著者

増田 俊夫 早見 崇 中條 大志 Hayami Takashi 中條 大志 Nakajo Hiroshi 原 道寛 Hara Michihiro 佐藤 潤一 Sato Junichi 寺本 好邦 Teramoto Yoshikuni 西尾 嘉之 Nishio Yoshiyuki

出版者

福井工業大学

雑誌

福井工業大学研究紀要 Memoirs of Fukui University of Technology (ISSN:18844456)

巻号頁・発行日

no.43, pp.284-292, 2013

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Ethy1cellulose (EC) exhibits interesting behavior in the formation of liquid crystals. Early observations indicated that most cellulosics formed right-handed cholesteric structure. However, EC in chloroform and acetic acid (AA) solutions took left-handed cholesteric liquid crystals, whereas EC in dichloroacetic acid (DCA) solution had right-handed ones. In the present study, (phenylacetyl)ethylcellulose (PA-EC) was prepared by the reaction of phenylacetyl chloride with EC having a degree of ethyl substitution (DSEt) of 2.26 in N,N-dimethylacetamide solution using triethylamine as proton scavenger. Reactions were usually carried out at room temperature for one week, which provided a variety of phenylacetyl contents (degree of substitution of phenylacetyl (DSPa) = 0.02, 0.11, 0.32, and 0.43). The chloroform and AA solutions of PA-EC with DSPa = 0.32 displayed a right-handed cholesteric liquid crystalline phase, while the DCA solution showed a left-handed one.

著者

OKIZAKI Atsutaka SHUKE Noriyuki SATO Junichi ISHIKAWA Yukio YAMAMOTO Wakako KIKUCHI Kenjiro ABURANO Tamio

雑誌

Annals of nuclear medicine (ISSN:09147187)

巻号頁・発行日

vol.17, no.7, pp.575-582, 2003-10-01

被引用文献数

2

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The original publication is available at www.springerlink.comauthorThe purpose of this study was to verify whether the accuracy of left ventricular parameters related to left ventricular function from gated-SPECT improved or not, using multivariate analysis. METHODS: Ninety-six patients with cardiovascular diseases were studied. Gated-SPECT with the QGS software and left ventriculography (LVG) were performed to obtain left ventricular ejection fraction (LVEF), end-diastolic volume (EDV) and end-systolic volume (ESV). Then, multivariate analyses were performed to determine empirical formulas for predicting these parameters. The calculated values of left ventricular parameters were compared with those obtained directly from the QGS software and LVG. RESULTS: Multivariate analyses were able to improve accuracy in estimation of LVEF, EDV and ESV. Statistically significant improvement was seen in LVEF (from r = 0.6965 to r = 0.8093, p < 0.05). Although not statistically significant, improvements in correlation coefficients were seen in EDV (from r = 0.7199 to r = 0.7595, p = 0.2750) and ESV (from r = 0.5694 to r = 0.5871, p = 0.4281). CONCLUSION: The empirical equations with multivariate analysis improved the accuracy in estimating LVEF from gated-SPECT with the QGS software.