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Afterglow CsI(Tl) Scintillator for Medical Applications

Award Information

Agency:
Department of Health and Human Services
Branch:
N/A
Award ID:
71317
Program Year/Program:
2004 / SBIR
Agency Tracking Number:
CA092806
Solicitation Year:
N/A
Solicitation Topic Code:
N/A
Solicitation Number:
N/A
Small Business Information
Radiation Monitoring Devices, Inc.
44 Hunt Street Watertown, MA 02472-4699
View profile »
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No
 
Phase 2
Fiscal Year: 2004
Title: Afterglow CsI(Tl) Scintillator for Medical Applications
Agency: HHS
Contract: 9R44EB003382-02
Award Amount: $750,000.00
 

Abstract:

DESCRIPTION (provided by applicant): CsI doped with thallium is one of the most important scintillators currently in use. In terms of conversion of ionizing radiation to visible photons, it is the unquestioned leader in efficiency. Additionally, its high density, high atomic number, excellent light transport properties, high radiation resistance, easy availability, and low cost make it suitable for a wide variety of applications such as medical imaging and high energy physics. The one property of CsI(Tl) that limits its use in fast or time resolved applications is its afterglow. This causes problems in high count-rate applications, reconstruction artifacts in CT usage, and problems of reduced contrast and image blurring in high-speed imaging. If the afterglow in CsI(Tl) is quenched, this material could be effectively used in all these applications resulting in improved system performance with dramatic reduction in costs. To address this issue we propose to minimize the CsI(Tl) afterglow to a level where it can be suitably used for many technologically and commercially important applications, without sacrificing its excellent properties. Our approach during Phase II will involve detailed investigation of the scintillation processes in the CsI(T1) and quenching the afterglow by the addition of activators into its lattice. Potential Applications: The CsI(Tl) scintillator is widely used in many commercial products such as digital mammography systems, image intensifier tubes, and numerous other systems for medical and non-medical use. Reduction of afterglow will allow the use of this scintillator in many important imaging modalities such as medical CT, stereo-tactic mammography, and other high-speed imaging as well as counting applications. The use of CsI(Tl) in these systems is expected to substantially enhance their performance with dramatic reduction in cost.

Principal Investigator:

Michael R. Squillante
6176686808
MSQUILLANTE@RMDINC.COM

Business Contact:

Gerald Entine
6179261167
GENTINE@RMDINC.COM
Small Business Information at Submission:

RADIATION MONITORING DEVICES, INC.
RADIATION MONITORING DEVICES INC 44 HUNT ST WATERTOWN, MA 02472

EIN/Tax ID: 042546395
DUNS: N/A
Number of Employees: N/A
Woman-Owned: No
Minority-Owned: No
HUBZone-Owned: No