Miniaturization of Microwave Biosensor for Non-invasive Measurements of Materials and Biological Tissues

Non-invasive planar complementary split ring resonators (CSRRs) coupled to microstrip line for measuring the dielectric properties of materials and biological tissues are presented in this paper. The expectations of health professionals are increasingly turning to less invasive surgical procedures and treatments. In particular, the monitoring of vital parameters (sweat, water in the lungs, etc.) or the evolution of certain pathologies, such as cancer cells, could be observed regularly if suitable devices were developed and could especially replace traditional invasive method. Appropriate miniaturized RF or microwave devices could be an alternative for some medical diagnostic applications. These devices would make it possible to determine the dielectric characteristics of biological tissues, which represent their real pathological states. It would thus be possible, by means of dielectric contrast measurements, to follow the evolution of pathology as well as the vital parameters of a patient. The objective of this research is to produce a prototype biosensor that is suitable for measurements on biological tissues and that can be miniaturized to enhance its spatial sensitivity. This work focuses on the design, electromagnetic simulations and characterization of a new miniaturized biosensors operating between 1 and 10 GHz. The ex-vivo experimental results will be shown by measuring the S-parameters of various materials and animal biological tissues. The extraction of the dielectric parameters of these samples is obtained by the measurements of material

Infection arterielle après endartériectomie carotidienne : A propos de huit cas

LE KREMLIN-B.- PARIS 11-BU Méd (940432101) / SudocSudocFranceF

Traitement chirurgical des chémodectomes de la bifurcation carotidienne (intérêt du sacrifice carotide externe)

Les chémodectomes de la bifurcation carotidienne sont une pathologie rare. Nous rapportons ici l expérience de la Pitié Salpêtrière où une exérèse maximaliste et le sacrifice de la carotide externe sont privilégiés. Le potentiel évolutif est essentiellement local et la chirurgie source de séquelle neurologique dans 30% des cas. A notre sens l embolisation préopératoire est inutile et parfois dangereuse par migration intracérébrale. La radiothérapie n a pas de place dans le traitement curatif de ces tumeurs le plus souvent bénigneCarotid body tumors are a rare neoplasm. We report here the experiment of the hospital La Pitié Salpêtrière where a maximalist excision and sacrifice of the external carotid artery are favoured. The evolutive course is essentially local and surgery source of neurological sequelae in 30% cases. We consider that preoperative embolization is useless and possibly dangerous with intracerebral migration of glue. Radiotherapy cannot be proposed in a curative way for these tumors that are oftenly benignPARIS12-CRETEIL BU Médecine (940282101) / SudocPARIS-BIUM (751062103) / SudocSudocFranceF

Préservation néphronique par revascularisation combinée des artères rénales et de l'aorte abdominale

LE KREMLIN-B.- PARIS 11-BU Méd (940432101) / SudocSudocFranceF

Words and morphisms with Sturmian erasures

International audienceWe say x \in \{ 0,1,2 \}^{\NN} is a word with Sturmian erasures if for any $a\in \{ 0,1,2 \}$ the word obtained erasing all $a$ in $x$ is a Sturmian word. A large family of such words is given coding trajectories of balls in the game of billiards in the cube. We prove that the monoid of morphisms mapping all words with Sturmian erasures to words with Sturmian erasures is not finitely generated

Biosensor Miniaturization for Non-invasive Measurements of Materials and Biological Tissues

International audienc

Miniaturization of a Microwave Biosensor for The Non-invasive Diagnosis of Biological Tissues

International audienc