Imaging characteristics of a high resolution cone beam collimator
Imaging characteristics of a high resolution cone beam collimator
复制标题
高分辨率锥形束准直器的成像特性
DOI：
10.1109/23.12804
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发表时间：
1988
影响因子：
1.8
通讯作者：
R. Coleman
中科院分区：
文献类型：
--
作者：
R. Jaszczak;K. Greer;C. Floyd;S. Manglos;R. Coleman
单光子发射计算机断层扫描（SPECT）使用锥束几何形状需要精确构建准直器和适当的重建算法。作者研究了一个铸造，高分辨率，锥束准直器的成像特性，并比较了其测量的灵敏度和分辨率与分析预测值。使用滤波反投影算法，他们在视场内的几个位置测量了点扩散函数。测量已经与平行的准直器表面的旋转轴（AOR），并与表面倾斜20度的角度相对于AOR。虽然SPECT点扩散响应不是完全平移不变的，但已经获得了脑模型的高质量锥形束图像。准直器的测量性能与解析推导的结果吻合良好。>
Single-photon-emission computed tomography (SPECT) using cone-beam geometry requires accurately built collimators and an appropriate reconstruction algorithm. The authors have investigated the imaging characteristics of a cast, high-resolution, cone-beam collimator and have compared its measured sensitivity and resolution with analytically predicted values. Using a filtered back-projection algorithm, they have measured point-spread functions at several locations within the field of view. Measurements have been made both with the collimator surface parallel to the axis-of-rotation (AOR) and with the surface tilted at an angle of 20 degrees with respect to the AOR. Although the SPECT point-spread response is not completely shift-invariant, high-quality cone-beam images of a brain phantom have been obtained. The measured performance of the collimator agrees well with analytically derived results. >
单光子发射计算机断层扫描的锥束准直：使用滤波反投影进行分析、模拟和图像重建。
影响因子：
3.8
作者：
Jaszczak,RJ;FloydJr,CE;Manglos,SH;Greer,KL;Coleman,RE
通讯作者：
Coleman,RE