[en] The high performance video image processing system with a microcomputer has been applied to various fields during recent years. In this paper, a video image processing system with a Z-80 (4MHz clock, 48KB DRAM) microcomputer and its application to neutron radiography are presented. The system has the following peripheral I/O devices; a TTY to control the system, a digital cassette tape recorder and two floppy disk drives to store the programs and the image data, a dot image printer to make a copy of an image on a CRT and a RS-232C interface to communicate with a host computer. The monitor and preliminary image processing softwares were developed with the machine language and stored in EPROMs (2708). The video image signals from the TV camera are digitized with about 33msec conversion-time/frame through a video A/D converter (ADC). The digitized image data can be stored in the image buffer (32KB DRAM) linked through the window address of the microcomputer system. The digitized pictures are taken with 16 levels of gray scale and resolved to 240 x 256 picture elements (pixels) on a monochrome CRT and displayed with 16 distinct colors on a RGB video display. The neutron radiography system installed at the E-2 experimental hole of the KUR(Kyoto University Reactor) has been available for some applications in non-destructive testing. To obtain real time radiographic images a video image processing system has been introduced in this facility. The resolution of image was obtained as about 0.5mm by a super highquality X-ray camera using a NE-426 neutron scintillator. The images of a NE-426 on CRT monitors can be observed directly and visually, and so many test samples can be continuously checked for industrial purpose. The direct image of this system could be satisfactory for penetrating the side plates to test MTR type reactor fuels and for the investigation of moving objects. (J.P.N.)

No abstract available

[en] The real-time neutron radiography system of the Kyoto University Reactor (KUR) has been practically applied to penetrating the side plates containing boron burnable poison to test MTR type reactor fuels and to investigation of moving objects. Compared with the image obtained by the direct film method, however, the image from the TV system is in low-contrast and poor-resolution. This paper presents some digital processing approaches to improve the image quality and the neutron TV system is successfully applied to neutron computed tomography (NCT). The frame summing technique is effective to increase the quality of the radiographic image. By using the NTV system in NCT, the projection data are able to be acquired in a single measurement as observing the projection image on a CRT monitor. Two weighting functions based on the Fourier-convolution algorithm are employed to obtain the reconstructed image. The image quality could be satisfactory to distinguish acrylic resins, stainless steel and copper and to observe a small hole of 1.5 mm in diameter filled up with water. (author)

[en] The research on neutron radiography in Research Reactor Institute, Kyoto University was begun in 1974 using the E-2 experimental hole which was designed for neutron irradiation. It was reconstructed for the excellent performance as neutron radiography facility by fixing aluminum plugs, a collimator and so on. The research activities thereafter are briefly described. In 1989, the cold neutron facility was installed in the graphite thermal neutron facility, and the experiment on cold neutron radiography became feasible. The reactor in Kyoto University is of the thermal output of 5 MW, and is put to the joint utilization by universities and research institutes in whole Japan. The experimental items carried out so far are enumerated. At present, the main subjects of research are the development of the standard for establishing image evaluation method, the analysis of gas-liquid two-phase flow, the construction of the data base for the literatures and images of neutron radiography, the application of cold neutron radiography, the development of the imaging method using fast neutrons and so on. The thermal neutron radiography and the cold neutron radiography facilities of Kyoto University research reactor are described. The research and activities at Kyoto University research reactor and the investigation of problems are reported. (K.I.) 56 refs

No abstract available

[en] We prospectively evaluated for the visualization of normal bronchial arteries to 19 patients, who took 16ch multidetector row CT (MDCT) examination with rapid injection of the contrast material. MDCT, such as 0.625 mm detector, 0.5 sec/rotation, 10 mm X ray collimation, 1:1.375 pitch. With paging observation using 5 mm maximum intensity projection (MIP) with 0.7 mm interval reconstruction, 79% of right bronchial artery and 90% of left bronchial artery were depicted. (author)

[en] For neutron radiography (NR), photographic techniques have been mainly used for many years. To observe a dynamic event and to test many samples, the real-time neutron radiography (i.e. neutron television - NTV) system has been introduced at the E-2 experimental tube of the Kyoto University Research Reactor (KUR). The NTV system has been practically applied to penetrating the side plates containing boron burnable poison to test MTR type reactor fuel, to investigation of moving objects and to neutron computed tomography (NCT). New approaches using some advanced neutron converters, a high sensitive and resolution TV camera and a high performance image processing system are being undertaken for standard indicators, visualization on air-water two-phase flow, NCT and so on. (author)

[en] Metal silicides are very attractive materials for low resistivity FET gates and interconnection. For the better control of characteristics of silicides/Si contacts, reaction kinetics of the contacts and associated phenomena have to be clarified. In the present work, redistribution of As atoms implanted into Si during Pd₂Si formation has been investigated by means of neutron activation analysis and sheet resistivity and Hall effect measurement. (author)

[en] The radiography facility for thermal neutron has been installed at the E-2 experimental hole of the Kyoto University Reactor (KUR) since 1974 and provided good characteristics. To observe a dynamic event and to test many samples, the real-time neutron radioscopy (i.e. neutron television - NTV) system has been introduced to this facility since 1980 and practically applied to various applications with image processing techniques. Recently a cold neutron beam hole (CN-2) has been available at the graphite column and preliminary radiographic tests were tried. In this paper, these neutron radiography systems and brief explanations for some of applications at KURRI are described. (author)

[en] The influence of medium dose ion implantation on the dielectric breakdown reliability of thin gate oxide is discussed. Medium dose ion implantation and subsequent high temperature oxidation degrade the dielectric breakdown characteristics of metal oxide semiconductor capacitors. The deterioration of breakdown characteristics strongly depends on ion species, dose, oxidation temperature, and oxidation ambient. The dielectric breakdown fields and charge to breakdown (Q_BD) reduce, drastically at doses of 5 x 10¹³, 1 x 10¹⁴, and 5 x 10¹⁴ cm^-2 for the arsenic (As⁺), phosphorites (P⁺), and boron (B⁺) implantation, respectively. The breakdowns occur due to weak spots formed along the localized oxidation of silicon (LOCOS) edge by the combination of medium dose ion implantation,high temperature oxidation, and residual stress near the LOCOS edge