Performance of a novel 43-cm x 43-cm flat-panel detector with CsI:Tl scintillator

Tatsuya Yamazaki; Tomoyuki Tamura; Makoto Nokita; Satoshi Okada; Shinsuke Hayashida; Yoshihiro Ogawa

doi:10.1117/12.534010

6 May 2004 Performance of a novel 43-cm x 43-cm flat-panel detector with CsI:Tl scintillator

Tatsuya Yamazaki, Tomoyuki Tamura, Makoto Nokita, Satoshi Okada, Shinsuke Hayashida, Yoshihiro Ogawa

Proceedings Volume 5368, Medical Imaging 2004: Physics of Medical Imaging; (2004) https://doi.org/10.1117/12.534010
Event: Medical Imaging 2004, 2004, San Diego, California, United States

Abstract

We have developed a novel flat-panel detector with CsI:Tl scintillator. The detector consists of a single piece 43cm x 43cm amorphous silicon thin-film transistor (TFT) array with MIS (metal-insulator-semiconductor) photoelectric converter having a pixel pitch of 160μm coated with a needle-like crystal CsI:Tl scintillator. Signal chain was totally revised from current detector utilizing an innovative sensor technology. The novel detector and current detector were equipped to a digital radiography system allowing a quantitative and comparative study. Results show that the novel detector has a linear response covering the radiographic exposure range. It has a moderate modulation transfer function (MTF) sufficient to the radiography tasks and effective to suppress the aliasing. The detective quantum efficiency (DQE) was almost twice than the current detector. The result of contrast-detail phantom exposed with a 1/2x dose level is equivalent to that of current detector with a 1x dose level. These results show that performance of novel detector is superior to and expected to reduce the patient dose in half than current detector due to higher DQE and innovative sensor technology.

Citation Download Citation

Tatsuya Yamazaki, Tomoyuki Tamura, Makoto Nokita, Satoshi Okada, Shinsuke Hayashida, and Yoshihiro Ogawa "Performance of a novel 43-cm x 43-cm flat-panel detector with CsI:Tl scintillator", Proc. SPIE 5368, Medical Imaging 2004: Physics of Medical Imaging, (6 May 2004); https://doi.org/10.1117/12.534010

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