title: The Walsh-Hadamard transform: an alternative means of obtaining phase and amplitude maps.
abstract: Currently, Fourier analysis is a method for obtaining the phase and amplitude images used to evaluate abnormalities of cardiac contraction. Since this technique is time-consuming, the present work investigates the application of another algorithm used in digital signal processing: the Walsh- Hadamard transform ( WHT ). This method provides a 48% time saving because it requires only elementary algebraic operations. The study presents the results obtained processing 30 blood-pool cardiac acquisitions in various diseases. No significant difference was found in the pairs of maps and in the parameters chosen for comparison of the data.
mesh_terms: D005583:Fourier Analysis; D006321:Heart / Q000000981:diagnostic imaging*; D006352:Heart Ventricles / Q000000981:diagnostic imaging; D006801:Humans; D008433:Mathematics; D008722:Methods; D009200:Myocardial Contraction; D011877:Radionuclide Imaging; D013318:Stroke Volume