小児の脳シンチグラフィー—脳腫瘍例53例と非腫瘍例199例の分析

Characteristics of Brain Scintigraphy in Pediatric Age Group and its Diagnostic Value in Brain Tumors

Ⅰ．はじめに

　脳scintigraphyは，現在では頭蓋内疾患の安全な診断法としての価値は高い．しかしながら，本法に関する小児例の報告はきわめて少ない^{4，6，14，16，18，19，20，24，29，31，32，33，35）}．

　その理由のおもなものとしては，1）発育途上にある小児の被曝線量の問題^28），2）長時間，小児を安静にかつ正しい位置に固定することの困難さ，3）一般に，小児には後頭蓋窩腫瘍が多いが，従来，本検査法では後頭蓋窩腫瘍の診断率が低いといわれていたことなどであろう．

The diagnostic value of brain scintigraphy in intracranial diseases has been well recognized. Numerous reports have appeared in the literature concerning its use in adult cases. The reports dealing with pediatrics cases, however, are quite limited in number. The major factors limiting such studies in children may be considerd as follows; (1) infratentorial tumors are common in this age group, in which its diagnostic accuracy has been believed to be quite low, (2) problems of exposing children to radiation and (3) difficulty in keeping children in one position for a considerable length of time.