影所需时间更少,且通过适当的方法对图像进行获取和重建以得到侧支循环状态的信息。单期相CT血管造影在一次快速扫描中显示脑血管循环,该扫描成功与否取决于注射造影剂后采集时间点的抓取是否准确,过早或过晚都可能导致对侧支循环显示的不准确。在临床研究中,多期相CT血管造影已被常规用于病变的显示和患者的预后预测。与单期相CT血管造影相比,多期相CT血管造影可评估侧枝循环充盈的程度和速度。

虽然多期相CT血管造影在预测AIS患者的预后方面十分有价值,但其与CT灌注在这方面性能比较的相关研究十分有限。近日,发表在Radiology杂志的一项研究比较了使用单期相或多期相CT血管造影和CT灌注参数评估的侧支循环评分系统对AIS患者临床预后方面的预测能力,为临床选择最佳的检查手段提供了有价值的参考依据。

本项回顾性研究分析了2017年10月至2018年8月期间的发病24小时内的因孤立性前循环大动脉闭塞所致AIS患者的资料。间接评分采用Menon等人所描述的评分系统进行评估。研究了由随访的扩散加权成像或平扫CT扫描图像确定的单期相和多期相侧支循环积分、低灌注、缺血中心体积和最终梗死体积(FIV)之间的相关性。采用受试者工作特征曲线和多变量logistic回归分析来评估评分系统和CT灌注参数对良好临床结果的预测能力。

本研究共纳入119例患者(中位年龄75岁;四分位数范围,66-82岁;74名男性)。单期相和多期相Menon评分均与FIV呈中度负相关(r = -0.43, P < .001; r = -0.44, P < .001)。在预测90天改良Rankin量表评分方面,受试者工作特征曲线分析显示,多期相Menon评分优于单期相Menon评分(曲线下面积[AUC], 0.72 vs 0.64; P = .045)。多期相Menon评分与低灌注体积(AUC, 0.72 vs 0.72; P = .97)或缺血中心体积(AUC, 0.72 vs 0.71; P = .94)之间没有差异多变量分析显示,多期相Menon评分是临床预后良好的独立预测因子(优势比= 3.04,P = .001)。

图1 四种CT血管造影和CT灌注预测指标在预测良好临床预后方面的敏感性和特异性的受试者工作特征曲线。

表1 根据受者工作特征曲线估计选定特异性的敏感性。

本研究表明,在急性缺血性脑卒中患者中,用多期相CT血管造影在评估侧支循环状态方面比单期相CT血管造影更能准确地预测患者预后,且性能与CT灌注参数具有可比性。本研究为多期相CT血管造影在急性缺血性脑卒中患者中的广泛应用开辟了道路。

原文出处:

Zhi Wang,Jian Xie,Tian-Yu Tang,et al.Collateral Status at Single-Phase and Multiphase CT Angiography versus CT Perfusion for Outcome Prediction in Anterior Circulation Acute Ischemic Stroke.DOI:10.1148/radiol.2020192029

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    2021-06-14 亭儿789

    学习

    0

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    2021-06-13 sodoo
  7. [GetPortalCommentsPageByObjectIdResponse(id=1720393, encodeId=440f1e2039325, content=<a href='/topic/show?id=915c3604e6b' target=_blank style='color:#2F92EE;'>#卒中患者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=44, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=36047, encryptionId=915c3604e6b, topicName=卒中患者)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=940232842333, createdName=wangyang7969, createdTime=Sun Feb 27 06:34:20 CST 2022, time=2022-02-27, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=2010433, encodeId=82f0201043355, content=<a href='/topic/show?id=9cf7e9360d2' target=_blank style='color:#2F92EE;'>#缺血性卒中患者#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=43, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79360, encryptionId=9cf7e9360d2, topicName=缺血性卒中患者)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=a12645, createdName=智慧医人, createdTime=Sun Mar 20 15:34:20 CST 2022, time=2022-03-20, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1806445, encodeId=0350180644500, content=<a href='/topic/show?id=b649e9358fa' target=_blank style='color:#2F92EE;'>#缺血性卒#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=0, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79358, encryptionId=b649e9358fa, topicName=缺血性卒)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=636e2500187, createdName=12498da4m32(暂无昵称), createdTime=Mon Jul 12 04:34:20 CST 2021, time=2021-07-12, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1893395, encodeId=31b2189339593, content=<a href='/topic/show?id=c738e93521f' target=_blank style='color:#2F92EE;'>#缺血性#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=38, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=79352, encryptionId=c738e93521f, topicName=缺血性)], attachment=null, authenticateStatus=null, createdAvatar=, createdBy=66ec123, createdName=guihongzh, createdTime=Sat Sep 04 06:34:20 CST 2021, time=2021-09-04, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=973415, encodeId=dc949e3415aa, content=学习, beContent=null, objectType=article, channel=null, level=null, likeNumber=64, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=https://img.medsci.cn/20210611/f7616d040e6842afb334fb7dc7fe70d5/b02af0ca19f148e6988b157b7f6cd6e8.jpg, createdBy=b4eb5518910, createdName=亭儿789, createdTime=Mon Jun 14 11:01:31 CST 2021, time=2021-06-14, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1494174, encodeId=a27114941e4c5, content=<a href='/topic/show?id=3e34949e333' target=_blank style='color:#2F92EE;'>#造影#</a>, beContent=null, objectType=article, channel=null, level=null, likeNumber=29, replyNumber=0, topicName=null, topicId=null, topicList=[TopicDto(id=94973, encryptionId=3e34949e333, topicName=造影)], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=908d9134595, createdName=sodoo, createdTime=Sun Jun 13 13:34:20 CST 2021, time=2021-06-13, status=1, ipAttribution=), GetPortalCommentsPageByObjectIdResponse(id=1026882, encodeId=989710268829e, content=卒中虽然是临床上常见病,溶栓,取栓等血管内治疗也很成熟,但是仍然有很多未知问题有待认知!, beContent=null, objectType=article, channel=null, level=null, likeNumber=60, replyNumber=0, topicName=null, topicId=null, topicList=[], attachment=null, authenticateStatus=null, createdAvatar=null, createdBy=f0620, createdName=健健, createdTime=Sat Jun 12 01:34:20 CST 2021, time=2021-06-12, status=1, ipAttribution=)]
    2021-06-12 健健

    卒中虽然是临床上常见病,溶栓,取栓等血管内治疗也很成熟,但是仍然有很多未知问题有待认知!

    0

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