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郑州大学第一附属医院:人工智能触发技术与传统团注追踪触发技术在下肢动脉CT血管成像中的对比研究

  • 2026-04-16 09:07:50
郑州大学第一附属医院:人工智能触发技术与传统团注追踪触发技术在下肢动脉CT血管成像中的对比研究

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作者信息

刘 杰

通信作者

郑州大学第一附属医院技师长,主任技师,硕士生导师,郑州大学第一临床医学院影像技术教研室主任。

社会兼职:中华医学会影像技术分会全国委员,中华医学会影像技术分会CT学组组长,中国医师协会医学技师分会全国委员,中国医药教育协会医学影像技术学专委会全国委员,中国医学装备协会放射装备委员会全国常务委员。

学术成果及荣誉:以第一作者及通讯作者发表论文二十余篇,其中包括European Radiology、Academic Radiology在内的SCI文章十余篇,担任多家杂志副主编,多次获取河南省科学技术进步奖一等奖。

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齐 珂

第一作者

郑州大学硕士研究生,以第一作者发表SCI文章3篇

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文章来源

  • 齐 珂,李舒梦,魏永康,陈 岩,原 典,张怡存,张梦圆,张炜珽,刘 杰*

  • 本文引用格式

    齐 珂,李舒梦,魏永康,等.人工智能触发技术与传统团注追踪触发技术在下肢动脉CT血管成像中的对比研究[J].临床放射学杂志,2025,44:1750-1756.

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摘要

  • 目的

    比较采用人工智能触发技术与传统团注追踪技术获得的下肢动脉CT血管成像(CTA)图像质量,评估人工智能触发技术优化下肢动脉CTA扫描触发时机的有效性。

  • 方法

    前瞻性搜集2023年12月至2024年4月行下肢动脉CTA检查的80例患者,随机分为两组:常规组采用传统团注追踪技术固定10 s触发后延迟,实验组采用人工智能触发技术提供的个体化触发后延迟时间。将下肢血管分为主髂动脉段、股腘动脉段、胫腓动脉段及足部血管段测量其CT值并计算信噪比(SNR)、对比噪声比(CNR)。两名医师使用Likert 5级评分法对两组图像进行盲法评估。分别对两侧血管进行测量和评估,较低的一侧用于统计分析。两组CT值的比较采用双向方差分析(ANOVA),两组之间以及每组中每个解剖位置的CT值差异的分析采用Sidak多重比较法。两组SNR、CNR的比较采用独立样本t检验,主观图像质量评分的比较采用Mann-Whitney检验。组内相关系数(ICC)用于分析两位医师主观图像质量评分之间的一致性。

  • 结果

    常规组触发后延迟时间为10 s,实验组个体化触发后延迟时间的范围为9.10~14.90 s,平均值为(12.18±1.56)s。实验组胫腓动脉段[(369.05±87.93)HU vs. (448.63±74.20)HU,P<0.001]及足部血管段[(275.85±82.11)HU vs. (383.43±68.35)HU,P<0.001]的CT值优于常规组,且从主髂动脉段到胫腓动脉段CT值稳定(差值为35.58 HU,P=0.198)。采用个体化触发后延迟时间获得的下肢动脉CTA图像的SNR(P均≤0.001)、CNR(P均≤0.001)和主观图像质量(4.19±0.93 vs. 4.82±0.32,P<0.001)均高于常规组。

  • 结论

    与传统团注追踪技术相比,基于人工智能触发技术的个体化触发后延迟能够有效地优化扫描触发时机、提高下肢血管强化均匀性、提升下肢动脉CTA的图像质量。

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关键词

人工智能   体层摄影术,X线计算机   下肢动脉CTA 图像质量   对比剂

下肢外周动脉阻塞性疾病(peripheral arterialocclusive disease,PAOD)是一种常见且易被忽视的动脉疾病。PAOD患者多伴有吸烟史、高血压或糖尿病等病史,易发生动脉粥样硬化,显著增加心脑血管事件的发生及死亡风险[1]。随着多层螺旋CT性能的不断提升,下肢动脉CT血管成像(CTA)作为一种可靠的无创性检查方法,具有极高的临床应用价值[2,3]

      为准确评估下肢动脉基本状况,图像采集与对比剂注射方案的精准匹配对于实现血管的充分、均匀强化至关重要。目前常用的触发方法为团注追踪技术,即监测层面血管CT值超过触发阈值后,经过固定的触发后延迟时间开始图像采集。该延迟时间是基于经验的人群平均值,然而心血管疾病及血流阻塞等个体差异因素可能显著延迟对比剂抵达远端动脉的时间,因此在设定触发后延迟时间时需充分考虑患者个体因素。既往的研究中,部分学者通过双感兴趣区(ROI)的两次小剂量测试来计算对比剂从主动脉到腘动脉的通过时间,以此确定该患者的延迟时间[4];另有研究如Shimizu等[5]将扫描范围中心层面的小剂量测试峰值时间作为实际检查时的对比剂持续注射时间,以实现图像采集与对比剂注射方案同步的优化。然而这类方法流程复杂,增加了检查时间与患者肾脏负担。

      为解决上述问题,推出了一种人工智能触发技术,通过整合对比剂注射参数与实时监测信号特征,自动推导出个体化触发后延迟时间[6]。本研究拟采用该技术,旨在探讨基于个体化触发后延迟时间优化下肢动脉CTA扫描触发时机,提升下肢动脉血管图像质量的有效性。

阅读全文:人工智能触发技术与传统团注追踪触发技术在下肢动脉CT血管成像中的对比研究.pdf

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  1. CONNECT:[ UseTime:0.000841s ] mysql:host=127.0.0.1;port=3306;dbname=i460;charset=utf8mb4
  2. SHOW FULL COLUMNS FROM `fenlei` [ RunTime:0.001616s ]
  3. SELECT * FROM `fenlei` WHERE `fid` = 0 [ RunTime:0.000650s ]
  4. SELECT * FROM `fenlei` WHERE `fid` = 63 [ RunTime:0.000632s ]
  5. SHOW FULL COLUMNS FROM `set` [ RunTime:0.001537s ]
  6. SELECT * FROM `set` [ RunTime:0.000603s ]
  7. SHOW FULL COLUMNS FROM `article` [ RunTime:0.001605s ]
  8. SELECT * FROM `article` WHERE `id` = 479705 LIMIT 1 [ RunTime:0.001692s ]
  9. UPDATE `article` SET `lasttime` = 1777527981 WHERE `id` = 479705 [ RunTime:0.019703s ]
  10. SELECT * FROM `fenlei` WHERE `id` = 64 LIMIT 1 [ RunTime:0.010031s ]
  11. SELECT * FROM `article` WHERE `id` < 479705 ORDER BY `id` DESC LIMIT 1 [ RunTime:0.009299s ]
  12. SELECT * FROM `article` WHERE `id` > 479705 ORDER BY `id` ASC LIMIT 1 [ RunTime:0.001160s ]
  13. SELECT * FROM `article` WHERE `id` < 479705 ORDER BY `id` DESC LIMIT 10 [ RunTime:0.004003s ]
  14. SELECT * FROM `article` WHERE `id` < 479705 ORDER BY `id` DESC LIMIT 10,10 [ RunTime:0.029800s ]
  15. SELECT * FROM `article` WHERE `id` < 479705 ORDER BY `id` DESC LIMIT 20,10 [ RunTime:0.008605s ]
0.251010s