Contrast in intracardiac acoustic radiation force impulse images of radiofrequency ablation lesions.
Contrast in intracardiac acoustic radiation force impulse images of radiofrequency ablation lesions.
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DOI：
10.1177/0161734613519602
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发表时间：
2014-04
影响因子：
2.3
通讯作者：
Wolf PD
中科院分区：
文献类型：
--
作者：
Eyerly SA;Bahnson TD;Koontz JI;Bradway DP;Dumont DM;Trahey GE;Wolf PD
我们之前已经表明，心内声辐射力脉冲 (ARFI) 成像可显示射频消融 (RFA) 引起的组织硬度变化。这项体内研究的目的是（1）量化测量的 RFA 病变和未消融心肌中 ARFI 引起的位移，以及（2）计算二维 ARFI 和传统心内回声图像中的病变对比度 (C) 和对比度噪声比 (CNR)。在八只犬受试者中，使用 ARFI 成像电解剖标测系统来标测右心房消融病变部位，并指导在消融前后采集这些部位的 ARFI 图像。 ARFI 图像的读取器识别出具有高灵敏度 (90.2%) 和特异性 (94.3%) 的病变部位，并且平均测量的 ARFI 引起的位移在未消融部位 (11.23 ± 1.71 μm) 高于消融部位 (6.06 ± 0.94 μm)。 ARFI 图像的平均病变 C (0.29 ± 0.33) 和 CNR (1.83 ± 1.75) 显着高于空间配准的传统 B 模式图像 (C = -0.03 ± 0.28，CNR = 0.74 ± 0.68)。
We have previously shown that intracardiac acoustic radiation force impulse (ARFI) imaging visualizes tissue stiffness changes caused by radiofrequency ablation (RFA). The objectives of this in vivo study were to (1) quantify measured ARFI-induced displacements in RFA lesion and unablated myocardium and (2) calculate the lesion contrast (C) and contrast-to-noise ratio (CNR) in two-dimensional ARFI and conventional intracardiac echo images. In eight canine subjects, an ARFI imaging-electroanatomical mapping system was used to map right atrial ablation lesion sites and guide the acquisition of ARFI images at these sites before and after ablation. Readers of the ARFI images identified lesion sites with high sensitivity (90.2%) and specificity (94.3%) and the average measured ARFI-induced displacements were higher at unablated sites (11.23 ± 1.71 μm) than at ablated sites (6.06 ± 0.94 μm). The average lesion C (0.29 ± 0.33) and CNR (1.83 ± 1.75) were significantly higher for ARFI images than for spatially registered conventional B-mode images (C = −0.03 ± 0.28, CNR = 0.74 ± 0.68).
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DOI：
10.1109/tuffc.2009.1006
发表时间：
2009-01
期刊：
IEEE transactions on ultrasonics, ferroelectrics, and frequency control
影响因子：
--
作者：
Bouchard RR;Dahl JJ;Hsu SJ;Palmeri ML;Trahey GE
通讯作者：
Trahey GE
影响因子：
2.9
作者：
Nightingale, K;Palmeri, M;Trahey, G
通讯作者：
Trahey, G
DOI：
10.1109/tuffc.2007.345
发表时间：
2007-05-01
影响因子：
3.6
作者：
Hsu, Stephen J.;Fahey, Brian J.;Trahey, Gregg E.
通讯作者：
Trahey, Gregg E.
影响因子：
3.5
作者：
Fahey, B. J.;Hsu, S. J.;Trahey, G. E.
通讯作者：
Trahey, G. E.
影响因子：
5.5
作者：
Eyerly, Stephanie A.;Bahnson, Tristram D.;Koontz, Jason I.;Bradway, David P.;Dumont, Douglas M.;Trahey, Gregg E.;Wolf, Patrick D.
通讯作者：
Wolf, Patrick D.