The objective of this proposal is to develop a practical flat-panel x-ray imaging detector with programmable gain in order to address the increasing demand for wide dynamic range flat panel detectors in advanced x-ray imaging applications. The proposed detector employs three major components: a structured cesium iodide (CsI) scintillator to convert x-rays to optical photons;an avalanche amorphous selenium (a-Se) photoconductor, HARP (High-gain Avalanche Rushing amorphous Photoconductor), to convert the optical image to charge and provide a programmable gain;and a large area active matrix (AM) thin film transistor (TFT) array to read out the image electronically in real-time. The proposed detector has been named SHARP-AMFPI (Scintillator-HARP Active Matrix Flat-Panel Imager). It is capable of producing x-ray quantum noise limited images at the lowest dose expected for x-ray imaging (0.1

Public Health Relevance

In the proposed work we will develop the next generation x-ray flat-panel detectors for low dose imaging. It will increase the efficiency of x-ray detection in fluoroscopy by up to 5 times while maintaining the capability for dual mode fluoroscopy/radiography operation by virtue of programmable gain.

National Institute of Health (NIH)
National Institute of Biomedical Imaging and Bioengineering (NIBIB)
Research Project (R01)
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Study Section
Special Emphasis Panel (ZRG1-SBIB-P (02))
Program Officer
Lopez, Hector
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State University New York Stony Brook
Schools of Medicine
Stony Brook
United States
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Scheuermann, James R; Howansky, Adrian; Hansroul, Marc et al. (2018) Toward Scintillator High-Gain Avalanche Rushing Photoconductor Active Matrix Flat Panel Imager (SHARP-AMFPI): Initial fabrication and characterization. Med Phys 45:794-802
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Wronski, M; Zhao, W; Tanioka, K et al. (2012) Scintillator high-gain avalanche rushing photoconductor active-matrix flat panel imager: zero-spatial frequency x-ray imaging properties of the solid-state SHARP sensor structure. Med Phys 39:7102-9

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