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Restoration of combined conjugate images in SPECT; Comparison of a new Weiner filter and the image-dependent Metz filter

Conference · · IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA)
OSTI ID:6581430
; ;  [1]
  1. Massachusetts Univ., Worcester, MA (USA). Dept. of Nuclear Medicine
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This study applies two image-dependent restoration filters to projection image sets obtained with single photon emission computed tomography (SPECT). Wiener and Metz restoration of combined conjugate views are compared to: each other, Wiener restoration of individual projection images, and to one-dimensional (1D) Butterworth smoothing. The combined view restoration filters adapt to the average thickness of the object by estimating a modulation transfer function (MTF) for that thickness. Simulated Tc-99m liver-spleen studies with randomly placed cold spot tumors, a projector which accounts for the spatially variant blurring in SPECT, and a Poisson noise generator are used to compute simulated projection image sets.

OSTI ID:
6581430
Report Number(s):
CONF-900143--
Journal Information:
IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA), Journal Name: IEEE Transactions on Nuclear Science (Institute of Electrical and Electronics Engineers); (USA) Vol. 37:2; ISSN 0018-9499; ISSN IETNA
Country of Publication:
United States
Language:
English

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Related Subjects

440100 -- Radiation Instrumentation
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
99 GENERAL AND MISCELLANEOUS
990200 -- Mathematics & Computers
BODY
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
DIAGNOSTIC USES
DIGESTIVE SYSTEM
EMISSION COMPUTED TOMOGRAPHY
FILTERS
GLANDS
IMAGE PROCESSING
LIVER
OPTICAL FILTERS
ORGANS
PROCESSING
SIMULATION
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
SPLEEN
TECHNOLOGY ASSESSMENT
THREE-DIMENSIONAL CALCULATIONS
TOMOGRAPHY
USES