Annie Delouche

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Acceleration mapping can be conducted by replacing the bipolar gradient pulse of a velocity mapping sequence by a tripolar pulse. However, since the acceleration encoding pulse is longer, the image quality is altered by the requirement of a long echo time. Since Fourier encoding velocity imaging has been shown to be robust, this velocity mapping method was(More)
An automated method was developed in echocardio-graphy for defining regional wall motion score (RWMS) using a 4 point scale. Eighty-six time image sequences were analyzed. The left ventricle was divided into 7 segments and the reference RWMS was given by experts. The image sequences were processed by Factor Analysis of the Left Ventricle in Echocardiography(More)
A new automatic regional wall motion scoring approach based on parametric imaging was provided. Black and white (B/W) echocardiography sequences were summarized into amplitude and time parametric images using the parametric analysis of main motion (PAMM) with new constraints on the transition times between muscle and cavity. Then segmental wall motion(More)
An image database of echocardiograms, EVALECHOCARD, dedicated to regional wall motion scoring is presented. It is devoted to become a public reference database, in order to develop an objective comparison on the same data of different computer vision packages aiming at scoring the regional wall motion. The database construction is described, including the(More)
A method for estimating pressure gradients from MR images is demonstrated. Making the usual assumption that the flowing medium is a Newtonian fluid, and with appropriate boundary conditions, the inertial forces (or acceleration components of the flow) are proportional to the pressure gradients. The technique shown here is based on an evaluation of the(More)
The aim of this paper is to develop an automated method which operates on echocardiographic dynamic loops for classifying the left ventricular regional wall motion (RWM) in a four-point scale. A non-selected group of 37 patients (2 and 4 chamber views) was studied. Each view was segmented according to the standardized segmentation using three manually(More)
BACKGROUND Analysis of left ventricular (LV) regional wall motion (RWM) is subjective and may be challenging in patients with suboptimal images, even with contrast enhancement. It was hypothesized that the amplitude and timing of RWM obtained from contrast-enhanced echocardiograms can be accurately represented in still-frame parametric images. This study(More)
The objective of this paper is to propose a framework in order to make the comparison of image processing algorithms effective. This framework was applied to three methods developed for automated regional wall motion scoring and they were compared to a reference scoring on a database of echocardiographic images (Evalechocard). Firstly, 200 annotated(More)
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