X片上用颅外径线推算颅腔体积的研究——其逐步回归方程式与评价

A STUDY OF THE VOLUME OF CRANIAL CAVITY CALCULATING FROM THE DIMENSION OF CRANIAL OUTER SURFACE IN X RAY FILMS——ITS STEPWISE REGRESSIVE EQUATION AND EVALUATION

为应用简便，本文对１８—７６岁正常成人１０４人（男６７，女３７）的Ｘ线正、侧位片上对颅外线或弧长等作了测量，并就其与颅腔体积的关系进行了认真的研究。用逐步回归分析法筛选出与推算颅腔体积的最佳因子为颅最大长（Ｘ１）、颅高（Ｘ２），颅宽（Ｘ３）、颅矢状弧（Ｘ６），它们之间呈正相关关系，其复相关系数Ｒ＝０．７４（女）±０．７９（男），均Ｐ０．０００１。建立逐步回归方程式：１．男：Ｙ＾＝１．７１Ｘ１＋０．６７Ｘ３＋２．８８Ｘ６－１７８８．０２（ｃｍ３）２．女：Ｙ＾＝５．３８Ｘ１＋５．３６Ｘ２＋６．１４Ｘ３－１５４１．７３（ｃｍ３）本方程可供推算成人颅腔体积使用。

Lateral and anteroposteror aspect X ray films were used to study the volume of cranial cavity in 104(male 67,female 37) adults(aged 18_76). The measurments including cranial maximum length (X 1), cranial height (X 2), cranial breadth (X 3), sagittal arc (X 6) were found to be the significant factors in calculating the brain volume. The multiple correlative coefficient is R=0.74(female)—0.79(male).P0.0001. The stepwise regressive equation is then obtained as 1.male:Y^=1 71X 1+9 67X 3+2 88X 6-1788 02(cm 3) 2.female:Y^=5 38X 1+5 36X 2+6 14X 3-1541 73(cm 3) The equation may be applied to calculate the volume of cranial cavity of the adult.