臨床神経学的エックス線頭蓋計測について（II）—正常人約500名，異常例約50例についての統計および各計測法の検討

ROENTOGENCRANIOMETRY IN CLINICAL NEUROLOGY

III．松果体石灰化像に関する計測

A．松果体石灰化像の確認頻度

　単純撮影側面像上で松果体石灰化像の有無をみる場合に，その位置の目安を知る方法として次のようなものがある（竹内^19））。

　①岩様骨上縁より3cm上方とする方法

1) A methodological study of the roentgen-craniometry in clinical neurology is made-problems in identifying the landmarks on the craniogram and problems of errors due to the technic of projection and mensura-tion are discussed.

2) A statistical study is made on plain craniograms of ca.500 normal individuals and ca.50 patients by the following items: ① Measurements of the cranium as a whole ② Measurements pertaining to basilar im-pression and platybasia ③ Localization of the pineal calcification ④ Measurements of sella turcica.

3) Among the base lines for the measurement of basilar impression McGregor's line, orbi-tooccipital line and Fischgold-Metzger' di-gastric line have proved to be more useful.

4) Three new methods for the localization of the pineal calcification are proposed: ① The polar coordinates method originated on the tuberculum sellae. ② The rectangular coordinates method originated on the tuber-culum sellae. ③ The rectangular coordinates method based on the clivus line. These co-ordinates methods based on the base of the skull have proved to be both more convenie-nt and effective than the con-ventional methods. such as Vastine-Kinney method