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

S. J. Riederer, W. R. Brody, D. R. Enzmann, A. L. Hall, J. K. Maier

Research output: Contribution to journalArticle

8 Scopus citations

Abstract

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 resultant 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.

Original languageEnglish (US)
Pages (from-to)859-862
Number of pages4
JournalUnknown Journal
Volume147
Issue number3
DOIs
StatePublished - Jan 1 1983

ASJC Scopus subject areas

  • Radiology Nuclear Medicine and imaging

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