PT - JOURNAL ARTICLE AU - Wynant, Gordon E. TI - Radionuclide First Transit and R-Wave Synchronized Imaging: Correlation of Three Methods of Determining Left Ventricular Ejection Fraction with Contrast Angiography DP - 1980 Sep 01 TA - Journal of Nuclear Medicine Technology PG - 155--157 VI - 8 IP - 3 4099 - http://tech.snmjournals.org/content/8/3/155.short 4100 - http://tech.snmjournals.org/content/8/3/155.full SO - J. Nucl. Med. Technol.1980 Sep 01; 8 AB - Left ventricular ejection fractions in 25 patients, as determined by first transit and R-wave synchronized imaging, were compared with contrast angiography. The ejection fraction obtained by first transit and R-wave synchronized images using a varying region of interest correlated well with the contrast angiography (r=0.96; r=0.99 respectively). Use of a fixed end-diastolic region of interest consistently underestimated the ejection fraction (r=0.92).