PbO as direct conversion x-ray detector material

Matthias Simon; Ronald A. Ford; Anthony R. Franklin; Stefan P. Grabowski; Bernd Menser; Gerd Much; Augusto Nascetti; Michael Overdick; Martin John Powell; Detlef U. Wiechert

doi:10.1117/12.533010

6 May 2004 PbO as direct conversion x-ray detector material

Matthias Simon, Ronald A. Ford, Anthony R. Franklin, Stefan P. Grabowski, Bernd Menser, Gerd Much, Augusto Nascetti, Michael Overdick, Martin John Powell, Detlef U. Wiechert

Author Affiliations +

Proceedings Volume 5368, Medical Imaging 2004: Physics of Medical Imaging; (2004) https://doi.org/10.1117/12.533010
Event: Medical Imaging 2004, 2004, San Diego, California, United States

Abstract

A flat X-ray detector with lead oxide (PbO) as direct conversion material has been developed. The material lead oxide, which has a very high X-ray absorption, was analysed in detail including Raman spectroscopy and electron microscopy. X-ray performance data such as dark current, charge yield and temporal behaviour were evaluated on small functional samples. A process to cover a-Si TFT-plates with PbO has been developed. We present imaging results from a large detector with an active area of 18 × 20 cm². The detector has 1080 × 960 pixels with a pixel pitch of 184 μm. The linearity of detector response was verified. The NPS was determined with a total dark noise as low as 1800 electrons/pixel. The MTF was measured with two different methods: first with the analysis of a square wave phantom and second with a narrow slit. The MTF at the Nyquist frequency of 2.72 lp/mm was 50 %. We calculated first DQE values of our prototype detector plates. Full size images of anatomic and technical phantoms are shown.

Citation Download Citation

Matthias Simon, Ronald A. Ford, Anthony R. Franklin, Stefan P. Grabowski, Bernd Menser, Gerd Much, Augusto Nascetti, Michael Overdick, Martin John Powell, and Detlef U. Wiechert "PbO as direct conversion x-ray detector material", Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); https://doi.org/10.1117/12.533010

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