Philip Vignon

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Acute traumatic lesions of the thoracic aorta or its branches (TLA) constitute highly lethal yet treatable injuries that are increasingly diagnosed in surviving patients. Traumatic disruptions are limited to the region of the aortic isthmus in approximately 90% of cases. Unlike aortography, usually referred as the gold standard diagnostic technique,(More)
Quantitative evaluation of right ventricular (RV) function remains challenging due to the complex geometry of this chamber, which precludes the use of simple geometric assumptions. Automated border detection (ABD) techniques, which provide online changes in cardiac chamber dimensions, have been predominantly used for quantitative assessment of global as(More)
Color Kinesis/sup TM/ (CK) is a new real-time echocardiographic technique based on tissue characterization, which uses frame-by-frame color encoding of pixel transitions from blood to myocardial tissue throughout systole to display endocardial motion in a single end-systolic frame. The authors developed user-friendly software for on-line segmental analysis(More)
A technique for measuring average velocity in the inferior vena cava (IVC) by using phase-display magnetic resonance (MR) imaging is described. Fifteen healthy subjects were imaged, and the velocities and spectra obtained by MR were compared with pulsed Doppler results. Distortions of the "zebra-striped" images obtained along the axis of the vessel were(More)
An M mode echocardiographic study was performed, of left ventricular dimensions and wall thickness in two series of normal (N1, N2) and pathological (P1, P2) subjects. In the more recent series (N2 = 40, P2 = 17) data acquisition was facilitated by tests deduced from the technique of ultrasound transit time. The parameters compared were based on: 1) the(More)
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