Automatic generation of noise-free time-activity curve with gated blood-pool emission tomography using deformation of a reference curve.
This paper describes a new method for assessing clinical parameters from a noisy regional time-activity curve (TAC) in tomographic gated blood-pool ventriculography. This method is based on a priori knowledge on the shape of a TAC, and shape approximation. The rejection method was used to generate different random Poisson deviates, covering standard count levels, of six representative TACs in order to test and compare the proposed method with harmonic and multiharmonic reconstruction methods. These methods were compared by evaluating four clinical parameters: time of end systole, amplitude, peak ejection and filling rates. Overall, the accuracy of assessment of these parameters was found to be better with the method described in this paper than with standard multiharmonic fits.
Caderas de Kerleau
Charles
C
Montpellier Medical University, Biophysics and Nuclear Medicine Department, Service de médecine nucléaire, CHU Lapeyronie, Montpellier 34295, 5 France.
Crouzet
Jean-Francois
JF
Ahronovitz
Ehoud
E
Rossi
Michel
M
Mariano-Goulart
Denis
D
D000465:Algorithms; D003198:Computer Simulation; D005103:Expert Systems; D015637:Gated Blood-Pool Imaging / Q000379:methods*; D006352:Heart Ventricles / Q000000981:diagnostic imaging* / Q000378:metabolism; D006801:Humans; D007089:Image Enhancement / Q000379:methods*; D007090:Image Interpretation, Computer-Assisted / Q000379:methods*; D008657:Metabolic Clearance Rate; D008954:Models, Biological; D011865:Radioisotope Dilution Technique; D019275:Radiopharmaceuticals / Q000493:pharmacokinetics; D012016:Reference Values; D013269:Stochastic Processes; D013382:Subtraction Technique
D019275:Radiopharmaceuticals