A Concept for Magnetic Resonance Visualization of Surgical Textile Implants
A Concept for Magnetic Resonance Visualization of Surgical Textile Implants
复制标题
外科纺织植入物磁共振可视化的概念
作者：
N. Krämer;H. Donker;J. Otto;M. Hodenius;J. Sénégas;I. Slabu;U. Klinge;M. Baumann;A. Müllen;B. Obolenski;R. Günther;G. Krombach
目的：建立一种利用磁共振成像（MRI）显示超顺磁性氧化铁（SPIO）的外科纺织品植入物（STI）的方法。因此，应用了具有共振水抑制（IRON）的正对比反转恢复，并在体外评价了其性能。材料与方法：制备了不同浓度SPIO与基底材料结合的STI。在临床1.5特斯拉扫描仪上进行成像，使用传统的平衡梯度回波序列（SSFP），T2* 加权序列和IRON成像。体外实验在琼脂糖体模中进行。在MR图像上，评估对比度噪声比和植入物的尺寸。结果：常规MRI显示SPIO负载STI为信号空洞。使用IRON，网格清楚地显示出高强度，抑制了共振背景信号，与其他非共振源有明显区别。使用IRON，约9 mg/g的浓度导致最佳正对比度和最高对比度噪声比。取决于B 0方向，相位编码方向和STI的SPIO负载，铁信号表现出一个特征性的模式和高估STI的大小高达4.6 mm。结论：SPIO的整合到基础材料结合铁是一种可行的方法，可视化STI与MRI。这种方法可以帮助及时识别与补片相关的问题并减少手术翻修的需要。
Purpose:To develop a method for visualizing surgical textile implant (STI) with superparamagnetic iron oxides (SPIO), using magnetic resonance imaging (MRI). Therefore, positive-contrast inversion-recovery with on-resonant water suppression (IRON) was applied and its properties were evaluated in vitro. Materials and Methods:STI with different concentrations of SPIO integrated into the base material were produced. Imaging was performed on a clinical 1.5 Tesla scanner, using conventional balanced gradient echo sequences (SSFP), T2*-weighted sequences, and IRON-imaging. In vitro experiments were conducted in an agarose phantom. On MR-images, contrast-to-noise-ratios, and the dimensions of the implant were assessed. Results:Conventional MRI exhibited SPIO-loaded STI as signal voids. Using IRON, the mesh was clearly exhibited hyperintensely with suppression of on-resonant background signals with a distinct differentiation to other sources of off-resonances. Concentrations of approximately 9 mg/g led to best positive contrast and highest contrast-to-noise-ratios using IRON. Depending on B0-orientation, phase encoding direction and the STI's SPIO-load, the IRON-signal showed a characteristic pattern and an overestimation of STI size up to 4.6 mm. Conclusion:The integration of SPIOs into the base material combined with IRON is a feasible approach to visualize STI with MRI. This method could help to identify mesh-related problems in time and to reduce the need for surgical revision.
使用磁化率加权回波时间编码进行细胞磁共振成像的正对比可视化。
影响因子：
2.5
作者：
Kim,YoungBeom;Bae,KiHyun;Yoo,Seung-Schik;Park,TaeGwan;Park,HyunWook
通讯作者：
Park,HyunWook