A comparison of the texture of computed tomography and projection radiography images of vertebral trabecular bone using fractal signature and lacunarity
A comparison of the texture of computed tomography and projection radiography images of vertebral trabecular bone using fractal signature and lacunarity
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DOI：
10.1016/s1350-4533(01)00048-0
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发表时间：
2001-06-01
影响因子：
2.2
通讯作者：
Dougherty, G
中科院分区：
文献类型：
--
作者：
Dougherty, G
骨小梁的结构完整性是表征椎骨生物力学强度的重要因素，并且由骨网络的连接性和骨小梁形成模式决定。这些可以使用纹理测量来评估，例如来自高分辨率投影射线照片的分形签名和空隙度。使用腰椎的中央部分，我们比较了从高分辨率横向投影图像获得的结果与从常规临床CT扫描仪的空间配准的低分辨率图像获得的结果，以确定临床CT数据是否可以提供有用的结构信息。如果针对图像系统模糊校正CT图像的功率谱，则所得分形特征对于两种模态是相似的。尽管CT图像相对于投影图像是模糊的，从而减少了空隙度，但从空隙度图中获得的估计的小梁分离对于两种模式是相似的。这表明，这些纹理措施包含必要的信息，小梁微结构，这是目前即使在低分辨率CT图像。来自CT或MRI图像的这种定量纹理测量在监测骨强度和预测未来骨折风险方面是潜在有用的。(C)2001年妇女平等研究所。由爱思唯尔科技有限公司出版。保留所有权利。
The structural integrity of trabecular bone is an important factor characterizing the biomechanical strength of the vertebra, and is determined by the connectivity of the bone network and the trabeculation pattern. These can be assessed using texture measures such as the fractal signature, and lacunarity from a high resolution projection radiograph. Using central sections of lumbar vertebrae we compared the results obtained from high-resolution transverse projection images with those obtained from spatially registered low-resolution images from a conventional clinical CT scanner to determine whether clinical CT data can provide useful structural information. Provided the power spectra of the CT images are corrected for image system blurring, the resulting fractal signature is similar for both modalities. Although the CT images are blurred relative to the projection images, with a consequent reduction in lacunarity, the estimated trabecular separation obtained from the lacunarity plots is similar for both modalities. This suggests that these texture measures contain essential information on trabecular microarchitecture, which is present even in low resolution CT images. Such quantitative texture measurements from CT or MRI images are potentially useful in monitoring bone strength and predicting future fracture risk. (C) 2001 IPEM. Published by Elsevier Science Ltd. All rights reserved.