使用跟踪导管位置数据进行基于血管的 CTA 图像与空间解剖学配准:体内准确性的临床前评估。

IF 3.7 Q1 RADIOLOGY, NUCLEAR MEDICINE & MEDICAL IMAGING
Geir Arne Tangen, Petter Aadahl, Toril A N Hernes, Frode Manstad-Hulaas
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引用次数: 0

摘要

对血管内器械进行电磁追踪有可能大大减少对患者和工作人员的辐射照射。在这项研究中,我们评估了使用电磁追踪导丝将术前计算机断层扫描血管造影(CTA)图像注册到物理坐标的基于血管方法的体内准确性。从五头猪的术前 CTA 图像中提取了主动脉髂动脉的中心线。通过电磁追踪导丝获得血管内位置。迭代-闭合点算法将位置数据与术前图像中心线进行配准。为了评估登记的准确性,在透视引导下将一根导丝放置在肠系膜上动脉、左肾动脉和右肾动脉内。当导丝被拉入主动脉时,通过电磁跟踪获取位置数据。在应用配准后,将测得的位置与 CTA 图像中人工识别的相应动脉口进行比较。计算每个相应动脉口点之间的三维(3D)欧氏距离,并计算每次配准的均方根(RMS)。所有配准的三维均方根中位数为 4.82 毫米,四分位数范围为 3.53-6.14 毫米。根据血管解剖结构对 CTA 图像进行基于血管的配准是可行的,其准确性也是可以接受的,值得进一步进行临床测试。相关性声明:本研究表明,中心线算法可用于将术前 CTA 图像与血管解剖结构进行配准,有望进一步减少血管手术过程中的电离辐射暴露。关键点:术前图像可用于指导手术,而无需术中电离成像。术前成像可作为引导血管手术的唯一成像方式。无需使用外部靶标来对图像和空间解剖进行配准/匹配。可在临床前环境中实现可接受的导航精度。
本文章由计算机程序翻译,如有差异,请以英文原文为准。

Vessel-based CTA-image to spatial anatomy registration using tracked catheter position data: preclinical evaluation of in vivo accuracy.

Vessel-based CTA-image to spatial anatomy registration using tracked catheter position data: preclinical evaluation of in vivo accuracy.

Electromagnetic tracking of endovascular instruments has the potential to substantially decrease radiation exposure of patients and personnel. In this study, we evaluated the in vivo accuracy of a vessel-based method to register preoperative computed tomography angiography (CTA) images to physical coordinates using an electromagnetically tracked guidewire. Centerlines of the aortoiliac arteries were extracted from preoperative CTA acquired from five swine. Intravascular positions were obtained from an electromagnetically tracked guidewire. An iterative-closest-point algorithm registered the position data to the preoperative image centerlines. To evaluate the registration accuracy, a guidewire was placed inside the superior mesenteric, left and right renal arteries under fluoroscopic guidance. Position data was acquired with electromagnetic tracking as the guidewire was pulled into the aorta. The resulting measured positions were compared to the corresponding ostia manually identified in the CTA images after applying the registration. The three-dimensional (3D) Euclidean distances were calculated between each corresponding ostial point, and the root mean square (RMS) was calculated for each registration. The median 3D RMS for all registrations was 4.82 mm, with an interquartile range of 3.53-6.14 mm. A vessel-based registration of CTA images to vascular anatomy is possible with acceptable accuracy and encourages further clinical testing. RELEVANCE STATEMENT: This study shows that the centerline algorithm can be used to register preoperative CTA images to vascular anatomy, with the potential to further reduce ionizing radiation exposure during vascular procedures. KEY POINTS: Preoperative images can be used to guide the procedure without ionizing intraoperative imaging. Preoperative imaging can be the only imaging modality used for guidance of vascular procedures. No need to use external fiducial markers to register/match images and spatial anatomy. Acceptable accuracy can be achieved for navigation in a preclinical setting.

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来源期刊
European Radiology Experimental
European Radiology Experimental Medicine-Radiology, Nuclear Medicine and Imaging
CiteScore
6.70
自引率
2.60%
发文量
56
审稿时长
18 weeks
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