Design and Characterization of the I-ImaS Multi-Element X-Ray Detector System

I-ImaS (Intelligent Imaging Sensors) is a European project aiming to produce new, intelligent X-ray imaging systems using novel APS sensors to create optimal diagnostic images. Initial systems have been constructed for medical imaging; specifically mammography and dental encephalography. However, th...

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Bibliographic Details
Published in:IEEE transactions on nuclear science 2008-06, Vol.55 (3), p.827-832
Main Authors: Griffiths, J.A., Metaxas, M.G., Royle, G.J., Venanzi, C., Esbrand, C., Cavouras, D., Fant, A., Gasiorek, P., Georgiou, H., Hall, G., Jones, J., Leaver, J.D.G., Longo, R., Manthos, N., Noy, M., Ostby, J.M., Rokvic, T., Schulerud, H., Theodoridis, S., Triantis, F.A., Turchetta, R., Speller, R.D.
Format: Article
Language:English
Subjects:
Active pixel sensors
CMOS
CMOS image sensors
Detectors
Diagnostic systems
Field programmable gate arrays
Homeland security
Image sensors
Imaging
Intelligent sensors
Intelligent systems
Optical imaging
scintillators
Sensor arrays
Sensor phenomena and characterization
Sensor systems
Sensors
Studies
X-ray detectors
X-ray imaging
X-rays
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Summary:I-ImaS (Intelligent Imaging Sensors) is a European project aiming to produce new, intelligent X-ray imaging systems using novel APS sensors to create optimal diagnostic images. Initial systems have been constructed for medical imaging; specifically mammography and dental encephalography. However, the I-ImaS system concept could be applied to all areas of X-ray imaging, including homeland security and industrial QA. The I-ImaS system intelligence is implemented by the use of APS technology and FPGAs, allowing real-time analysis of data during image acquisition. This gives the system the capability to perform as an on-the-fly adaptive imaging system, with the potential to create images with maximum diagnostic information within given dose constraints. The I-ImaS system uses a scanning linear array of scintillator-coupled 1.5-D CMOS Active Pixel Sensors to create a full 2-D X-ray image of an object. This paper describes the parameters considered when choosing the scintillator elements of the detectors. A study of the positioning of the sensors to form a linear detector is also considered, along with a discussion of the potential losses in image quality associated with creating a linear sensor by tiling many smaller sensors. Preliminary results show that the detectors have sufficient performance to be used successfully in the initial mammographic and encephalographic I-ImaS systems that are currently under construction.
ISSN:0018-9499
1558-1578
DOI:10.1109/TNS.2008.2000477