Flat panel imaging system for fluoroscopy applications

被引:35
作者
Colbeth, RE [1 ]
Allen, MJ [1 ]
Day, DJ [1 ]
Gilblom, DL [1 ]
Harris, R [1 ]
Job, ID [1 ]
Klausmeier-Brown, ME [1 ]
Pavkovich, J [1 ]
Seppi, EJ [1 ]
Shapiro, EG [1 ]
Wright, MD [1 ]
Yu, JM [1 ]
机构
[1] Varian Associates Inc, Palo Alto, CA 94304 USA
来源
PHYSICS OF MEDICAL IMAGING | 1998年 / 3336卷
关键词
x-ray; imaging; flat panel; sensor; fluoroscopy; radiography; noise; amorphous silicon;
D O I
10.1117/12.317037
中图分类号
R318 [生物医学工程];
学科分类号
0831 ;
摘要
This paper describes a multi-mode, digital imager for real-time x-ray applications. The imager has three modes of operation: low dose fluoroscopy, zoom fluoroscopy, and high resolution radiography. These modes trade-off resolution or field-of-view for frame rate and additionally optimize the sensitivity of the imager to match the x-ray dose used in each mode. This large area sensing technology has a form factor similar to that of a film cassette, no geometric image distortion, no sensitivity to magnetic fields, a very large dynamic range which eliminates repeat shots due to over or under exposure, 12 bit digital output and the ability to switch between operating modes in real-time. The imager, which consists of three modules: the Receptor, the Power Supply and the Command Processor, is intended as a component in a larger imaging system. Preliminary characterization of the prototype imager in fluoroscopic mode at entrance exposure rates down to 2.5 mu R/frame, indicates that the DQE(f), MTF and low contrast resolution are comparable to that obtained with an image intensifier tube (IIT) coupled to a video camera.
引用
收藏
页码:376 / 387
页数:12
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