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目的：从实际研究比较两种估计粒子体积的新体视学方法─—核距测量法和垂直转距测量法的效率。方法：获取22个近似圆盘状的器官，从重量和比重计算出“真实”体积；通过器官中心作垂直于器官某一面的四个同轴且互相垂直的随机垂直截面，用铅笔将这些剖面轮廓描于纸上，然后据上述两种方法估计各个器官的体积。结果：从重量及比重计算的22个器官的“真实”体积为450±87cm3（平均值±标准差），从核距和转距测量法估计的体积分别为447±157和459±95cm3，前者的标准差显著高于后者（F检验，P＜0．05）；据核距和转距测量法，从每个器官的四个剖面估计的四个体积之间的变异系数分别为47±27％和32±14％，前者显著高于后者（t检验，P＜0．05））。结论：垂直转距测量法比核距测量法更有效。
OBJECTIVE: To compare two new stereoscopic methods for estimating particle volume from practical studies ─ the efficiency of the nuclear distance measurement and the vertical torque measurement method. METHODS: Twenty-two approximately disk-shaped organs were obtained, and the “true” volume was calculated from their weights and specific gravities; four orthogonal and perpendicular random cross-sections perpendicular to the organ through one center of the organ were pencil- The outline is drawn on paper and then the volume of each organ is estimated according to the above two methods. Results: The “true” volume of 22 organs calculated from weight and specific gravity was 450 ± 87 cm3 (mean ± standard deviation), and the volumes estimated from the nuclear distance and torque measurement were 447 ± 157 and 459 ± 95 cm3, respectively (F <0.05, P <0.05). The coefficient of variation (CV) of the four volumes estimated from the four sections of each organ were 47 ± 27% and 32 ± 14%, the former was significantly higher than the latter (t test, P <0.05)). Conclusion: Vertical torque measurement is more effective than distance measurement.