How Do Videodensitometric Ejection Fractions From Intravenous Digital Subtraction Ventriculograms Compare With First Pass Radionuclide Ejection Fractions? (Technical Aspects)

Robert Detrano; William MacIntyre; Raymond MacIntyre; Houston Jones; Susan Withrow; Conrad Simpfendorfer; Ernesto E. Salcedo; Anthony Lando

doi:10.1117/12.947285

11 June 1985 How Do Videodensitometric Ejection Fractions From Intravenous Digital Subtraction Ventriculograms Compare With First Pass Radionuclide Ejection Fractions? (Technical Aspects)

Robert Detrano, William MacIntyre, Raymond MacIntyre, Houston Jones, Susan Withrow, Conrad Simpfendorfer, Ernesto E. Salcedo, Anthony Lando

Author Affiliations +

Proceedings Volume 0535, Application of Optical Instrumentation in Medicine XIII; (1985) https://doi.org/10.1117/12.947285
Event: 1985 Medical Imaging Conferences, 1985, California, United States

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).

Citation Download Citation

Robert Detrano, William MacIntyre, Raymond MacIntyre, Houston Jones, Susan Withrow, Conrad Simpfendorfer, Ernesto E. Salcedo, and Anthony Lando "How Do Videodensitometric Ejection Fractions From Intravenous Digital Subtraction Ventriculograms Compare With First Pass Radionuclide Ejection Fractions? (Technical Aspects)", Proc. SPIE 0535, Application of Optical Instrumentation in Medicine XIII, (11 June 1985); https://doi.org/10.1117/12.947285

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