Two-dimensional filtering of SPECT images using the Metz and Wiener filters

Journal Article · Wed Oct 31 23:00:00 EST 1984 · J. Nucl. Med.; (United States)

OSTI ID:6153507

King, M A; Schwinger, R B; Doherty, P W; Penney, B C

Two-dimensional filtering, both before and after reconstruction, has been applied to the processing of single photon emission computerized tomographic (SPECT) images. The filters investigated were the count-dependent Metz filter and Wiener filter, both of which automatically adapt to the image being processed. Using a SPECT phantom, with images reconstructed with these filters rather than the ramp, the authors observed a statistically signficant increase in the image contrast for solid Plexiglas spheres, and significant decrease in the percent fractional standard deviation of counts in a region of uniform activity. The adaptability of these filters is demonstrated by a comparison of SPECT acquisition of the phantom at two different count levels. An example of the application to clinical studies is presented. Two-dimensional digital image restoration with these techniques can produce a significant increase in SPECT image quality, with a small cost in processing time when these techniques are implemented on an array processor.

• Research Organization: Univ. of Massachusetts Medical Center, Worcester
• OSTI ID: 6153507
• Journal Information: J. Nucl. Med.; (United States), Journal Name: J. Nucl. Med.; (United States) Vol. 25:11; ISSN JNMEA
• Country of Publication: United States
• Language: English

Related Subjects

550601* -- Medicine-- Unsealed Radionuclides in Diagnostics
62 RADIOLOGY AND NUCLEAR MEDICINE
BODY
CARDIOVASCULAR SYSTEM
COMPUTERIZED TOMOGRAPHY
DIAGNOSTIC TECHNIQUES
DIGESTIVE SYSTEM
DIGITAL FILTERS
EMISSION COMPUTED TOMOGRAPHY
EVALUATION
FOURIER TRANSFORMATION
GLANDS
HEART
IMAGE PROCESSING
IMAGES
INTEGRAL TRANSFORMATIONS
LIVER
MOCKUP
ORGANS
PHANTOMS
PROCESSING
SINGLE PHOTON EMISSION COMPUTED TOMOGRAPHY
SKELETON
STRUCTURAL MODELS
TOMOGRAPHY
TRANSFORMATIONS
VERTEBRAE