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폐암의 진단에서 Endobronchial Ultrasound-Guided Transbronchial Needle Aspiration (EBUS-TBNA)의 역할
엄상원 한양대학교 의과대학 2014 Hanyang Medical Reviews Vol.34 No.1
Convex-probe endobronchial ultrasound-guided transbronchial needle aspiration (CP-EBUS-TBNA) has emerged as a new diagnostic modality that allows ultrasound-guided, real-time needle aspiration of mediastinal and hilar lymph nodes. Mediastinoscopy has been the reference standard for neoplastic staging in the mediastinum, but it is invasive and requires general anesthesia. Considering recent prospective studies and clinical guidelines, a needle technique such as EBUS-TBNA and endoscopic ultrasound-guided fine needle aspiration (EUS-FNA) should be performed first for the mediastinal nodal staging of non-small lung cancer. Combining EBUS-TBNA and EUS-FNA will replace more invasive methods such as mediastinoscopy. CP-EBUS-TBNA can also be used for the restaging after neoadjuvant therapy, the diagnosis of recurrent lung cancer and central lung parenchymal lesion which abuts trachea or bronchi. In the era of personalized medicine, good-quality and sufficient tissues need to be obtained for the molecular testing and treatment guidance. EBUS-TBNA has the ability to obtain satisfactory material for the detection of EGFR mutation, KRAS mutation, and EML-ALK fusion gene.
A Highly Crystalline Semiconducting Polymers by Using Eutectic Friction Transfer Lithography
엄상원,박소영,강영종 한국고분자학회 2021 한국고분자학회 학술대회 연구논문 초록집 Vol.46 No.1
We report a solid-state lithography technique utilizing the eutectic friction transfer (EFT). eutectic friction transfer (EFT) is based on the eutectic melting by frictional heating at the interface between the pellet made of semiconducting polymer/matrix mixture and the substrate. Due to the significantly lowered melting temperature by formation of eutectic mixtures (< 65 °C), various semiconducting polymers can be easily melted and transferred on the substrate simply by rubbing the pellet on the substrate. in this case, semiconducting polymer chains can be uniaxially aligned and crystallized by the frictional shear force. Various semiconducting polymer crystals formed by simple rubbing process at mild condition. Strong anisotropic optical properties suggest that J-type packing is dominant in EFTL microwires because of the highly extended and planarized crystal structures.