Development of first domestic CT scanner

The first domestic CT scanner (Hitachi CT-H 250 prototype) was installed in FHUH on Oct. 1975.* It was a first-generation type head scanner equipped with water bag (see figure).

The very first clinical image was acquired on Oct. 16, 1975 (see figure) in which dilated ventricles were displayed as up-side-down due to a technical error.

The author collaborated in the process of CT development together with factory engineer (Hitachi Medico, co. Kashiwa factory, Chiba, Japan). This experience formed the basis for further CT development in FHUH.

This unit was eventually replaced by Hitachi CT-H 250 production model in 1976.

Hitachi and FHUH continued joint development of CT scanners until 1985, resulting in an additional three CT systems. These are CT-W2 prototype (3rd generation whole-body scanner), CT-W3 prototype (3rd generation whole-body scanner), and CT-HF prototype (second generation head scanner).

The Hitachi CT-H 250 prototype has been used for student education at Faculty of Radiological Technology, Fujita Health University, School of Health Sciences until April 4, 1998.

*This was the second CT unit in Japan. The first CT unit in Japan was EMI Mark1 which was installed in Tokyo Womens Medical College on Aug.1975.