Institute of Diagnostic and Interventional Neuroradiology.
AJNR Am J Neuroradiol. 2013 Nov-Dec;34(11):2177-83. doi: 10.3174/ajnr.A3589. Epub 2013 May 30.
Conventional platinum coils cause imaging artifacts that reduce imaging quality and therefore impair imaging interpretation on intraprocedural or noninvasive follow-up imaging. The purpose of this study was to evaluate imaging characteristics and artifact production of polymeric coils compared with standard platinum coils in vitro and in vivo.
Polymeric coils and standard platinum coils were evaluated in vitro with the use of 2 identical silicon aneurysm models coiled with a packing attenuation of 20% each. DSA, flat panel CT, CT, and MR imaging were performed. In vivo evaluation of imaging characteristics of polymeric coils was performed in experimentally created rabbit carotid bifurcation aneurysms. DSA, CT/CTA, and MR imaging were performed after endovascular treatment of the aneurysms. Images were evaluated regarding visibility of individual coils, coil mass, artifact production, and visibility of residual flow within the aneurysm.
Overall, in vitro and in vivo imaging showed relevantly reduced artifact production of polymeric coils in all imaging modalities compared with standard platinum coils. Image quality of CT and MR imaging was improved with the use of polymeric coils, which permitted enhanced depiction of individual coil loops and residual aneurysm lumen as well as the peri-aneurysmal area. Remarkably, CT images demonstrated considerably improved image quality with only minor artifacts compared with standard coils. On DSA, polymeric coils showed transparency and allowed visualization of superimposed vessel structures.
This initial experimental study showed improved imaging quality with the use of polymeric coils compared with standard platinum coils in all imaging modalities. This might be advantageous for improved intraprocedural imaging for the detection of complications and posttreatment noninvasive follow-up imaging.
传统的铂金线圈会产生成像伪影，降低成像质量，从而影响术中或非侵入性随访成像的解读。本研究的目的是评估聚合物线圈与标准铂金线圈在体外和体内的成像特性和产生伪影的情况。
使用 2 个相同的硅制动脉瘤模型，每个模型的填塞衰减率为 20%，对聚合物线圈和标准铂金线圈进行体外评估。进行了数字减影血管造影（DSA）、平板 CT、CT 和磁共振成像（MRI）检查。在实验性创建的兔颈动脉分叉动脉瘤中进行了聚合物线圈的体内成像特征评估。对动脉瘤进行血管内治疗后，进行了 DSA、CT/CTA 和 MRI 检查。对图像进行评估，包括单个线圈的可见度、线圈质量、伪影产生以及动脉瘤内残余血流的可见度。
总体而言，与标准铂金线圈相比，聚合物线圈在所有成像方式中都显著减少了成像伪影的产生。使用聚合物线圈改善了 CT 和 MRI 的图像质量，允许更好地显示单个线圈环和残余动脉瘤管腔以及动脉瘤周围区域。值得注意的是，与标准线圈相比，CT 图像显示出明显改善的图像质量，仅有轻微的伪影。在 DSA 上，聚合物线圈具有透明性，允许显示重叠的血管结构。
这项初步的实验研究表明，与标准铂金线圈相比，聚合物线圈在所有成像方式中都能提高成像质量。这对于提高术中成像的检测并发症和治疗后非侵入性随访成像的能力可能是有利的。
