Institute of Diagnostic and Interventional Radiology and Neuroradiology, University Hospital Essen, Essen, Germany.
Eur Radiol. 2011 Oct;21(10):2193-201. doi: 10.1007/s00330-011-2147-x. Epub 2011 May 10.
Comparison of image quality in DE-CTA with and without automatic head bone removal (BR) versus CTA with 16-detectors as a tool in postoperative evaluation of patients after neurosurgical clipping.
In this study 30 aneurysms that had undergone neurosurgical clipping were included: 18 with DE-CTA and 12 with conventional CTA. The images were further processed using the volume rendering technique (VRT) and BR. Two experienced neuroradiologists reviewed the images regarding the severity of artefacts surrounding the clip, visibility of the vessels and remnant necks. The results were compared with DSA images, if performed.
Significantly fewer disturbances by artefacts were observed in DE-CTA versus CTA in a 16-row system. Visibility of the surrounding vessels was satisfying in both techniques and there were comparable results with DSA with only one exception. All images produced with 140 kV provided fewer artefacts than those with 80 kV.
DE-CTA provides better image quality with fewer disturbances by clip artefact, a satisfying evaluation of remnant aneurysm necks and the surrounding vessels. As this method is easily performed and readily accessible with fast image post-processing using BR it provides an opportunity to avoid invasive DSA in the evaluation of suspected aneurysm rests.
比较去骨（BR）前后的双能 CT 血管造影（DE-CTA）与 16 排 CT 血管造影（CTA）在神经外科夹闭术后患者术后评估中的图像质量，以评估其作为工具的价值。
本研究纳入了 30 个接受过神经外科夹闭术的动脉瘤：18 个采用 DE-CTA，12 个采用常规 CTA。进一步使用容积再现技术（VRT）和 BR 对图像进行后处理。两位有经验的神经放射科医生根据夹周围的伪影严重程度、血管的可见性和残余颈部评估图像。如果进行了数字减影血管造影（DSA），则将结果与 DSA 进行比较。
在 16 排系统中，与 CTA 相比，DE-CTA 观察到的伪影干扰明显减少。两种技术均能满意显示周围血管，且与 DSA 仅有一个例外结果可比。所有 140 kV 产生的图像产生的伪影少于 80 kV。
DE-CTA 提供了更好的图像质量，夹伪影干扰较少，对残余动脉瘤颈部和周围血管的评估令人满意。由于这种方法易于进行，并且使用 BR 进行快速图像后处理即可获得，因此为避免在可疑动脉瘤残留的评估中进行有创性 DSA 提供了机会。
