- 著者
- Hirotaka Yamamoto Mami Iima Yo Kishimoto Ayami Ohno Kishimoto Sho Koyasu Akira Yamamoto Yoshitaka Kawai Akira Yoshizawa Koichi Omori
- 出版者
- Japanese Society for Magnetic Resonance in Medicine
- 雑誌
- Magnetic Resonance in Medical Sciences (ISSN:13473182)
- 巻号頁・発行日
- pp.mp.2021-0149, (Released:2022-03-04)
- 参考文献数
- 26
- 被引用文献数
- 1
Purpose: To evaluate whether readout-segmented echo-planar imaging (RS-EPI) diffusion-weighted imaging (DWI) can reduce image distortion and improve the lesion identification in parathyroid adenomas (PTAs) compared to single-shot EPI (SS-EPI) DWI, and to determine whether PTAs can be differentiated from other soft tissue structures of the head and neck region by using the apparent diffusion coefficient (ADC) value.Methods: We retrospectively analyzed the preoperative MR images including DWI of 24 patients with surgically confirmed PTA. RS-EPI and SS-EPI DWI were evaluated by two independent readers for the identification of the lesions and distortion. The ADC values of the PTAs were compared with those of thyroid glands and cervical lymph nodes.Results: RS-EPI provided significantly less distortion compared to SS-EPI. RS-EPI tended to have better lesion identification compared with SS-EPI without a statistically significant difference. On SS-EPI, the PTAs had significantly higher ADC values compared with the cervical lymph nodes. On RS-EPI, the PTAs had significantly higher ADC values compared with the thyroid glands and cervical lymph nodes.Conclusion: RS-EPI reduces the DWI distortion in PTAs. The ADC value obtained using RS-EPI enables the differentiation of PTAs from nearby structures, such as thyroid glands and cervical lymph nodes.
- 著者
- Hirotaka Yamamoto Atsushi Iga Kaoru Ishihara Yuuichi Mita Hirohisa Suzuki
- 出版者
- The Institute of Electrical Engineers of Japan
- 雑誌
- IEEJ Transactions on Industry Applications (ISSN:09136339)
- 巻号頁・発行日
- vol.115, no.6, pp.702-711, 1995-05-20 (Released:2008-12-19)
- 参考文献数
- 33
- 被引用文献数
- 7 8
In the design, operation and evaluation of a photovoltaic power generation systems (PV systems), it is particularly important to accurately estimate the total amount of annual electric power generated by PV system. The authors applied a new I-V curve construction method developed for the calculation of output power from a photovoltaic array in order to develop a practical “simulation program for the calculation of the amount of electric power generated by PV system.” The following items were clarified by this research.