Title :
A Medipix2-based imaging system for digital mammography with silicon pixel detectors
Author :
Bisogni, M.G. ; Delogu, P. ; Fantacci, M.E. ; Mettivier, G. ; Montesi, M.C. ; Novelli, M. ; Quattrocchi, M. ; Rosso, V. ; Russo, P. ; Stefanini, A.
Author_Institution :
Dipt. di Fisica, Univ. di Pisa, Italy
Abstract :
We present the first tests of a digital imaging system based on a silicon pixel detector bump bonded to an integrated circuit operating in single-photon counting mode. The X-ray sensor is a 300-μm-thick silicon, 14×14 mm2 sensitive area, upon which a matrix of 256 × 256 (65536) square pixel, 55 μm in side, has been built. The readout chip, named MEDIPIX2, has been developed at CERN within the MEDIPIX2 collaboration and it is composed by a matrix of 65536 readout channels exactly with the same geometry of the detector. The spatial resolution properties of the system have been assessed by measuring the square-wave resolution function and the first images of a standard mammographic phantom were acquired using a radiographic tube in the clinical irradiation condition.
Keywords :
X-ray detection; biomedical electronics; biomedical imaging; gamma-ray detection; integrated circuits; mammography; nuclear electronics; phantoms; position sensitive particle detectors; readout electronics; silicon radiation detectors; 14 mm; 256 pixel; 300 micron; 55 micron; 65536 pixel; CERN; MEDIPIX2 readout chip; Medipix2-based imaging system; X-ray sensor; bump bonding; clinical irradiation condition; digital imaging system; digital mammography; integrated circuit; radiographic tube; signal-to-noise ratio; silicon pixel detectors; single-photon counting mode; spatial resolution properties; square-wave resolution function; standard mammographic phantom; Circuit testing; Detectors; Digital images; Integrated circuit testing; Mammography; Optical imaging; Pixel; Silicon; Spatial resolution; System testing;
Journal_Title :
Nuclear Science, IEEE Transactions on
DOI :
10.1109/TNS.2004.839079
