Work in progress: the application of temporal filtering techniques to hybrid subtraction in digital subtraction angiography

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

DOI:https://doi.org/10.1148/radiology.147.3.6342036· OSTI ID:5177941

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

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1. Stanford Univ. School of Medicine, CA

Temporal filtering methods were applied to iodine signal-to-noise ratio (SNR) restoration in intravenous hybrid subtraction digital subtraction angiography (DSA). For equal detected exposure rates hybrid subtraction had approximately 35% of the SNR of temporal subtraction. When matched filtering was applied to a DSA run, the filtered result had approximately two times higher SNR than the peak contrast image in the run. Thus, when matched filtering techniques were applied to the hybrid image sequence, the resulant SNR increased to about 70% of that of temporal subtraction. With an additional factor-of-two increase in exposure rate for the hybrid run, SNR parity with temporal subtraction could be achieved. This compared with a factor-of-nine increase in exposure that would be required if no filtering were performed. Experimental hybrid matched filter results, generated with intravenous canine DSA studies, supported the predictions in SNR performance.

• OSTI ID: 5177941
• Journal Information: Radiology; (United States), Journal Name: Radiology; (United States) Vol. 147:3; ISSN RADLA
• Country of Publication: United States
• Language: English

Related Subjects

550602* -- Medicine-- External Radiation in Diagnostics-- (1980-)
62 RADIOLOGY AND NUCLEAR MEDICINE
ANIMALS
BIOMEDICAL RADIOGRAPHY
BLOOD VESSELS
BODY
CARDIOVASCULAR SYSTEM
DIAGNOSTIC TECHNIQUES
DIAGNOSTIC USES
DIGITAL FILTERS
DOGS
DOSE RATES
ELEMENTS
HALOGENS
IMAGE PROCESSING
IODINE
MAMMALS
MEDICINE
NONMETALS
NUCLEAR MEDICINE
ORGANS
PATIENTS
PROCESSING
RADIOLOGY
SIGNAL-TO-NOISE RATIO
TIME DEPENDENCE
USES
VERTEBRATES