PURPOSE To illustrate the potential of magnetic particle imaging (MPI) for stent lumen imaging in comparison with clinical computed tomography (CT) and magnetic resonance imaging (MRI). MATERIALS AND METHODS Imaging of eight tracer-filled, stented vessel phantoms and a tracer-filled, non-stented reference phantom for each diameter was performed on a preclinical MPI scanner: eight commercially available coronary stents of different dimensions (diameter: 3-4 mm; length: 11-38 mm) and materials (stainless steel, platinum-chromium) were implanted into silicone vessel phantoms. For comparison, all vessel phantoms were also visualized by MRI and CT. Two radiologists assessed the images regarding stent-induced artifacts using a 5-point grading scale. RESULTS The visualization of all stented vessel phantoms was achieved without stent-induced artifacts with MPI. In contrast, MRI and CT images revealed multiform stent-induced artifacts. CONCLUSION Given its clinical introduction, MPI has the potential to overcome the disadvantages of MRI and CT concerning the visualization of the stent lumen.

中文翻译：

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磁性粒子成像：幻影研究中无伪像的金属支架内腔成像。

目的说明与临床计算机断层扫描（CT）和磁共振成像（MRI）相比，磁粉成像（MPI）在支架内腔成像中的潜力。材料和方法在临床前MPI扫描仪上对每个直径的八个填充有示踪剂的带支架的血管模型和一个填充有示踪剂的非支架的参考模型进行成像：八种不同尺寸的市售冠状动脉支架（直径：3-4 mm ；长度：11-38 mm）和材料（不锈钢，铂-铬）被植入到硅胶血管模型中。为了进行比较，还通过MRI和CT可视化了所有血管模型。两位放射科医生使用5分等级量表评估了支架引起的伪影。结果使用MPI可以在没有支架引起的伪影的情况下实现所有支架血管模型的可视化。相反，MRI和CT图像显示了多种形式的支架引起的伪影。结论鉴于临床上的引入，MPI有可能克服MRI和CT在支架内腔可视化方面的缺点。