Monte Carlo simulation code for SPECT imaging of uniform and nonuniform media and source distributions

Conference · Tue Dec 31 00:00:00 EST 1991

OSTI ID:10114146

Ivanovic, M; Weber, D A

Monte Carlo simulations of SPECT images are used to analyze the influence of scatter on SPECT imaging and to evaluate the accuracy of reconstruction algorithms. We adapted EGS4 simulation code for use with SPECT geometries consisting of uniform and nonuniform distributions of water, lung and bone tissue. The EGS4 code is a very flexible and well documented code which allows the user to simulate electron and photon showers in any material. However, the user must write subroutines to specify source distribution, object and detector geometry, and scoring routine for quantities of interest. Since many of the physical parameters for the detector and imaging geometry cannot be exactly determined, and to make Monte Carlo simulations efficient, some approximations are included included in developed code. The validation of developed code for simulations of SPECT acquisition are based on qualitative and quantitative comparisons of (1) scatter fraction (SF), (2) line spread functions (LSF), and (3) energy spectra of experimentally obtained and simulated data. This validation method is a standard approach of simulation validation for photon transport in scintillation camera imaging.

• Research Organization: Brookhaven National Lab., Upton, NY (United States)
• Sponsoring Organization: USDOE, Washington, DC (United States)
• DOE Contract Number: AC02-76CH00016
• OSTI ID: 10114146
• Report Number(s): BNL-46801; CONF-9109176-2; ON: DE92005381
• Resource Relation: Conference: Annual congress of the European Association of Nuclear Medicine,Vienna (Austria),1-5 Sep 1991; Other Information: PBD: [1991]
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
TISSUES
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
MONTE CARLO METHOD
IMAGE PROCESSING
COMPUTERIZED SIMULATION
SCATTERING
TECHNETIUM 99
ENERGY SPECTRA
PHOTON TRANSPORT
DISTRIBUTION FUNCTIONS
550602
440101
EXTERNAL RADIATION IN DIAGNOSTICS
GENERAL DETECTORS OR MONITORS AND RADIOMETRIC INSTRUMENTS