Registration of Preoperative CTA and Intraoperative Fluoroscopic images for Assisting Aortic Stent Grafting
Registration of Preoperative CTA and Intraoperative Fluoroscopic images for Assisting Aortic Stent Grafting
复制标题
辅助主动脉支架移植术前 CTA 和术中透视图像的配准
DOI：
10.1007/3-540-45787-9_60
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发表时间：
2002
期刊：
影响因子：
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通讯作者：
Kanji Inoue
中科院分区：
文献类型：
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作者：
H. Imamura;N. Ida;N. Sugimoto;S. Eiho;S. Urayama;K. Ueno;Kanji Inoue
我们研究了术前3D-CTA图像与术中介入期间透视图像之间的配准方法。我们的最终目标是协助血管内支架移植治疗主动脉瘤。该方法通过对3D-CTA进行体素投影，在提取出一个主动脉区域后，生成数字重建的放射图。通过增加/降低DRR主动脉区域的CT值，获得有/无造影剂注射的情况。随后，我们通过改变成像参数迭代地计算DRR和透视图像之间的匹配度。选择与透视图像最相似的DRR。我们利用模拟的荧光图像研究了几种匹配方法的特点。根据仿真结果，我们在方法中使用了残差的M-估计。通过对临床数据的应用实例，验证了残差的M-估计量在配准中的成功应用。
We investigated a registration method between preoperative 3D-CTA and intraoperative fluoroscopic images during intervention. Our final goal is assisting endovascular stent grafting for aortic aneurysm. In our method, DRR (Digitally Reconstructed Radiograph) are generated by voxel projection of 3D-CTA after extracting an aorta region. By increasing/decreasing CT value in the aorta region of DRR with/without contrast media injection are obtained. Subsequently we calculate matching measures between DRR and fluoroscopic images iteratively by changing imaging parameters. The most similar DRR to fluoroscopic image is selected. We investigated characteristics of several matching measures using simulated fluoroscopic images. From simulation results, we use M-estimator of residual in our method. From an application example to clinical data, registration was successfully applied by M-estimator of residual.
动脉瘤主动脉的提取和定量分析用于辅助血管内支架移植
DOI：
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发表时间：
2004
期刊：
Systems and Computers in Japan 35
影响因子：
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作者：
H. Imamura;^*N. Sugimoto;s. Eiho. S. Urayama. K. Ueno;K. Inoue
通讯作者：
K. Inoue