Share Email Print
cover

Proceedings Paper

Flat x-ray image intensifier system for real-time fluoroscopy
Author(s): Hiroshi Onihashi; Hiroshi Aida; Kiyumi No; Takashi Noji; Yuichi Murakoshi; Keiichi Saito; Junsuke Koma
Format Member Price Non-Member Price
PDF $14.40 $18.00
cover GOOD NEWS! Your organization subscribes to the SPIE Digital Library. You may be able to download this paper for free. Check Access

Paper Abstract

A new flat X-ray image intensifier (Flat II) system, using a large-area electron multiplier for applications in real-time fluoroscopy imaging, is under development by the authors. The Flat II system, mainly consists of two devices; the image processing equipment and the image acquisition system by charge-coupled-device (CCD) camera. The image processing is performed as follows. The X-ray is converted to visual light by cesium iodide scintillator and to electrons by photo- cathode. A large-area electron multiplier is located adjacent to the photo-cathode, and amplifies electron current up to a few hundred times. Amplified electrons are again converted to bright visual image by the output phosphor screen. The bright visual image is subsequently detected with a CCD camera system. The electron multiplier used for present work is that of metal-dynode array construction. The principle of metal- dynode electron multipliers is well known. Since it is technically difficult to make the electron multiplier with a fine pitch, sufficient resolution could not be obtained until now. However, we could manufacture that of 6-inches (15 cm) size with 0.3 mm and 0.2 mm pitch, and manufactured the prototype Flat II system using the 0.3 mm pitch multiplier as an experiment. We acquired the fundamental characteristics and the image quality of prototype Flat II system. In this paper, the physical characteristics such as modulation transfer function (MTF), signal-to-noise ratio (SNR), etc. are discussed.

Paper Details

Date Published: 25 April 2000
PDF: 6 pages
Proc. SPIE 3977, Medical Imaging 2000: Physics of Medical Imaging, (25 April 2000); doi: 10.1117/12.384487
Show Author Affiliations
Hiroshi Onihashi, Toshiba Corp. (Japan)
Hiroshi Aida, Toshiba Corp. (Japan)
Kiyumi No, Toshiba Corp. (Japan)
Takashi Noji, Toshiba Corp. (Japan)
Yuichi Murakoshi, Toshiba Corp. (Japan)
Keiichi Saito, Toshiba Corp. (Japan)
Junsuke Koma, Toshiba Electric Engineering Corp. (Japan)


Published in SPIE Proceedings Vol. 3977:
Medical Imaging 2000: Physics of Medical Imaging
James T. Dobbins; John M. Boone, Editor(s)

© SPIE. Terms of Use
Back to Top