Filtered back projection revisited in low-kilovolt computed tomography angiography: sharp filter kernel enhances visualization of the artery of Adamkiewicz
Filtered back projection revisited in low-kilovolt computed tomography angiography: sharp filter kernel enhances visualization of the artery of Adamkiewicz
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DOI：
10.1007/s00234-018-2136-8
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发表时间：
2019-03-01
期刊：
影响因子：
2.8
通讯作者：
Fukuda, Tetsuya
中科院分区：
文献类型：
--
作者：
Nishii, Tatsuya;Kotoku, Akiyuki;Fukuda, Tetsuya
目的主动脉修补术前评估Adamkiewicz动脉的可靠性高度依赖于CT血管造影（CTA）显示该动脉与主动脉的连续性，主要是椎弓根周围。我们假设，由于其边缘增强和高空间分辨率，锐化滤波器内核可以改善血管结构连续性的可视化。本研究进行比较的主观和客观的图像质量重建与尖锐和平滑的过滤kernels.MethodsWe回顾性分析了40例连续患者谁经历了80千伏CTA检测动脉Adamkiewicz主动脉修复前的脊柱CTA。我们测量了脊髓前动脉到脊髓的CT值和对比噪声比。结果与平滑滤波核CTA相比，锐滤波核CTA显示脊髓动脉的CT值和对比噪声比明显增高（P
PurposeThe reliability of assessment of the artery of Adamkiewicz before the aortic repair is highly dependent on the display of the continuity of this artery with the aorta, mainly around the vertebral pedicle, by computed tomography angiography (CTA). We hypothesized that the sharp filter kernel can improve visualization of this continuity of the vessel structure because of its edge enhancement and high-spatial resolution. This study was performed to compare the subjective and objective image quality of spinal CTA reconstructed with sharp and smooth filter kernels.MethodsWe retrospectively reviewed 40 consecutive patients who had undergone 80-kV CTA to detect the artery of Adamkiewicz before aortic repair. We measured the CT number and the contrast-to-noise ratio of the anterior spinal artery to the spinal cord. Furthermore, the continuity of the artery of Adamkiewicz was evaluated using a 3-point scale (2 points, absolute; 0 points, undetectable).ResultsCTA with the sharp filter kernel showed a significantly higher CT number and contrast-to-noise ratio of the spinal artery than did CTA with the smooth filter kernel (P