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

Journal Article · Wed Jun 01 00:00:00 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), Vol. 147:3
• Country of Publication: United States
• Language: English

Related Subjects

62 RADIOLOGY AND NUCLEAR MEDICINE
46 INSTRUMENTATION RELATED TO NUCLEAR SCIENCE AND TECHNOLOGY
BIOMEDICAL RADIOGRAPHY
IMAGE PROCESSING
BLOOD VESSELS
BRAIN
CONTRAST MEDIA
DIGITAL FILTERS
IMAGES
IODINE
PATIENTS
SIGNAL-TO-NOISE RATIO
TIME DEPENDENCE
BODY
CARDIOVASCULAR SYSTEM
CENTRAL NERVOUS SYSTEM
DIAGNOSTIC TECHNIQUES
ELEMENTS
HALOGENS
MEDICINE
NERVOUS SYSTEM
NONMETALS
NUCLEAR MEDICINE
ORGANS
PROCESSING
RADIOLOGY
550602* - Medicine- External Radiation in Diagnostics- (1980-)
440100 - Radiation Instrumentation