George A Mataraza

US Patent:

6563121, May 13, 2003

Filed:

Mar 2, 2000

Appl. No.:

09/517492

Inventors:

Robert S. Schreiner - Chagrin Falls OH
George Mataraza - Euclid OH
Csaba M. Rozsa - Brecksville OH

Assignee:

Saint Gobain Industrial Ceramics, Inc. - Worcester MA

International Classification:

G01T 1202

US Classification:

250368, 25037011

Abstract:

A gamma camera plate incorporates scintillation crystal which is sufficiently thick to effectively capture high energy radiation. The crystal is provided on its light output side with an array of light path-modifying partitions which extend partly through its thickness. These partitions define individual light collimating cells which reduce the light spreading which would otherwise prevent effective use of the plate for low energy radiation.

US Patent:

6881960, Apr 19, 2005

Filed:

Mar 24, 2003

Appl. No.:

10/395325

Inventors:

Robert S. Schreiner - Chagrin Falls OH, US
George Mataraza - Euclid OH, US
Csaba M. Rozsa - Brecksville OH, US

Assignee:

Saint-Gobain Industrial Ceramics, Inc. - Worcester MA

International Classification:

G01T001/202

US Classification:

250368, 25037011

Abstract:

A gamma camera plate incorporates scintillation crystal which is sufficiently thick to effectively capture high energy radiation. The crystal is provided on its light output side with an array of light path-modifying partitions which extend partly through its thickness. These partitions define individual light collimating cells which reduce the light spreading which would otherwise prevent effective use of the plate for low energy radiation.

US Patent:

6909097, Jun 21, 2005

Filed:

Apr 3, 2002

Appl. No.:

10/115596

Inventors:

Robert S. Schreiner - Chagrin Falls OH, US
John A. White - Chagrin Falls OH, US
Michael R. Mayhugh - Shaker Heights OH, US
George Mataraza - Euclid OH, US
Csaba M. Rozsa - Chagrin Falls OH, US
Daniel J. Herr - Twinsburg OH, US

Assignee:

Saint Gobain Ceramics and Plastics, Inc. - Worchester MA

International Classification:

G01T001/202

US Classification:

250366, 250367

Abstract:

A radiation detector, in particular a gamma camera, is constructed and operated in such a fashion that only a predetermined number of light sensors (such as PMT's) adjoining each other in a cluster are used to generate a signal with amplitude and event position information. The camera may also use an array of individual scintillation elements (crystals) in place of a single crystal, with certain advantages obtained thereby. According to another aspect of the invention, there is a reflector sheet that defines an array of apertures through which scintillation light can pass from the scintillation crystal to a plurality of light sensors optically coupled to an optical window in an array corresponding to the array of apertures in the reflector.

US Patent:

7138633, Nov 21, 2006

Filed:

Jan 23, 2004

Appl. No.:

10/764342

Inventors:

Csaba M. Rozsa - Brecksville OH, US
George A. Mataraza - Euclid OH, US

Assignee:

Saint-Gobain Ceramics & Plastics, Inc. - Worcester MA

International Classification:

G01T 1/20

US Classification:

250368, 250361 R

Abstract:

A scintillation detector apparatus comprising a filter disposed intermediate a scintillator and a detector, the filter being adapted to block relatively long wavelengths of light to reduce afterglow. The detector apparatus may, for example, be a part of a detector system such as a CT scanner, a RG system, or a geophysical measurement system.

US Patent:

40669084, Jan 3, 1978

Filed:

Mar 31, 1976

Appl. No.:

5/672206

Inventors:

Mohammad R. Farukhi - Willoughby OH
George A. Mataraza - Euclid OH
Oley D. Wimer - Euclid OH

Assignee:

The Harshaw Chemical Company - Cleveland OH

International Classification:

G01J 158

US Classification:

250483

Abstract:

A scintillation detector assembly is described which employs a scintillation phosphor such as a thallium activated sodium iodide crystal, wherein a blind hole is machined in the crystal to improve the efficiency of measuring the degradation rate of a radioactive material placed therein. The performance of the assembly is defined by the energy resolution of the radiation emanating from the radioactive source. This performance is improved by balancing the collection of light from areas of low and high light collection. This is achieved by suitably preparing the surfaces of the crystal and by controlling the reflectivity of these surfaces using controlled and fixed reflectivity material such as optical filters, cellulose ester-type fibrous paper and like materials. Improvements in resolution of 30 - 50% over prior art well assemblies have been measured for radioactive sources such as. sup. 129 I. sub. 53.