Showing papers on "Parametric Image published in 1994"
01 Jan 1994
TL;DR: Several types of parametric images have been proposed from equilibrium ventriculography in an attempt to break up the complexity of the cardiac cycle into its several components and to display them to the clinician in a more accessible format as discussed by the authors.
Abstract: Several types of parametric images have been proposed from equilibrium ventriculography in an attempt to break up the complexity of the cardiac cycle into its several components and to display them to the clinician in a more accessible format. Even if, following this approach, each component can be separately analysed, the clinical evaluation should be global and should take into consideration the clinical condition of the patient. Of all these types of images, amplitude and phase images derived from the adjustment to the first Fourier’s harmonic are certainly those that are used the most in everyday practice. As such, they will receive preferential treatment here.
3 citations
03 Nov 1994
TL;DR: The aim of this work is to propose an efficient algorithm, based on Newton-Raphson principle, which reduces calculation time by three in comparison with the traditional Newton- Raphson one.
Abstract: The calculation of accurate T1 parametric image is performed by collecting a series of spin-echo images with different T1 weightings (variable repetition times) This relaxation time must be estimated by non-linear fitting for each pixel The aim of this work is to propose an efficient algorithm, based on Newton-Raphson principle, which reduces calculation time by three in comparison with the traditional Newton-Raphson one >