<title>High-resolution digital radiography and three-dimensional computed tomography</title>

Real-Time X-Ray Image Processing; Techniques for Sensitivity Improvement Using Low-Cost Equipment

“…Image intensifier tubes typically have a spatial frequency limitation of about 2-5Ip/mm. We are presently investigating the use of a new compact scintillating glass material with better resolution and potentially better contrast sensitivity for use in real-time x-ray inspection [5]. One of the properties of the scintillating glass is that the light output at moderate dosages is extremely low.…”

Development of a 3D Cone Beam Facility Dedicated to the Detection of Small Flaws in Large Si3N4 Parts

“…More recently, slow scan CCD cameras were used with such systems [3]. Thanks to the improvement of CCD technology the last few years, an old technique of coupling scintillating screens to a camera became an alternative to the image intensifier for field of view as large as 20 cm in diameter [4]. This technique was in the past mainly used for digital radiography in nondestructive exarnination with field of view smaller than 5 cm in diameter [ 5] and was limited by the integration time of the camera and by the dynamic of the frame grabber.…”

Improvements on Low Cost CT Systems

“…We have used a 4x4x0.062 inch plate ofLockheed Formula LKH-6 Terbium glass [6] viewed by an intensified CCD camera. Figure 6a shows a CT image of 1 mm glass beads at 5x magnification and Fig.…”