目的：图像叠加融合法，研究桡骨头骨折块的面积、位置等特点。并对三联佂骨折患者的桡骨头骨折形态进行总结、描述。 材料和方法：采集23例桡骨头骨折患者肘关节CT数据（肘关节三联佂12例，非三联佂11例）。对桡骨头骨折块进行重建并虚拟复位。测量桡骨头骨折块中心点坐标，并绘制骨块中心分布图。 结果：23例桡骨头骨折，共计产生43块骨折块，平均为1.9 (±0.7)块。三联佂损伤者，桡骨头骨折块26块，平均2.2(±0.6)块，非三联佂损伤者桡骨头骨折块17块，平均为1.5(±0.7)块。 结论：肘关节三联佂的桡骨头骨折块大多分布于前臂中立位的前外侧，绝大多数具有2-3块骨折块，属于Mason分型的II型/III型。计算机重建及虚拟复位、图像重叠融合技术，可以更好、更精确的对骨折块进行定量描述和统计分析。有助于提高医师对疾病的理解。

Purpose：To measure the locationof fractures radial head using quantitative 3-dimensional computed tomography (CT). Materials and methods: We measured the fracture lines with respect to the biceps tuberosity in 24 patients with a displaced articular fracture of part of the radial head (12 terrible traid injury and 11 other injury). Results: 23 fractures created 43 fragments (average 1.9). In terrible traid injury, 12 fractures created 26 fragments, (average 2.2); In other injury cases, 11 fractures created 17 fragments (average 1.5). And the scattergram was created to show the centers of fragments. Conclusion: This quantitative analysis of CT scans of displaced articular fractures radial head confirms that the most common location is the anterolateral quadrant with the forearmin neutral rotation. Given the important role of the radial head in elbow stability, more accurate characterization of incomplete radial head fractures may improve our understanding of treatment and outcome of these fractures.