Monolithically integrated X-ray detector arrays for computed tomography
- Spire Corp., Bedford, MA (United States)
- Univ. of South Florida, Tampa, FL (United States). Dept. of Electrical Engineering
- Univ. of Delaware, Newark, DE (United States). Inst. for Energy Conversion
- Analogic Corp., Peabody, MA (United States)
- Picker International, Highland HTS, OH (United States)
The design and performance of a high sensitivity monolithic X-ray detector array fabricated by depositing CdTe photodiodes on CdWO{sub 4} scintillators for computed tomography (CT) are presented. CdTe photodiodes offer improved sensitivity due to the better match to the CdWO{sub 4} scintillator emission spectrum than the Si photodiodes used in current CT scanners. A CdTe photodiode fabricated on glass mechanically stacked to a CdWO{sub 4} scintillator showed 30% improvement in signal strength over Si photodiodes stacked to CdWO{sub 4}. Monolithic X-ray detector arrays were fabricated by depositing a CdTe photodiode structure on CdWO{sub 4} using close-spaced sublimation technique. Preliminary results on the detector`s X-ray response, signal-to-noise ratio and the X-ray temporal response show that monolithic CdTe X-ray detectors are suitable for practical CT scanner applications.
- Sponsoring Organization:
- National Cancer Inst., Bethesda, MD (United States)
- OSTI ID:
- 323898
- Report Number(s):
- CONF-971201-; TRN: 99:004424
- Resource Relation:
- Conference: 1997 fall meeting of the Materials Research Society, Boston, MA (United States), 1-5 Dec 1997; Other Information: PBD: 1998; Related Information: Is Part Of Semiconductors for room-temperature radiation detector applications 2; James, R.B. [ed.] [Sandia National Labs., Livermore, CA (United States)]; Schlesinger, T.E. [ed.] [Carnegie Mellon Univ., Pittsburgh, PA (United States)]; Siffert, P. [ed.] [Lab. PHASE/CNRS, Strasbourg (France)]; Dusi, W. [ed.] [Inst. TESRE/CNR, Bologna (Italy)]; Squillante, M.R. [ed.] [Radiation Monitoring Devices, Inc., Watertown, MA (United States)]; O`Connell, M. [ed.] [Dept. of Energy, Washington, DC (United States)]; Cuzin, M. [ed.] [LETI/CEA, Grenoble (France)]; PB: 681 p.; Materials Research Society symposium proceedings, Volume 487
- Country of Publication:
- United States
- Language:
- English
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