Chinander M R, Giger M L, Martell J M, Favus M J
Department of Radiology, University of Chicago, Illinois 60637, USA.
Med Phys. 2000 Jan;27(1):75-85. doi: 10.1118/1.598858.
We are developing computerized methods for characterizing the bone texture pattern from digitized skeletal radiographs. For this method to be useful clinically, it must be able to distinguish between weak and strong bone under the range of exposure conditions potentially encountered in the clinical setting. In this study, we examined the effect of exposure conditions on Fourier-based texture features. Thirty-four femoral specimens from total hip arthroplasties were radiographed multiple times under different exposure conditions. The specimens underwent mechanical strength testing from which load to failure values were obtained. The performance of the texture features were investigated in the task of distinguishing between strong and weak bone as characterized by the load to failure values. The texture features showed no dependence upon focal spot size of the x-ray tube or magnification. The texture features did show a dependence with relative exposure, peak kilovoltage, and amount of scattering material.
我们正在开发用于从数字化骨骼X光片中表征骨纹理模式的计算机化方法。为使该方法在临床上有用，它必须能够在临床环境中可能遇到的曝光条件范围内区分弱骨和强骨。在本研究中，我们研究了曝光条件对基于傅里叶变换的纹理特征的影响。对34个全髋关节置换术的股骨标本在不同曝光条件下进行多次X光摄影。对标本进行机械强度测试，从而获得失效载荷值。研究了纹理特征在区分以失效载荷值表征的强骨和弱骨任务中的性能。纹理特征与X射线管的焦点尺寸或放大倍数无关。纹理特征确实与相对曝光、峰值千伏和散射材料量有关。
