Publications (114) View all
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Article: Smart MR ECG sensor for sequence synchronization and patient monitoring
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ABSTRACT: Cardiac magnetic resonance imaging (MRI) has become an essential tool to diagnose several cardiac diseases. This technique is highly dependant on the accuracy of electrocardiogram (ECG) signals and on the sequence synchronization algorithm. Our goal was the development of a smart MR ECG, totally compatible with the MR environment for: (1) robust synchronization of MR sequences, including cases of pathologic ECG, rhythmic disorders, low amplitude ECG for patients who are excluded nowadays and (2) safe and continuous patient monitoring working for all MR examinations with detection of emergency situations. To achieve these objectives, an ECG amplifier and a 3D magnetic field sensor have been developed in microelectronic technology (chip). We have associated motion sensors to acquire respiration displacement during an MRI exam. These sensors give a correct representation of the patient breathing allowing advanced image reconstruction methods. The designed microelectronic circuits are totally non magnetic,IRBM. 01/2011; 32(3):179-184. -
Conference Proceeding: Analysis of the relationship between interictal electrical source imaging and PET hypometabolism
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ABSTRACT: The aim of this paper is to compare interictal EEG source localizations with statistical analysis of hypometabolisms in PET brain imaging. Both methods are currently used in the pre-surgical evaluation of drug-resistant partial epilepsy, but the relationship between electrical source localizations and hypometabolic areas has not been well defined yet. At the present time, these two methods have been performed on five patients in order to develop a comparative quantitative study with these first results which should be then extended to a larger patient database.Engineering in Medicine and Biology Society (EMBC), 2010 Annual International Conference of the IEEE; 10/2010 -
Article: Analysis of the relationship between interictal electrical source imaging and PET hypometabolism.
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ABSTRACT: The aim of this paper is to compare interictal EEG source localizations with statistical analysis of hypometabolisms in PET brain imaging. Both methods are currently used in the pre-surgical evaluation of drug-resistant partial epilepsy, but the relationship between electrical source localizations and hypometabolic areas has not been well defined yet. At the present time, these two methods have been performed on five patients in order to develop a comparative quantitative study with these first results which should be then extended to a larger patient database.Conference proceedings: ... Annual International Conference of the IEEE Engineering in Medicine and Biology Society. IEEE Engineering in Medicine and Biology Society. Conference 01/2010; 2010:3723-6. -
Article: [Cardiac MRI: technical considerations].
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ABSTRACT: Establishing a clinical cardiovascular magnetic resonance imaging (MRI) program needs a dedicated technical surroundings as well as a specific and expert staff. These guidelines based either on proofs or on expert consensus are stated in order to help the physicians to reach or maintain the competence required for clinical use of cardiovascular MRI. After the general safety statements, the guidelines are focused on hardware and software requirements, the MRI sequences and views, the post-acquisition analysis, and the staff. Specific safety concerns are then approached, more particularly stress testing MRI.Journal de Radiologie 09/2009; 90(9 Pt 2):1133-43. · 0.42 Impact Factor -
Article: Combined SEEG and source localisation study of temporal lobe schizencephaly and polymicrogyria.
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ABSTRACT: Type 1 schizencephaly (SZ) is a cerebral malformation characterised by a cleft lined and surrounded by a polymicrogyric cortex, extending from the pial region to the peri-ventricular heterotopia. Our purpose was to combine and compare dipole source imaging technique and Stereo-EEG (SEEG) technique in determining the irritative and epileptogenic zones in a case of type 1 schizencephaly. High-resolution (64-channel) video-EEG with electrical source imaging and SEEG recordings were performed during a pre-surgical evaluation for medically intractable epilepsy. Anatomo-electro-clinical correlations based on SEEG and source localisation identified two irritative and epileptogenic zones partially overlapping the polymicrogyric cortex surrounding the SZ: an anterior medio-lateral network primarily involving dysplasic limbic structures and a lateral network involving the anterior and middle part of the cleft and polymicrogyric cortex. The most posterior part (at the temporo-parieto-occipital junction) displayed a normal background activity. Both epileptogenic and electrophysiologically normal cortices coexisted within the same widespread malformation: only the anterior part belonged to the anterior medio-lateral epileptogenic network defined by the SEEG. In cases of widespread cortical malformation such as SZ, source localization techniques can help to define the irritative zone and relevant targets for SEEG.Clinical neurophysiology: official journal of the International Federation of Clinical Neurophysiology 08/2009; 120(9):1628-36. · 3.12 Impact Factor
