USA flag logo/image

An Official Website of the United States Government

TWO MILLIMETER PET SCINTILLATION DETECTOR ARRAY

Award Information

Agency:
Department of Health and Human Services
Branch:
N/A
Award ID:
16783
Program Year/Program:
1991 / SBIR
Agency Tracking Number:
16783
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
CTI SERVICES, INC.
810 INNOVATION DR KNOXVILLE, TN 37932
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 1
Fiscal Year: 1991
Title: TWO MILLIMETER PET SCINTILLATION DETECTOR ARRAY
Agency: HHS
Contract: N/A
Award Amount: $50,000.00
 

Abstract:

THE RESEARCH WILL LEAD TO THE DEVELOPMENT OF A VERY HIGH-RESOLUTION SCINTILLATION DETECTOR ARRAY FOR POSITRON EMISSION TOMOGRAPHY (PET) IMAGING. TWO ALTERNATIVE SCHEMES WILL BE INVESTIGATED TO IMPROVE THE IMAGE RESOLUTION AND QUANTITATIVE ACCURACY OF PET. THE FIRST WILL BE AN ADVANCE TO THE CURRENT "BLOCK" DETECTOR CONCEPT BASED ON AN 8X8 ARRAY OF BISMUTH GERMANATE (BGO), OR LEAD SULFATE (PBSO4) SCINTILLATION CRYSTALS COUPLED THROUGH A LIGHT GUIDE TO FOURPHOTOMULTIPLIER TUBES. THE CRYSTALS WILL BE SPACED 3MM APART BOTH AXIALLY AND TRANSAXIALLY AND SHOULD PROVIDE RESOLUTION OF APPROXIMATELY 2.5MM IN ALL DIRECTIONS. THE SECOND DETECTOR CONFIGURATION WILL USE SIMILAR SIZED ARRAY OF SCINTILLATORS BUT COUPLED TO A GRID OF SILICON PHOTODIODES TO DETERMINE THE INTERACTION DETECTOR, WITH A SINGLE LARGE PMT TO PROVIDE THE TIMING SIGNALS. PROTOTYPE DETECTORS WILL BE CUT FROM SOLID BLOCKS OF SCINTILLATOR AND TESTED FOR THE PHOTOELECTRON YIELD AND EVENT POSITIONING CHARACTERISTICS. THE LIGHT GUIDE WILL BE ADJUSTED TO PROVIDE MAXIMUM DIFFERENTIATION IN THE POSITIONING SIGNALS BETWEEN THE VARIOUS CRYSTALS OF THE ARRAY WHILE MAINTAINING HIGH LIGHT OUTPUT. ONCE THE LIGHTGUIDE DESIGNS HAVE BEEN DETERMINED, MORE DETAILED MEASUREMENTS WILL BE PERFORMED TO CHARACTERIZE THE POSITIONING ACCURACY, TIME RESOLUTION, ENERGY RESOLUTION, AND EFFICIENCY. THIS RESEARCH SHOULD PRODUCE THE HIGHEST RESOLUTION PET MODULAR DETECTOR DESIGN BASED ON FOUR PHOTOMULTIPLIERS. THE RESEARCH WILL LEAD TO THE DEVELOPMENT OF A VERY HIGH-RESOLUTION SCINTILLATION DETECTOR ARRAY FOR POSITRON EMISSION TOMOGRAPHY (PET) IMAGING. TWO ALTERNATIVE SCHEMES WILL BE INVESTIGATED TO IMPROVE THE IMAGE RESOLUTION AND QUANTITATIVE ACCURACY OF PET. THE FIRST WILL BE AN ADVANCE TO THE CURRENT "BLOCK" DETECTOR CONCEPT BASED ON AN 8X8 ARRAY OF BISMUTH GERMANATE (BGO), OR LEAD SULFATE (PBSO4) SCINTILLATION CRYSTALS COUPLED THROUGH A LIGHT GUIDE TO FOURPHOTOMULTIPLIER TUBES. THE CRYSTALS WILL BE SPACED 3MM APART BOTH AXIALLY AND TRANSAXIALLY AND SHOULD PROVIDE RESOLUTION OF APPROXIMATELY 2.5MM IN ALL DIRECTIONS. THE SECOND DETECTOR CONFIGURATION WILL USE SIMILAR SIZED ARRAY OF SCINTILLATORS BUT COUPLED TO A GRID OF SILICON PHOTODIODES TO DETERMINE THE INTERACTION DETECTOR, WITH A SINGLE LARGE PMT TO PROVIDE THE TIMING SIGNALS. PROTOTYPE DETECTORS WILL BE CUT FROM SOLID BLOCKS OF SCINTILLATOR AND TESTED FOR THE PHOTOELECTRON YIELD AND EVENT POSITIONING CHARACTERISTICS. THE LIGHT GUIDE WILL BE ADJUSTED TO PROVIDE MAXIMUM DIFFERENTIATION IN THE POSITIONING SIGNALS BETWEEN THE VARIOUS CRYSTALS OF THE ARRAY WHILE MAINTAINING HIGH LIGHT OUTPUT. ONCE THE LIGHTGUIDE DESIGNS HAVE BEEN DETERMINED, MORE DETAILED MEASUREMENTS WILL BE PERFORMED TO CHARACTERIZE THE POSITIONING ACCURACY, TIME RESOLUTION, ENERGY RESOLUTION, AND EFFICIENCY. THIS RESEARCH SHOULD PRODUCE THE HIGHEST RESOLUTION PET MODULAR DETECTOR DESIGN BASED ON FOUR PHOTOMULTIPLIERS.

Principal Investigator:

Ward Digby
Principal Investigator
6159667539

Business Contact:

Small Business Information at Submission:

Cti Group Inc
810 Innovation Dr Knoxville, TN 37932

EIN/Tax ID:
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No