[Evaluation of 3 calculation methods to compute the PER, PFR, TPER, TPFR with equilibrium radioisotopic angiocardiography].
The author wanted to test 3 FITS to compute the peak ejection rate, the time of the peak ejection rate, the peak filling rate, the time of the peak filling rate from the left ventricle volume curve computed by means of the multigated radio nuclide angiography; the aim of the test was to ascertain the differences between the 3 methods and the differences between them for medical applications. 25 patients were tested and they were divided as follows: 5 cases of hypertension, 2 cases of obesity, 9 cases of alimentary diabetes, 3 cases of coronary heart disease, 6 cases with other diseases. The investigated FITS were: 1) the FIT that computes the derivative curve of the volume curve; 2) the FIT that computes the derivative equation of the volume curve and that interpolates it to a polynomial; 3) the FIT of Fourier. A discriminant analysis was performed and the following observations were made: according to a significant probability P < 0.05, FIT 1 classified 40% of the cases, FIT 2 classified 48% of the cases, FIT 3 classified 64% of the cases. A Box's M test was performed and was significant for FIT 3 and FIT 2 but not for FIT 1. In conclusion the test of the 3 FITS showed that FIT 3 is a better discriminant between the diverse diseases.
Indovina
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Istituto di Clinica Medica, Università degli Studi di Palermo.
D015637:Gated Blood-Pool Imaging / Q000379:methods* / Q000706:statistics & numerical data; D006801:Humans; D008433:Mathematics; D012680:Sensitivity and Specificity; D013318:Stroke Volume
Valutazione di tre metodi di calcolo per computare PER, PFR, TPER, TPFR con l'angiocardiografia radioisotopica all'equilibrio.