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Proceedings Paper

How Do Videodensitometric Ejection Fractions From Intravenous Digital Subtraction Ventriculograms Compare With First Pass Radionuclide Ejection Fractions? (Technical Aspects)
Author(s): Robert Detrano; William MacIntyre; Raymond MacIntyre; Houston Jones; Susan Withrow; Conrad Simpfendorfer; Ernesto E. Salcedo; Anthony Lando
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Paper Abstract

Three major errors implicit in the determination of ejection fractions from videodensi-tometric analysis of intravenous digital subtraction ventriculograms are errors due to: (1) nonlinear transfer of densitometric information about relative volumes, (2) inadequate background subtraction and (3) overlapping atrial contrast. Nonlinear errors associated with our imaging system were estimated using balloon phantoms in a water bath. These were small for a tube voltage of 90 kV and an iodine concentration of approximately 37 mg/cc commonly used in clinical studies. Background subtraction errors are approached by using phase matched second order mask images temporally close to the contrast images. Atrial overlap errors remain a significant problem. However, videodensitometric ejection frac-tions from intravenous digital studies correlated well with first pass right ventriculo-grams (r = 0.84) and left ventriculograms (r = 0.85).

Paper Details

Date Published: 11 June 1985
PDF: 8 pages
Proc. SPIE 0535, Application of Optical Instrumentation in Medicine XIII, (11 June 1985); doi: 10.1117/12.947285
Show Author Affiliations
Robert Detrano, Cleveland Clinic Foundation (United States)
William MacIntyre, Cleveland Clinic Foundation (United States)
Raymond MacIntyre, Cleveland Clinic Foundation (United States)
Houston Jones, Cleveland Clinic Foundation (United States)
Susan Withrow, Cleveland Clinic Foundation (United States)
Conrad Simpfendorfer, Cleveland Clinic Foundation (United States)
Ernesto E. Salcedo, Cleveland Clinic Foundation (United States)
Anthony Lando, Philips Medical Systems (United States)

Published in SPIE Proceedings Vol. 0535:
Application of Optical Instrumentation in Medicine XIII
Samuel J. Dwyer III; Roger H. Schneider, Editor(s)

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