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Parametric Image

About: Parametric Image is a research topic. Over the lifetime, 311 publications have been published within this topic receiving 6095 citations.


Papers
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Journal ArticleDOI
TL;DR: An experiment of type 2 parametric image amplification in a phase sensitive configuration and the parametric gain corresponds to amplification or deamplification, depending on the relative phase of the input image with respect to the pump wave and on the spatial frequencies of theinput image.
Abstract: We report an experiment of type 2 parametric image amplification in a phase sensitive configuration. In the spatial frequency domain, the parametric gain corresponds to amplification or deamplification, depending on the relative phase of the input image with respect to the pump wave and on the spatial frequencies of the input image.

12 citations

Journal ArticleDOI
TL;DR: An existing technique for the presentation of oesophageal transit studies has been further developed and applied to conventional radionuclide data, resulting in a parametric image that is particularly useful for depicting the complex motion of a fragmented bolus.
Abstract: An existing technique for the presentation of oesophageal transit studies has been further developed and applied to conventional radionuclide data. The spatial and temporal information contained in the original dynamic study is compressed to a single image, showing the linear distribution of activity down the oesophagus throughout the study. This parametric image contains all the useful information concerning the motion of the bolus, and is particularly useful for depicting the complex motion of a fragmented bolus. The technique has been shown to be of value in patients with a variety of oesophageal disorders.

12 citations

Journal ArticleDOI
TL;DR: This paper improves both the convergence range and rate using a second order Taylor expansion and shows first order methods to be a degenerate case of the proposed scheme, and extends the scheme using a symmetrical formulation which further improves the convergence properties.

12 citations

Book ChapterDOI
12 Oct 2008
TL;DR: A generic bi-directional framework is proposed for parametric image alignment, that extends the classification of [1].
Abstract: In this paper, a generic bi-directional framework is proposed for parametric image alignment, that extends the classification of [1]. Four main categories (Forward, Inverse, Dependent and Bi-directional) form the basis of a consistent set of subclasses, onto which state-of-the-art methods have been mapped. New formulations for the ESM [2] and the Inverse Additive [3] algorithms are proposed, that show the ability of this framework to unify existing approaches. New explicit equivalence relationships are given for the case of first-order optimization that provide some insights into the choice of an update rule in iterative algorithms.

11 citations

Journal ArticleDOI
TL;DR: An automated method is presented in which the effects of overlap of left and right sided chambers or vessels are minimized by the automatic elimination of regions which have two distinct peak concentration times, one preceding the pulmonary phase of the study, and the other one following it.
Abstract: An automated method is presented in which regions of interest are selected on the basis of peak concentration times and in which the effects of overlap of left and right sided chambers or vessels are minimized by the automatic elimination of regions which have two distinct peak concentration times, one preceding the pulmonary phase of the study, and the other one following it. As part of the permanent record a set of parametric images is produced in which the progression of the bolus is represented in a pseudo gray scale with later times represented by darker shades. One of the parametric images documents the choice of the regions of interest, from each of which a time-activity curve is automatically generated. Besides providing the basis for these curves, the parametric images often help to clarify the nature of complex cardiac anomalies. Additional significant advantages of the method are minimal operator interaction and bias, and speed of analysis and presentation.

11 citations


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Performance
Metrics
No. of papers in the topic in previous years
YearPapers
20217
202013
201911
20186
201713
201613