Skip to main content
OSTI.GOVU.S. Department of Energy Office of Scientific and Technical Information
U.S. Department of Energy
Office of Scientific and Technical Information
 

A new multi-crystal two dimensional detector block for PET

Conference · · J. Nucl. Med.; (United States)
OSTI ID:7031539
; ; ; ;
The basic characteristics of a new high performance, low cost, modular detector ''block'' for PET is presented. The block is a key component in an advanced high resolution and high countrate PET scanner. Each detector block contains an array of four by eight Bismuth Germanate (BGO) crystals with dimension of 6 mm x 12 mm x 30 mm. The crystals are coupled to four photomultipliers by means of a specially coded light guide which provides optimum position resolution. Position, timing and energy resolution are measured and compared with theoretical models. In-plane resolution (line spread function) of 4.6 mm (FWHM) was obtained with the 6 mm wide BGO detectors. It is demonstrated that the accuracy of positioning is greater than 90 percent for all 32 crystals in the block. The effect of Compton scattering between crystals is also measured. Timing resolution between two blocks of detectors is demonstrated to be typically 10 nsec (FWTM) which allows the scanner coincidence time window to be 12 nsec. Typical measured energy resolution for the block detector is 22 percent (FWHM) and the photopeak to Compton is greatly improved over that of individual crystals. Scanner cost using the block detector is anticipated to be 35 to 45 percent less than the cost of conventional scanners.
Research Organization:
Computer Technology and Imaging, Inc., Knoxville, TN
OSTI ID:
7031539
Report Number(s):
CONF-850611-
Conference Information:
Journal Name: J. Nucl. Med.; (United States) Journal Volume: 26:5
Country of Publication:
United States
Language:
English

Similar Records

A compact position-sensitive detector for PET
Journal Article · Tue Aug 01 00:00:00 EDT 1995 · IEEE Transactions on Nuclear Science · OSTI ID:148053
Evaluation of cerium activated gadolinium orthosilicate (GSO) as a detector for PET
Conference · Sat Dec 31 23:00:00 EST 1983 · J. Nucl. Med.; (United States) · OSTI ID:6843535
High resolution block detectors for PET
Conference · Sat Mar 31 23:00:00 EST 1990 · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA) · OSTI ID:6606784

Related Subjects

440101 -- Radiation Instrumentation-- General Detectors or Monitors & Radiometric Instruments
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BASIC INTERACTIONS
COMPTON EFFECT
COMPUTERIZED TOMOGRAPHY
COST
DESIGN
DIAGNOSTIC TECHNIQUES
ELASTIC SCATTERING
ELECTROMAGNETIC INTERACTIONS
EMISSION COMPUTED TOMOGRAPHY
IMAGE SCANNERS
INTERACTIONS
MEASURING INSTRUMENTS
OPTIMIZATION
PERFORMANCE
PERFORMANCE TESTING
POSITRON COMPUTED TOMOGRAPHY
RADIATION DETECTORS
RESOLUTION
SCATTERING
SEMICONDUCTOR DETECTORS
TESTING
TOMOGRAPHY