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Tetsutarou Oishi,Shigeru Morita,Chunfeng Dong,Motoshi Goto,Erhui Wang,Xianli Huang 한국물리학회 2014 THE JOURNAL OF THE KOREAN PHYSICAL SOCIETY Vol.64 No.6
Space-resolved vacuum ultraviolet (VUV) spectroscopy using a 3-m normal incidence spectrometeris utilized to measure the impurity emission profile in the edge and divertor plasmas of theLarge Helical Device (LHD). It measures the vertical profile of VUV lines emitted in the wavelengthrange of 300 − 3200 °A. CII, CIII, CIV, and CV lines emitted from carbon ions are successfully measured,and their ion temperatures are derived from the Doppler broadening. Vertical profiles ofthe emission intensity and the ion temperature are measured simultaneously for the CIV line. Theemission intensity profile, which has several peak structures, is reasonably explained by consideringthe relation between the C3+ ion distribution and the geometry used for the observations.
Ichiro Tateya,Shuko Morita,Seiji Ishikawa,Manabu Muto,Shigeru Hirano,Yo Kishimoto,Nao Hiwatashi,Juichi Ito 대한이비인후과학회 2016 Clinical and Experimental Otorhinolaryngology Vol.9 No.1
Objectives. Endoscopic laryngopharyngeal surgery (ELPS) is a minimally invasive transoral surgery that was developed to treat superficial larygo-pharyngeal cancer, in which a mucosal lesion is resected transorally while preserving deeper structures by subepithelial injection. The purpose of this retrospective study is to evaluate voice outcome in patients who underwent ELPS for superficial hypopharyngeal cancer. As important structures in producing voice, such as intrinsic laryngeal muscles, their fascia, and recurrent laryngeal nerve, are located in the medial side of the piriform sinus and the postcricoid region of the hypopharynx, we focused on patients with cancer lesions involving these regions. Methods. From April 2010 to March 2011, 25 consecutive patients with superficial laryngopharyngeal cancer were treated with ELPS at Kyoto University Hospital. Among the 25 patients, 11 patients with cancer lesions on the medial side of the piriform sinus or the postcricoid area were studied. Preoperative and postoperative voice functions including maximum phonation time (MPT), mean flow rate (MFR), jitter, shimmer, soft phonation index (SPI), and noise-to-harmonic ratio (NHR), were compared retrospectively. Results. Five of 11 cancer lesions had submucosal invasion and no lesion had invaded the muscular layer pathologically. T stage was classified as Tis in 5 cases, T1 in 4 cases, and T2 in 2 cases. All lesions involved the medial side of the piriform sinus and 2 also involved the postcricoid area. Vocal fold movement was normal in all cases after the surgery. Average preoperative and postoperative values for MPT, MFR, jitter, shimmer, SPI, and NHR, were 22.7 seconds and 23.4 seconds, 165 mL/sec and 150 mL/sec, 1.53% and 1.77%, 3.82% and 5.17%, 35.5 and 36.6, and 0.13% and 0.14%, respectively. There was no statistical difference between preoperative and postoperative data for all values examined. Conclusion. ELPS is useful in preserving voice function in the treatment of superficial hypopharyngeal cancer. Preserving the deeper structures including intrinsic muscles and their fascia may be important for preserving voice function as long as the lesions are superficial.