Hamid OUAMARA, PhD

Responsibilities - Implementation of the Agile/Scrum methodology in R&D department - As a leader, coaching the software and algorithms experienced team members, and develop their expertise - An active member of the management team of the site as well as a support expert to the global projects teams within Detection Technology group - As a technical referent, my responsibilities span from research on new technologies to product specification. - As a technical referent, my responsibilities span from research on new technologies to product specification - Lead the watch on spectrometry and related new technologies (active participation in conferences and seminars, reading of reports and articles…) - Propose new innovation projects, conduct technical feasibility studies, take part in the redaction of patents (and manage patenting suppliers) - Participate in product specification preparation and in the validation of the output/deliverable in my technical field, review test results and prepare reports - Scan the market for potential suppliers and partners for algorithms, take responsibility for the application user guide and write white papers or technical publications - My expertise, as a multi-energy specialist, is required to support our business development given I am in direct contacts with customers to promote and measure the interest of the technology, to train them on multi-energy detectors and help them design their application solutions - Presenting technical publications, white papers, etc. to workshops and conferences will participate in the promotion of technology

Responsibilities - Scientific and technical expert of products and Training new users. - Internal referee for all questions related to benefit / risk and clinical performance. - Very good knowledge of products / product ranges and their environments. - Define protocols for clinical studies, Clinical Evaluation Plan, good conduct and monitoring of clinical trials. - Image quality and dosimetry expert. - Understand the end-customer's need, research of innovative technical solutions - Define pathology detection protocols (Myeloma for example) - Very good knowledge of products / product ranges and their environments. - Participate actively in development and feasibility testing and upstream research. - Contribute to the development and writing of the functional specifications of the product. - Very good skills in instrumentation and experimentation. - Good understanding of the regulatory environment specific to medical devices (IEC60601-1, 510K, ISO 13485, ISO 14971, IEC 60601) and ensure consistency with regulatory requirements. - Physical measurements of the X-ray chain and detectors characterization - Conduct research and technological developments in osteoarticular imaging. - Define the imaging protocols for the X-ray exams performed with the EOS system (kV, mA). - Very good knowledge of imaging techniques based on X-ray and gamma radiation. Principle and Physics of CT and PET, Ultrasound and X-ray and gamma detectors, -Development and applications of a very short echo-time MRI technique for the imaging of solid biological tissues. - Prototype solutions to allow validation internally before following the complete development cycle until the complete validation of the product (V cycle and Scrum method). - Develop image processing algorithms to correct and enhance 2D radiographic images.

Title : Comparison of photon counting versus charge integration micro-CT within the irradiation setup PIXSCAN The pathway that has been followed by the imXgam team at CPPM was to adapt the hybrid pixel technology XPAD to biomedical imaging. It is in this context that the micro-CT PIXSCAN II based on the new generation of hybrid pixel detectors called XPAD3 has been developed. This thesis describes the process undertaken to assess the contribution of the hybrid pixel technology in X-ray computed tomography in terms of contrast and dose and to explore new opportunities for biomedical imaging at low doses. Performance evaluation as well as the validation of the results obtained with data acquired with the detector XPAD3 were compared to results obtained with the CCD camera DALSA XR-4 similar to detectors used in most conventional micro-CT systems. The detector XPAD3 allows to obtain reconstruced images of satisfactory quality close to that of images from the DALSA XR-4 camera, but with a better spatial resolution. At low doses, the images from the detector XPAD3 have a better quality that is those from CCD camera. From an instrumentation point of view, this project demonstrated the proper erations of the device PIXSCAN II for mouse imaging. We were able to reproduce an image quality similar to that obtained with a charge integration detector such as a CCD camera. To improve the performance of the detector XPAD3, we will have to optimize the stability of the thresholds and in order to obtain more homogeneous response curves of the pixels as a function as energy by using a denser sensor such as CdTe.

- Mathematics - Optics - Electrokinetics - Electronics

PhD student: Comparison of photon counting versus charge integration micro-CT within the irradiation setup PIXSCAN Keywords: CT, small animal imaging, XPAD3, hybrid pixel detector, charge integration detector, CCD, PIXSCAN https://tel.archives-ouvertes.fr/file/index/docid/823345/filename/HamidOuamaraTheseVC.pdf

Medical imaging techniques: MRI, CT, ULTRASOUND ... etc. signal processing: Optimal and adaptive filtering, estimation identification. Image processing : segmentation, contrast enhancement, spatial resolution, signal to noise ratio