Open AccessQuantitative Radionuclide Angiocardiography
Author(s) -
David L. Maltz,
S. Ted Treves
Publication year - 1973
Publication title -
circulation
Language(s) - English
Resource type - Journals
SCImago Journal Rank - 7.795
H-Index - 607
eISSN - 1524-4539
pISSN - 0009-7322
DOI - 10.1161/01.cir.47.5.1049
Subject(s) - angiocardiography , medicine , nuclear medicine , radionuclide , radionuclide imaging , histogram , radiology , cardiology , artificial intelligence , quantum mechanics , image (mathematics) , computer science , physics
A new method of determining pulmonary-to-systemic flow ratios (Qp/Qs) in patients with left-to-right shunts using radionuclide angiocardiography is described. It involves the analysis of pulmonary time-activity histograms using a gamma-variate model. It appears to be simple, relatively atraumatic, and superior to the methods using C2/C1 ratios because, in addition to accurately detecting the presence of left-to-right shunts, it permits precise quantitation. In the 35 patients studied, it was found that Qp/Qs <1.2 could be separated from Qp/Qs > 1.2 and that when the Qp/Qs is between 1.2 and <3 the shunts could be accurately quantified.
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