Improved interpretation of gated cardiac images by use of digital filters

Conference · Sat Sep 01 00:00:00 EDT 1984 · Radiology; (United States)

OSTI ID:6385767

Miller, T R; Goldman, K J; Epstein, D M; Biello, D R; Sampathkumaran, K S; Kumar, B; Siegel, B A

The authors describe a digital filter that greatly enhances the quality of gated cardiac blood-pool images. Spatial filtering is accomplished with a minimum-mean-square-error (Wiener) filter incorporating measured camera blur and Poisson noise statistics. A low-pass temporal filter is then applied to each pixel, with the cutoff frequency determined from measurements of frequency spectra in 20 patients. This filter was evaluated in routine clinical use for nearly one year and found to significantly improve chamber definition, delineate wall motion abnormalities better, and reduce noise. To quantitatively assess the effect of the filter on image interpretation, four experienced observers evaluated wall motion in a series of mathematically simulated left ventricular images. ROC analysis revealed that accuracy in assessing wall motion was significantly greater with the filtered images.

• Research Organization: Washington Univ. School of Medicine, St. Louis, MO
• OSTI ID: 6385767
• Report Number(s): CONF-8311191-
• Journal Information: Radiology; (United States), Vol. 152:3; Conference: 69. annual meeting of the Radiological Society of North America, Chicago, IL, USA, 13 Nov 1983
• Country of Publication: United States
• Language: English

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62 RADIOLOGY AND NUCLEAR MEDICINE
BLOOD FLOW
EVALUATION
DIGITAL FILTERS
DYNAMIC FUNCTION STUDIES
HEART
SCINTISCANNING
TECHNETIUM 99
ERYTHROCYTES
ISOMERIC NUCLEI
BETA DECAY RADIOISOTOPES
BETA-MINUS DECAY RADIOISOTOPES
BIOLOGICAL MATERIALS
BLOOD
BLOOD CELLS
BODY
BODY FLUIDS
CARDIOVASCULAR SYSTEM
COUNTING TECHNIQUES
DIAGNOSTIC TECHNIQUES
HOURS LIVING RADIOISOTOPES
INTERMEDIATE MASS NUCLEI
ISOMERIC TRANSITION ISOTOPES
ISOTOPES
MATERIALS
NUCLEI
ODD-EVEN NUCLEI
ORGANS
RADIOISOTOPE SCANNING
RADIOISOTOPES
TECHNETIUM ISOTOPES
YEARS LIVING RADIOISOTOPES
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