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Trends and Innovations in Autologous Breast Reconstruction
Speck Nicole E.,Grufman Vendela,Farhadi Jian 대한성형외과학회 2023 Archives of Plastic Surgery Vol.50 No.3
More than 40 years have passed since the description of the first “free abdominoplasty flap” for breast reconstruction by Holmström. In the meantime, surgical advances and technological innovations have resulted in the widespread adoption of autologous breast reconstruction to recreate the female breast after mastectomy. While concepts and techniques are continuing to evolve, maintaining an overview is challenging. This article provides a review of current trends and recent innovations in autologous breast reconstruction.
Alisha Merchant,Nicole E. Speck,Michal Michalak,Dirk J. Schaefer,Jian Farhadi 대한성형외과학회 2022 Archives of Plastic Surgery Vol.49 No.4
Background Seroma formation is the most common donor site complication following autologous breast reconstruction, along with hematoma. Seroma may lead to patient discomfort andmay prolong hospital stay or delay adjuvant treatment. The aim of this study was to compare seroma rates between the deep inferior epigastric perforator (DIEP), transverse musculocutaneous gracilis (TMG), and superior gluteal artery perforator (SGAP) donor sites. Methods The authors conducted a retrospective single-center cohort study consisting of chart review of all patients who underwent microsurgical breast reconstruction from April 2018 to June 2020. The primary outcome studied was frequency of seroma formation at the different donor sites. The secondary outcome evaluated potential prognostic properties associated with seroma formation. Third, the number of donor site seroma evacuations was compared between the three donor sites. Results Overall, 242 breast reconstructions were performed in 189 patients. Demographic data were found statistically comparable between the three flap cohorts, except for body mass index (BMI). Frequency of seroma formation was highest at the SGAP donor site (75.0%), followed by the TMG (65.0%), and DIEP (28.6%) donor sites. No association was found between seroma formation and BMI, age at surgery, smoking status, diabetes mellitus, neoadjuvant chemotherapy, or DIEP laterality. The mean number of seroma evacuations was significantly higher in the SGAP and the TMG group compared with the DIEP group.
Effective screening and the plasmaron bands in graphene
Walter, Andrew L.,Bostwick, Aaron,Jeon, Ki-Joon,Speck, Florian,Ostler, Markus,Seyller, Thomas,Moreschini, Luca,Chang, Young Jun,Polini, Marco,Asgari, Reza,MacDonald, Allan H.,Horn, Karsten,Rotenberg, American Physical Society 2011 Physical review. B, Condensed matter and materials Vol.84 No.8
Oh, Se‐,Hong,Chung, Jun‐,Young,In, Myung‐,Ho,Zaitsev, Maxim,Kim, Young‐,Bo,Speck, Oliver,Cho, Zang‐,Hee Wiley Subscription Services, Inc., A Wiley Company 2012 Magnetic resonance in medicine Vol.68 No.4
<P><B>Abstract</B></P><P>Despite its wide use, echo‐planar imaging (EPI) suffers from geometric distortions due to off‐resonance effects, i.e., strong magnetic field inhomogeneity and susceptibility. This article reports a novel method for correcting the distortions observed in EPI acquired at ultra‐high‐field such as 7 T. Point spread function (PSF) mapping methods have been proposed for correcting the distortions in EPI. The PSF shift map can be derived either along the nondistorted or the distorted coordinates. Along the nondistorted coordinates more information about compressed areas is present but it is prone to PSF‐ghosting artifacts induced by large <I>k</I>‐space shift in PSF encoding direction. In contrast, shift maps along the distorted coordinates contain more information in stretched areas and are more robust against PSF‐ghosting. In ultra‐high‐field MRI, an EPI contains both compressed and stretched regions depending on the <I>B</I><SUB>0</SUB> field inhomogeneity and local susceptibility. In this study, we present a new geometric distortion correction scheme, which selectively applies the shift map with more information content. We propose a PSF‐ghost elimination method to generate an artifact‐free pixel shift map along nondistorted coordinates. The proposed method can correct the effects of the local magnetic field inhomogeneity induced by the susceptibility effects along with the PSF‐ghost artifact cancellation. We have experimentally demonstrated the advantages of the proposed method in EPI data acquisitions in phantom and human brain using 7‐T MRI. Magn Reson Med, 2012. © 2011 Wiley Periodicals, Inc.</P>
배시영,D.S. Lee,B.H. Kong,H.K. Cho,J.F. Kaeding,S. Nakamura,S.P. DenBaars,J.S. Speck 한국물리학회 2011 Current Applied Physics Vol.11 No.3
(1122) semipolar GaN thin films were grown on intentionally miscut m-plane sapphire substrates using metal organic chemical vapor deposition. We investigated the material and electrical characteristics by changing the miscut angle from -1° to +1°. While the coexistence of (1122) surface and inclined {1011}surfaces was observed on GaN films on the on-axis m-plane sapphire substrates,{1011}surfaces were dominant on the GaN films on the +1° miscut sapphire substrates. As the miscut angle was changed from -1° to +1°, the crystallinity of the GaN films and the electroluminescence intensity of the LEDs were significantly improved.
Bae, S.Y.,Lee, D.S.,Kong, B.H.,Cho, H.K.,Kaeding, J.F.,Nakamura, S.,DenBaars, S.P.,Speck, J.S. Elsevier 2011 Current Applied Physics Vol.11 No.3
(112@?2) semipolar GaN thin films were grown on intentionally miscut m-plane sapphire substrates using metal organic chemical vapor deposition. We investigated the material and electrical characteristics by changing the miscut angle from -1<SUP>o</SUP> to +1<SUP>o</SUP>. While the coexistence of (112@?2) surface and inclined {101@?1} surfaces was observed on GaN films on the on-axis m-plane sapphire substrates, {101@?1} surfaces were dominant on the GaN films on the +1<SUP>o</SUP> miscut sapphire substrates. As the miscut angle was changed from -1<SUP>o</SUP> to +1<SUP>o</SUP>, the crystallinity of the GaN films and the electroluminescence intensity of the LEDs were significantly improved.