Application of matched filtering to contrast material dose reduction in digital subtraction angiography

Journal Article · Wed Jun 01 04:00:00 EDT 1983 · Radiology; (United States)

DOI:https://doi.org/10.1148/radiology.147.3.6342035· OSTI ID:5246383

Riederer, S J ^[1]; Enzmann, D R; Brody, W R; Hall, A L

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1. Stanford Univ. School of Medicine, CA

Temporal filtering methods were applied to a 50% reduction of contrast material dose in intravenous digital subtraction angiography (DSA). The performance of matched filtering was reviewed, indicating a 50% reduction of noise through the integration of an entire (>10 sec) DSA image sequence spanning the contrast material bolus arrival and washout. Used in conjunction with 50% contrast material dose reduction, matched filtering could provide iodine signal-to-noise ratios (SNR) comparable to those of conventional DSA. Half-contrast-material-dose (20 ml) filtered DSA runs were compared with full-contrast-material-dose (40 ml) unfiltered runs for 5 carotid, 2 cerebral, and 4 peripheral studies. In all but 2 studies, the half-contrast-material-dose runs were judged to be diagnostic. In all 4 peripheral studies and in some of the 7 carotid and cerebral studies the 20-ml results were judged to be equivalent to the 40-ml results. It is concluded that the half-contrast material-dose temporally filtered approach is appropriate for peripheral runoff studies. Matched filtering was experimentally compared with simple integrated remasking. If the identical image sequence was used for each, the two had virtually identical performance for integration times less than 10 sec, consistent with theoretical predictions. Two other applications of matched filtering, SNR enhancement and x-ray exposure reduction, are discussed schematically.

• OSTI ID: 5246383
• Journal Information: Radiology; (United States), Journal Name: Radiology; (United States) Vol. 147:3; ISSN RADLA
• Country of Publication: United States
• Language: English

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46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
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62 RADIOLOGY AND NUCLEAR MEDICINE
BIOMEDICAL RADIOGRAPHY
BLOOD VESSELS
BODY
BRAIN
CARDIOVASCULAR SYSTEM
CENTRAL NERVOUS SYSTEM
CONTRAST MEDIA
DIAGNOSTIC TECHNIQUES
DIGITAL FILTERS
ELEMENTS
HALOGENS
IMAGE PROCESSING
IMAGES
IODINE
MEDICINE
NERVOUS SYSTEM
NONMETALS
NUCLEAR MEDICINE
ORGANS
PATIENTS
PROCESSING
RADIOLOGY
SIGNAL-TO-NOISE RATIO
TIME DEPENDENCE