Abstract

A curved image sensor on plastic foil has been developed for cone beam computed tomography (CBCT) X-ray imaging. The image sensor of about 6 × 8 cm2 size has been built on a thin polyimide foil with an indium gallium zinc oxide (IGZO) backplane and an organic photodetectors (OPD) frontplane. A flexible cesium iodide (CsI) scintillator has been attached to the optical sensor with 480 × 640 pixels of 126 µm size. Dark current density of the OPD was low with less than 10−7 mA/cm2 at −2 V, while an external quantum efficiency (EQE) of about 50% was reached in the visible wavelength range matched to the scintillator output. The image quality of the digital X-ray detector allowed for 3D reconstruction images of a bone phantom on a rotating stage with a lab setup. The curved detector with 32 cm curvature radius opens up the path for very compact CBCT gantries with largely reduced footprint.

Details

Title
Curved digital X-ray detectors
Author
van Breemen Albert JJM 1 ; Simon, Matthias 2 ; Tousignant, Olivier 3 ; Shanmugam Santhosh 4 ; van der Steen Jan-Laurens 4 ; Akkerman, Hylke B 4 ; Kronemeijer Auke 4 ; Ruetten, Walter 2 ; Raaijmakers, Rob 5 ; Alving Lex 5 ; Jacobs, Jan 5 ; Malinowski, Pawel E 6   VIAFID ORCID Logo  ; De Roose Florian 6   VIAFID ORCID Logo  ; Gelinck Gerwin H 7   VIAFID ORCID Logo 

1  Holst Centre/TNO, Eindhoven, The Netherlands 
2  Philips Research, Eindhoven, The Netherlands (GRID:grid.417284.c) (ISNI:0000 0004 0398 9387) 
3  Philips Healthcare, Best, The Netherlands (GRID:grid.417284.c) (ISNI:0000 0004 0398 9387); Teledyne Dalsa, Eindhoven, The Netherlands (GRID:grid.417284.c) 
4  Holst Centre/TNO, Eindhoven, The Netherlands (GRID:grid.417284.c) 
5  Philips Healthcare, Best, The Netherlands (GRID:grid.417284.c) (ISNI:0000 0004 0398 9387) 
6  imec, Leuven, Belgium (GRID:grid.15762.37) (ISNI:0000 0001 2215 0390) 
7  Holst Centre/TNO, Eindhoven, The Netherlands (GRID:grid.15762.37); Technical University Eindhoven, Department of Applied Physics, Eindhoven, The Netherlands (GRID:grid.6852.9) (ISNI:0000 0004 0398 8763) 
Publication year
2020
Publication date
2020
Publisher
Nature Publishing Group
e-ISSN
23974621
Source type
Scholarly Journal
Language of publication
English
DOI
https://doi.org/10.1038/s41528-020-00084-7
ProQuest document ID
2441102931
Copyright
© The Author(s) 2020. This work is published under http://creativecommons.org/licenses/by/4.0/ (the “License”). Notwithstanding the ProQuest Terms and Conditions, you may use this content in accordance with the terms of the License.