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Automatic Optimization of Chirp Setting Parameters in Medical Ultrasound Contrast Imaging

Journal of Life Sciences 2013年第6期7卷 592-598页

作者： Amira Zaylaa Sebastien Menigot Jamal Charara Jean-Marc Girault Department of Medical Biophysics and Imaging Universite Franqois Rabelais de Tours UMR-S930 and ERL3106 B.P 3223Tours France INSERM U930 Tours France Department of Physics and Electronics Lebanese University Hadath Campus B.P. 5 Beirut Lebanon IUT Ville d'Avray Universite Paris Ouest Nanterre La Defense B.P. 105 Avray France

Medical ultrasound contrast imaging is a powerful modality undergoing successive developments in the last decade to date. Lately, pulse inversion has been used in both ultrasound tissue harmonic and contrast imaging. However, there was a tradeoff between resolution and penetration. Chirp excitations partially solved the tradeoff, but the chirp setting parameters were not optimized. The present work proposes for the first time combining chirp inversion with ultrasound contrast imaging, with the motivation to improve the contrast, by automatically optimizing the setting parameters of chirp excitation, it is thus an optimal command problem. Linear chirps, 5 μm diameter microbubbles and gradient ascent algorithm were simulated to optimize the chirp setting parameters. Simulations exhibited a gain of 5 dB by automatic optimization of chirp inversion relative to pulse inversion. The automatic optimization process was quite fast. Combining chirp inversion with ultrasound contrast imaging led to a maximum backscattered power permitting high contrast outcomes and optimum parameters.

关键词：线性啁啾医学超声自动优化造影设置成像模拟优化高对比度

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Genetic causes of macrozoospermia and proposal for an optimized genetic diagnosis strategy based on sperm parameters

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Journal of Genetics and Genomics 2023年第7期50卷 536-540页

作者： Alicia Coudert Caroline Cazin Amir Amiri-Yekta Selima Fourati Ben Mustapha Raoudha Zouari Julien Bessonat Abdelali Zoghmar Antoine Clergeau Catherine Metzler-Guillemain Chema Triki Herve Lejeune Nathalie Sermondade Eva Pipiras Nadia Prisant Isabelle Cedrin Leila Keskes Florence Lestrade Laetitia Hesters Nathalie Rives Beatrice Dorphin Agnes Guichet Catherine Patrat Emmanuel Dulioust Aur elie Feraille Franc ois Robert Eric Bieth Arthur Sorlin Jean-Pierre Siffroi Mariem Ben Khelifa Florence Boiterelle Sylvianne Hennebicq Veronique Satre Christophe Arnoult Charles Coutton Anne-Laure Barbotin Nicolas Thierry-Mieg Zine-Eddine Kherraf Pierre F.Ray Genetic Epigenetic and Therapies of Infertility Team Institute for Advanced BiosciencesInserm U 1209CNRS UMR 5309Universite Grenoble Alpes38000GrenobleFrance CHU Grenoble Alpes UM GI-DPI38000GrenobleFrance CHU Grenoble Alpes UM de Genetique Chromosomique38000GrenobleFrance Department of Genetics Reproductive Biomedicine Research CenterRoyan Institute for Reproductive BiomedicineACECRTehranIran Polyclinique les Jasmins Centre d’Aide M edicale a la Procr eationCentre Urbain Nord1003TunisTunisia CHU Grenobles Alpes UF de Biologie de la Procr eation38000GrenobleFrance Reproduction Sciences and Surgery Clinique Ibn RochdConstantineAlgeria CHU Caen CECOS de CaenD epartement de BiologieUnit e de Biologie de la Reproduction14033CaenFrance APHM Hopital La-Conception P^ole Femmes-parents-enfantsCentre Clinico-biologique d’assistance M edicale a la Procr eation-CECOS13385 MarseilleFrance Aix-Marseille Univ InsermMMGU125113385 Marseille Medical Genetics13385 MarseilleFrance Clinique Hannibal Centre d’AMPLes Berges du Lac1053TunisTunisia Reproductive Medicine Department Hospices Civil de LyonLyonFrance Hopital Jean Verdier Universit e Sorbonne Paris NordParisFrance CHU de Pointe-a-Pitre/Abymes GuadeloupeFrance Service de Medecine de la Reproduction CHU Jean VerdierParisFrance Faculte de M edecine de Sfax SfaxTunisia CHR Metz-Thionville Service d’Assistance Medicale a la Procr eation57530Ars-LaquenexyFrance Unit of Reproductive Biology Antoine B ecl ere University HospitalUniversity Paris SudClamartParis-Sud UniversityLe Kremlin Bic^etreFrance Univ Rouen Normandie Inserm U1239NorDICAdrenal and Gonadal PathophysiologyReproductive Biology Laboratory-CECOSRouen University Hospital76031Rouen CedexFrance CHAL Centre Hospitalier Alpes Leman Centre AMP7474130Contamine-sur-ArveFrance CHU Angers Service de Gen etique49933AngersINSERM U1083France Service de Biologie de la Reproduction-CECOS Hopital Cochin 74014ParisFrance IRH Medicentre Clinique du Val d’Ouest39

Macrozoospermia,characterized by the presence of largeheaded spermatozoa usually carrying several flagella,is one of the most severe phenotypes of male *** in most cases,the gametes are chromosomally abnormal and cannot be used for assisted reproductive technologies(ART)(Ray et al.,2017).In 2007,subjects from consanguineous families were shown to carry the same homozygous deleterious AURKC variant(NM_001015878.2:c.144delC,later renamed c.145delC,***49TrpfsTer23),establishing AURKC as the first and main gene associated with macrozoospermia(Dieterich et al.,2007).Using flow cytometry,all spermatozoa from patients homozygous for the c.145delC variant were shown to be tetraploid,highlighting a cytokinesis blockage of the first meiotic divisions thus confirming that ART cannot be successful for these patients(Dieterich et al.,2009).

关键词： diagnosis establishing

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