Absolute left ventricular volume by an iterative build-up factor analysis of gated radionuclide images
| Autor: | L S Malmud, Barry S. Denenberg, R K Wu, K M Blasius, James F. Spann, Blase A. Carabello, Arnold K. Gash, Jeffry A. Siegel, Alan H. Maurer |
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| Rok vydání: | 1984 |
| Předmět: |
Adult
Male Heart Diseases Iterative method Systole Cardiac Volume Diastole Coronary Angiography Isotopes of technetium Technetium-99 Methods Medicine Humans Radiology Nuclear Medicine and imaging Radionuclide Imaging Aged Radionuclide business.industry Heart Middle Aged Mockup Female Nuclear medicine business |
| Zdroj: | Radiology. 151(2) |
| ISSN: | 0033-8419 |
| Popis: | A method for determining absolute left ventricular (LV) volumes from radionuclide gated blood-pool (GBP) images was validated in 34 patients. The technique is nongeometric, corrects for tissue attenuation, and uses an experimentally determined set of build-up factors to account for the effects of scatter. Only four parameters are needed to determine LV volumes: the LV count rates from a left anterior oblique (LAO) and a right posterior oblique (RPO) image (180 degrees opposed to the LAO), a venous blood sample, and a patient thickness measurement. A computer algorithm is used to reach an iterative solution to two simultaneous equations that yield LV volumes. Phantom studies showed less than 4% error for volume determinations at all investigated depths. For the patients studied the correlation between volumes obtained by GBP and contrast ventriculography was 0.97 for diastole and 0.96 for systole. |
| Databáze: | OpenAIRE |
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