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|本期目录/Table of Contents|

连枷样二尖瓣口返流彩色多普勒血流的三维重建(PDF)

《心脏杂志》[ISSN:1009-7236/CN:61-1268/R]

期数:
1999年第1期
页码:
1-4,7
栏目:
论著
出版日期:
1999-01-01

文章信息/Info

Title:
Three-dimensional reconstruction of color Doppler regurgitant flows of a flail mitral valve: a model study
作者:
周晓东1　钱蕴秋1　朱 霆1　李 军1　Teien D2;  Shiota T2;  Sahn DJ2
1第四军医大学西京医院超声科　西安 710032　2美国俄勒冈卫生科技大学
Author(s):
Zhou Xiaodong1;  Qian yunqiu1;  Zhu Ting1; Li Jun1;  Teien D2;  Shiota T2;  Sahn DJ2
1Xijing Hospital, Fourth Military Medical University, Xi’an 710032　2Oregon Health Sciences Un iversity, Portland, Oregon, USA
关键词:
二尖瓣;  连枷　三维重建　超声心动描记术;  多普勒
Keywords:
mitral valve;  flail three-dimensional reconstruction　echocardiography; Doppler
分类号:
-
DOI:
-
文献标识码:
-
摘要:
本研究采用体外血流模型, 模拟连枷样二尖瓣(FMV)口返流,应用常规彩色多普勒血流显像(CDFI)的返流面积与射流和血流会聚区的三维(3D)超声重建及实际返流量进行对比研究, 评价更复杂的血流(脉冲血流通过FMV)状态3D重建的可行性和准确性。被驱动的血流通过一个模拟FMV口,返流口的截面积为0.24 cm2。仪器使用ATL,Interspec Apogee 800 彩色多普勒超声仪, 探头附着在一种机械臂上, 在TomTec 计算机控制下进行0°～180°的旋转扫描获得射流和血流会聚区3D重建的数据。同时磁带记录CDFI图像待后分析。结果显示:CDFI FMV 的返流面积与实际返流容积和最大返流量呈中等相关(r=0.69, SEE=2.2 cm2, P<0.05 和r=0.62,SEE= 2.5cm2, P < 0.05)。3D重建后的返流容积与实际返流容积和最大返流量相关良好(r=0.96, SEE=7.6ml,P< 0.05 和r=0.94,SEE=8.4ml, P<0.01)。血流会聚区3D重建与实际返流容积相关较好(r=0.89, SEE=0.22ml, P<0.01)。结论: 3D重建可减低CDFI的某些限制, 如增益、贴壁返流和混叠速度等, 特别是定量评价和计算返流口复杂形状血流的容积, 3D重建优于CDFI 的方法。
Abstract:
Objestive　The aim of the present study was to evaluate the use of measurements of color Doppler jet area, three-dimensional (3D) jet volume and 3D flow convergence region as methods for assessing the possiblity and accuracy of 3D reconstruction of a more complex flow situation: pulsat ive flow through a simulated flail mitral valve (FMV). Methods: Four different flows (10,20,40 and 60 ml/beat) were driven into a previously described flow model using a Harvard Pulsative Blood Pump model. The flow was driven through a disk simulating a flail orifice valve. The cross sectional area of the regurgitant orifice was 0.24 cm2. The flow convergence towards the orifice and the regu rgitant jet were imaged using an ATL/Interspec ultrasound system (Apogee RX 800). The 3D was acquired using a rotation scan strategy with the transducer mounted on a mechanical arm and rotated from 0。to 180。.Under control of a Tom Tec computer,two2-dimensional (2D) ultrasound images were recorded on 0.5 inch video tape simultaneously with the rotational acquisition. Results: The correlation between the maximal jet area and the regurgitant volume/beat, the maximal volumetric flow rate were moderate (r=0.69, SEE=2.2cm2, P<0.05; r=0.62, SEE=2.5 cm2, P< 0.05; r=0.71 respect ively). A close correlation was found between the 3D reconstruction of the maximal regurgitant jet volume and the maximal volumetric flow rate (r=0.96, SEE=7.6ml,P< 0.05). Similar results were found wwhen the jet volume was compared to the regurgitant volume/beat and the driving velocity (r=0.94, SSEE=8.4 ml, P<0.01). There was a significant correlation between the volume of the flow convergence and the regurgitant volume/beat, the maximal volumetric flow rate (r=0.89, SEE=0.22 ml,P<0.01).Conclusion: The result of the 3D reconstruction of regurgitant jet are superior to 2D maximal jet areas. However, 3D reconstruction flow event are encumbered with the limitation of 2D Colo rDoppler i-e,,gain settings. Central jets versus jets adjacent to walls and Nyquist limits. Measurement from a 3D reconstructed flow convergence region may be superior to measurement s from 2D Color Doppler recordings to calculate volume flow of a more complex flow situation.

参考文献/References

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［5］Shiota T, Jones M , Teien D, et al. Color Doppler regurgitant jet area for evaluating eccentric mmitral regurgitation: An animal study with quantified mitral regurgitation. J Am Coll Cardiol, 1994; 24 (3) : 813.

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备注/Memo

备注/Memo:
(收稿1998-09-16　修回1998-10-12)
更新日期/Last Update: 1999-01-01