• 제어로봇시스템학회:학술대회논문집
• /
• 1996.10b
• /
• pp.109-112
• /
• 1996

The more integrated and smaller SMD are needed, new solder joints packaging technologies are developed in these days such as BGA(Ball Grid Array), Flip Chip, J-lead etc. But, it's unable to inspect solder joints in those devices by visual inspection methods, because they are hided by it's packages. To inspect those new SMD packages, an X-ray system for acquiring a cross-sectional image of a arbitrary plane is necessary. In this paper, an analysis for designing X-ray cross sectional imaging system is presented including the way for correcting the distortion of image intensifier. And we show computer simulation of that system with a simple PCB model to show it's usefulness in applying PCB solder joint inspection.

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2008.11a
• /
• pp.633-634
• /
• 2008

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2012.05a
• /
• pp.879-880
• /
• 2012

• Proceedings of the Korean Society of Precision Engineering Conference
• /
• 2010.05a
• /
• pp.827-828
• /
• 2010

• The Transactions of the Korean Institute of Electrical Engineers B
• /
• v.51 no.1
• /
• pp.34-39
• /
• 2002

Most X-ray generator had been used do rectifier type transformer high tension generator which is supplied in a clinical diagnosis. But it is difficult to miniaturize and become light weight. Also, because the ripple rate of tube voltage is high, X-ray generating efficiency is very low. Therefore, it is supplied gradually from abroad being developed high tension generator for inverter type X-ray generator which use semi-conductor switching element for electric power that have high speed switching ability to solved these problem. But, semi-conductor element of big capacity are used by X-ray tube's big consumption power and diffusion is difficult in the small size hospital because production cost is ascending by doing digital control through DSP and product price becomes expensive. Therefore, in this paper, design and manufactured CR type voltage divider for feedback control of tube voltage of high frequency resonance type inverter and high tension transformer for high frequency to apply economical diffusion type X-ray generator which have wide output voltage and load extent. It is Proved do X-ray generator and stability of X-ray tube's output characteristics through an experiment.

• Journal of the Korean Society of Radiology
• /
• v.4 no.3
• /
• pp.27-31
• /
• 2010

Spatial resolution is determined by the performance of x-ray optics used in the x-ray imaging system. A zone plate was designed for obtaining a high spatial resolution image at x-ray energy of 8.5keV. A spatial resolution of 80 nm was estimated by the ray tracing when an x-ray tube of tungsten targe was used instead of synchrotron radiation. The designed zone plate of outermost zone width of 40nm was successfully fabricated by the electron-beam lithography.

• Proceedings of the Korea Information Processing Society Conference
• /
• 2017.04a
• /
• pp.1060-1061
• /
• 2017

방사선 로봇 시스템은 X-Ray를 이용하는 로봇 기반 자동 치료 시스템으로 방사선 치료계획 시스템, 방사선가속기, 방사선 치료 로봇, 호홉 추적 시스템, 스마트베드로 구성된다. X-Ray를 이용하는 치료 시스템인 관계로 안정적인 제어가 요구되며, 환자의 호흡에 의한 병소 위치 변위 발생에도 X-Ray를 병소에 정확하게 정량 조사해야한다. 본 논문에서는 방사선 로봇 시스템을 구성하는 서브시스템 간의 데이터 송수신 동기화와 시스템 안정성 확보, 그리고 시스템 통합을 위한 문서 작업을 획기적으로 줄이면서 시스템 통합을 단시간에 수행한 과정에 대하여 기술한다.

• 제어로봇시스템학회:학술대회논문집
• /
• 1997.10a
• /
• pp.1528-1535
• /
• 1997

Many radiological modalities has been applied to medicine as a basic fundamental diagnosis and therapy recently. The prevalence of computer systems affect most images to be digitized. However conventional X-ray film images are not digital images eventhough they covers 70% of all radiologica images. This is the hinderacne of building PACS. In this paper all radiological digital imaging parts such as DSA. CR. MRI. SPECT. PET and ultrasonography were briefly introduced and the applications were described. In brief digital radiography contribute to enhance the medical service quality. And the digital substituition of conventional X-ray film image is inevitable.

• Journal of Biomedical Engineering Research
• /
• v.5 no.2
• /
• pp.149-154
• /
• 1984

A digital X-ray system was designed using photo-diode arrays. This system consists of the following five sub-units; (1) slit and driving system (2) X-ray detection system (3) data-conversion system (4) computer (5) image display system. Using this system, one can obtain scatter-free, high contrast, digitally formatted, high quality image, as compared with the conventional film-based X-ray system.

• The Transactions of the Korean Institute of Electrical Engineers P
• /
• v.56 no.1
• /
• pp.19-22
• /
• 2007

We developed a low cost digital X-Ray image capturing system using a CCD camera, instead of using the high cost image plate and image intensifier. In order to reduce the system volume, we directly made the dark box shorter than the previous model. Using the graphic language, we developed a program in order for post-processing the images captured by the CCD camera. This program improves the image resolving power.