Search results for "Bioengineering"
showing 10 items of 1963 documents
Radiolabeling for long term biodistribution of ultrasmall nanoparticles designed for radiotherapy guided by MRI
2016
International audience
Brain lateralization probed by water diffusion at the atomic to micrometric scale
2019
International audience; Combined neutron scattering and diffusion nuclear magnetic resonance experiments have been used to reveal significant interregional asymmetries (lateralization) in bovine brain hemispheres in terms of myelin arrangement and water dynamics at micron to atomic scales. Thicker myelin sheaths were found in the left hemisphere using neutron diffraction. 4.7 T dMRI and quasi-elastic neutron experiments highlighted significant differences in the properties of water dynamics in the two hemispheres. The results were interpreted in terms of hemisphere-dependent cellular composition (number of neurons, cell distribution, etc.) as well as specificity of neurological functions (s…
First steps toward the generation of PET/MR attenuation map in the case of prostate cancer
2015
Congrès sous l’égide de la Société Française de Génie Biologique et Médical (SFGBM).; National audience; A new methodology providing the first step towards the generation of attenuation maps for PET/MR systems based solely on MR information is presented in this paper. From T1-and T2-weighted MR data set and anatomical-based knowledge, our method segments and classifies the attenuation-differing regions of the patient's pelvis using a robust implementation of the weighted fuzzy C-means algorithm. Providing no signal, particular process is performed for the bones. We have demonstrated the feasibility of this approach by correctly segmenting and classifying six attenuation-differing regions on…
Chapter 16 - Carbon Nanotubes: Synthesis, Characterization, and Applications in Drug-Delivery Systems
2019
International audience; Nanoparticles are increasingly being considered in the medical field as an effective means to deliver drugs of interest or as diagnostic biosensors. Carbon nanotubes (CNTs) are an allotropic form of carbon related to the fullerene family. Their exceptional thermal, mechanical, and electronical properties together with their tubular shape, offering a high surface area and enabling adsorption or conjugation of a wide variety of therapeutic drugs or diagnostic agents, make CNTs attractive platforms for the treatment of various diseases. This chapter reviews the emerging synthesis, characterization, and and discusses the perspectives and obstacles of these promising nano…
Vers le développement d'un capteur photoplétysmographique sans contact
2019
Heart-rate estimation performed with remote photoplethysmography is a very active research field. Since pioneer works in 2010, which demonstrated the feasibility of the measure with low-grade consumers’ camera (webcam), the number of scientific publications have increased significantly in the domain. Hence, we observe a multiplication of the methods in order to retrieve the photoplethysmographic signal which has led to an increased precision and quality of the heart-rate estimation. Region of interest segmentation is a key step of the processing pipeline in order to maximize the quality of the measured signal. We propose a new method to perform remote photoplethysmographic measurement using…
Impact of perturbations on the neuron response
2017
International audience; We propose an overview of the effects of deterministic and stochastic perturbations on the response of a neuron. Our study is based on numerical simulations and experiments with an elementary neural circuit. We use different excitations to highlight various phenomena such as Mode locking, Vibrational Resonance, Ghost Stochastic Resonance... We close the study with a lattice of coupled circuit.
Implementation of routine sequential PET/MR of the rat heart in an in-line preclinical scanner
2016
International audience
Initial performance evaluation of a preclinical PETscanner available as a clippable assembly in a sequential PET/MRI system
2016
International audience
18F-Choline PET/CT and multiparametric MRI for the detection of local recurrence of prostate cancer initially treated by radiotherapy: comparison wit…
2016
International audience
Dual Diagnostic Role of I-123-MIBG Scintigraphy in Inverted Takotsubo Cardiomyopathy: Reply
2016
International audience