Development of Photodensitometry System Using Laser Light Source

激光光源光密度测定系统的开发

• 批准号: 04670683
• 负责人: FUKUNAGA Masao
• 金额: $ 1.34万
• 依托单位: Kawasaki Medical School
• 依托单位国家: 日本
• 项目类别: Grant-in-Aid for General Scientific Research (C)
• 财政年份: 1992
• 资助国家: 日本
• 起止时间: 1992 至 1993
• 项目状态: 已结题
• 来源: https://kaken.nii.ac.jp/en/grant/KAKENHI-PROJECT-04670683/
• 关键词: bone mineral quantificati; photodensitometry; laser light source; photodensitometry; 骨塩是量; レーザー光線; ピン・フォト・ダイオード

During the past year, to put our photodensitometry system using a laser light source into practice, some experiments have been performed.The fundamental design of the equipment was partially changed : PIN photodiode and a homemade amplifier were replaced with commecially available ones. As Visual Basic, which is superior in its user interface, was found to be available on MS-DOS, programming by Quick Basic was changed to programming by Visual Basic. With regard to the conditions of the film scan, the diameter of the slit in the apparatus reciving light was temporarily set at 300mum, and the minimum moving distance of film was fixed at 100mum. It was also confirmed that other parameters could be determined in constant relation. With this system, the concentrations at an arbitrary point in the film, on a line between two pionts, and in a rectangular area could be measured. The results of the measurements obtained were saved as text-data.Because of limitations in the main memory volume (640KB) of the personal computer and in programming in arrangements of less than 64KB, FFT of one or two dimensions and processing of various data were used in combination with other software such as graph-softwafe (N graph) specified for the PC-98 and image processing software (NIH Image). Further accumulation of clinical data including application to microdensitometry is expected.

在过去的一年中，为了将我们使用激光光源的光密度测量系统付诸实践，进行了一些实验。设备的基本设计进行了部分改变：PIN光电二极管和自制放大器被替换为市售的。由于用户界面优越的 Visual Basic 被发现可以在 MS-DOS 上使用，因此将 Quick Basic 编程更改为 Visual Basic 编程。关于胶片扫描的条件，将装置接收光的狭缝直径暂时设定为300μm，胶片的最小移动距离固定为100μm。还证实其他参数可以按恒定关系确定。利用该系统，可以测量薄膜中任意点、两点之间的直线以及矩形区域内的浓度。将获得的测量结果保存为文本数据。由于个人计算机的主存储器容量（640KB）和小于64KB的编程的限制，一维或二维的FFT以及各种数据的处理与其他软件（例如PC-98专用的graph-softwafe（N graph）和图像处理软件（NIH Image））结合使用。预计临床数据的进一步积累，包括在显微密度测定中的应用。

项目成果

福永仁夫: "レーザー光源を用いたPhotodensitometry装置の開発" Innervision. 8. 29-30 (1993)

Hitoshi Fukunaga：“使用激光光源的光密度测定装置的开发”Innervision 8. 29-30 (1993)。

Masao Fukunaga: "Development of photodensitometry system using laser light source" Innervision. 8. 29-30 (1993)

Masao Fukunaga：“使用激光光源的光密度测量系统的开发”Innervision。