1995年5月における日本の脳ドックの現状

抄録

We report the results of a nationwide survey of brain docks that was conducted in May 1995.
As of May 1995, 412 institutions in Japan were equipped with a brain dock system, and doctors in 241 (58.5%) of these institutions belong to the Japanese Society for Detection of Asymptomatic Brain Disease. The highest concentration of institutions equipped with a brain dock system was Tokyo Metropolis, which has 48 institutions (11.7%), and 35.7% of the institutions were located in the Kanto area. Saga was the only prefecture that had no institution with a brain dock system. As for the administrative foundations, hospitals operated by medical corporations comprised the largest percentage at 40.9%, and there were also 7 university hospitals.
Regarding the examination protocols of the brain dock program, the execution rate of MRI and MRA were 98.0% and 95.4%, respectively, and intellectual tests were performed in 36.8% of the institutions.
The MR equipment used in the brain dock included 1.5 tesla (37.2%), 1.0 T (20.6%), and 0.5 T (38.6%). The detection rate of asymptomatic cerebral infarctions varied greatly from 1.1% to 56% according to the institution, with an average of 18.6%. The detection rate of unruptured cerebral aneurysms was 1-3% in 44.8% of the institutions, 3-5% in 18.8%, and more than 5% in 20.8%. Of the institutions with a brain dock system 77.3% apply neck clipping to the treatment of detected aneurysms. Of all the respondents, 82.7% emphasized the need to increase the number of institutions equipped with brain dock systems.