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

页码：376 / 387

页数：12