Development of laser-disk file system for the storage and analysis of analog-data acquired in physiological studies.

在生理研究中获得的数据，如脑电图、心电图、肌电图和流量-容量曲线，要求在每家医院至少保存5年。由于这些数据存储在记录表中，并且积累了如此多的数据，因此在医院每年都很难找到一个存储它们的空间。本研究旨在通过使用视盘来解决这一问题。系统由脑电图记录仪、模数转换器、缓冲存储器（16通道，256 KB/通道）、计算机（Harris h - 300a）、光盘（DF-O 400，东芝）、智能显示器（KEL 305B,Daikin）和硬拷贝机（HA 241A,Daikin）组成。脑电图机信号数字化（100hz， 8位），暂存于缓冲存储器（Hotta Musen），传输到与计算机接口的光盘（Harris h - 300a）上。存储在光盘上的信号包括12路脑电图信号、1导联心电信号和机器或患者状态信号，通过触笔选择合适的指令显示在CRT上。在磁盘上或磁盘上存储或调取全部数据（每个患者约30分钟的记录）所需的时间约为20分钟。通过该系统，可以在一个磁盘上存储约3000例患者的脑电图数据，并且可以非常快速地检索或调用磁盘中的任何数据。由于该系统提供了一个可靠的数据库，可用于任何类型的数值分析，因此它将成为未来数据存储的标准方法。

The data acquired in physiological studies such as EEG, ECG, EMG, and flow-volume curves are required to be kept in each hospital at least for five years. Because these data are stored in the recording sheets and have accumulated so much, it is gettig difficult every year to find a space to store them in the hospital. This study was designed to solve this problem by the use of optic disks.Our system consists of EEG recorder, analog-to-digital converter, buffer memory (16 channels, 256 KB/channel), computer (Harris H-300 A), optic disk (DF-O 400,Toshiba), intelligent display (KEL 305B,Daikin), and hard copy machine (HA 241A,Daikin).The signals from EEG machine were digitized (100 Hz, 8 bit), stored temporarily in the buffer memory (Hotta Musen), and transferred to the optic disk which was interfaced with the computer (Harris H-300 A). The signals stored in the optic disk which included 12 channels of EEG signals, one lead of ECG signal, and machine or patient status signals were displayed on the CRT by selecting appropriate commands using a stylus pen. The time required to store or recall the whole data (records of about 30 minutes duration per patient) on or from the disk took about 20 minutes. By this system it becomes possible to store the EEG data of about 3,000 patients in one disk, and search or recall any data in the disk very fast. Since our system provides a reliable database which can be used for numerical analysis of any kinds, it will become a standard method of data storage in future.