Improved page-size 127-um-pixel amorphous-silicon image sensor for x-ray diagnostic medical imaging applications

Richard L. Weisfield; Robert A. Street; Raj B. Apte; Andrew M. Moore

doi:10.1117/12.273983

2 May 1997 Improved page-size 127-um-pixel amorphous-silicon image sensor for x-ray diagnostic medical imaging applications

Richard L. Weisfield, Robert A. Street, Raj B. Apte, Andrew M. Moore

Author Affiliations +

Proceedings Volume 3032, Medical Imaging 1997: Physics of Medical Imaging; (1997) https://doi.org/10.1117/12.273983
Event: Medical Imaging 1997, 1997, Newport Beach, CA, United States

Abstract

This paper introduces a new high-resolution amorphous silicon (a-Si) image sensor specifically configured to demonstrate medical x-ray imaging capabilities. This new imager has an active pixel area of 243.84 mm X 195.072 mm, a pixel size of 127 micrometers X 127 micrometers , and an array size of 1536 data lines by 1920 gate lines, with over 2.95 million pixels. We have introduced a number of improvements both to the a-Si array itself and to the surrounding electronics to obtain a light sensitive area of 57 percent and a dataline capacitance of approximately 55 pF, which together provide enhanced signal/noise ratio. We have incorporated charge-sensitive amplifiers and 12 bit A/D converters, enabling us to achieve a sufficiently large dynamic range for medical imaging applications. We report on imager performance, including Signal/Noise, Modulation Transfer Function, and summarize other imaging characteristics. We compare these characteristics as a function of different x-ray phosphors and discuss avenues for future improvement.

Citation Download Citation

Richard L. Weisfield, Robert A. Street, Raj B. Apte, and Andrew M. Moore "Improved page-size 127-um-pixel amorphous-silicon image sensor for x-ray diagnostic medical imaging applications", Proc. SPIE 3032, Medical Imaging 1997: Physics of Medical Imaging, (2 May 1997); https://doi.org/10.1117/12.273983

ACCESS THE FULL ARTICLE

INSTITUTIONAL
Select your institution to access the SPIE Digital Library.

SELECT YOUR INSTITUTION

PERSONAL
Sign in with your SPIE account to access your personal subscriptions or to use specific features such as save to my library, sign up for alerts, save searches, etc.

PERSONAL SIGN IN

No SPIE Account? Create one

PURCHASE THIS CONTENT

SUBSCRIBE TO DIGITAL LIBRARY

50 downloads per 1-year subscription

Members: $195

Non-members: $335 ADD TO CART

25 downloads per 1 - year subscription

Members: $145

Non-members: $250 ADD TO CART

PURCHASE SINGLE ARTICLE

Includes PDF, HTML & Video, when available