CdZnTe detector arrays for low-dose x-ray fluoroscopy

Joseph A. Heanue; David A. Pearson; Robert Erhard Melen

doi:10.1117/12.368174

6 October 1999 CdZnTe detector arrays for low-dose x-ray fluoroscopy

Joseph A. Heanue, David A. Pearson, Robert Erhard Melen

Proceedings Volume 3770, Medical Applications of Penetrating Radiation; (1999) https://doi.org/10.1117/12.368174
Event: SPIE's International Symposium on Optical Science, Engineering, and Instrumentation, 1999, Denver, CO, United States

Abstract

The Scanning-Beam Digital X-ray (SBDX) system promises low- dose cardiac fluoroscopy and angiography with excellent image quality. The system demands a detector capable of high count rates and excellent detection efficiency. Cadmium zinc telluride (CdZnTe) is well suited to these requirements. The SBDX detector comprises sixteen 3-mm-thick, 13.5 mm X 13.5 mm tiles arranged in a 4 X 4 array. Each tile has 144 imaging elements. Thus, the entire detector measures 54.0 mm X 54.0 mm and includes 2,304 imaging elements on a 1.125 mm pitch. Because the SBDX system has a geometric magnification of 3.3, the imaging-element size is consistent with a system spatial-resolution of 2.2 lp/mm. The 3-mm thickness is chosen to guarantee a stopping efficiency of more than 90% at 120 kVp. Each detector tile is flip-chip mounted to a custom-designed integrated circuit using indium bump bonding techniques. Fabricated in a 1.2-micrometers CMOS process, the IC includes high-speed photon-counting circuitry that operates at rates up to 5 X 10⁶ counts/s(DOT)mm². The circuitry is designed both to maximize the achievable count-rate and to minimize false double counts due to charge sharing between elements. Testing confirms that the detector performs with minimum cross talk between elements at count rates in excess of 2 X 10⁶ counts/s(DOT)mm². Measurements of the detective quantum efficiency are presented. The relationship between material properties and detector performance is also discussed.

Citation Download Citation

Joseph A. Heanue, David A. Pearson, and Robert Erhard Melen "CdZnTe detector arrays for low-dose x-ray fluoroscopy", Proc. SPIE 3770, Medical Applications of Penetrating Radiation, (6 October 1999); https://doi.org/10.1117/12.368174

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

Members: $17.00

Non-members: $21.00 ADD TO CART

PROCEEDINGS
8 PAGES

DOWNLOAD PAPER SAVE TO MY LIBRARY

GET CITATION

RIGHTS & PERMISSIONS

Get copyright permission Get copyright permission on Copyright Marketplace

KEYWORDS

Sensors

X-rays

X-ray detectors

Electronics

Fluoroscopy

Integrated circuits

Sensor performance

Show All Keywords

Keywords/Phrases

Search In:

Publication Years