境田 通泰¹, 名取 道也¹, 吉田 丈児¹, 田中 守¹, 河野 八朗¹, 小林 俊文¹, 野沢 志朗¹, 甲子 乃人²

Michiyasu SAKAIDA¹, Michiya NATORI¹, Joji YOSHIDA¹, Mamoru TANAKA¹, Hachiro KONO¹, Toshifumi KOBAYASHI¹, Shiro NOZAWA¹, Nobuto KOHSHI²

¹慶應義塾大学医学部産婦人科学教室, ²東芝メディカル株式会社

¹Depertment of Obstetrics and Gynecology, School of Medicine, Keio University, ²Toshiba Medical Sysytem Co., Ltd

キーワード : Sonogram, Digital filing , Optical-magnet disk, Image quality , Micro computer

A data filing system for sonograms has been developed for use a micro computer system and an optical-magnet disk. Though analogue data filing sysytems can access images in a very short time, the quality of the stored data, however, deteriorates each time it is accessed. The digital filing systems could not stand in a clinic use due to its slow speed or the expensive price.
This system consists of a micro-computer, the rewritable optical-magnet disk unit, the interface boards and the operation program. The interface boards connect the frame memory of the sonograph (SAL-77 A, Toshiba) to the bus line of the micro computer (PC-9801 UX, NEC). "C" and "Assembly" were used for the programing languages. On filing, the static image data on the frame memory is transferred to the main memory of the micro computer through the 8 bit parallel interface, and are stored in the opticalmagnet disk unit. On drawing out, the stored images are called in the reverse sequence to the CRT. This system requires no A/D or D/A canversion process, so resolutional deterioration does not occur different from the analogue systems.
This enabled the image duplication without deterioration and the images can be conserved with the original quality.