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Yin Lin,Wan Y. Lin,Ji A. Liang,Yu Y. Lu,Hsin Y. Wang,Shih C. Tsai,Chia H. Kao 대한영상의학회 2012 Korean Journal of Radiology Vol.13 No.6
Objective: Neuroendocrine cervical carcinoma is a rare subtype of cervical cancer. These tumors exhibit an aggressive behavior with early regional lymph node and distant metastases. The purpose of our study was to describe five cases of neuroendocrine cervical-vaginal carcinoma and to discuss the potential of the 2-[18F] fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography (18F-FDG PET/CT) scan for the detection of this rare malignancy. Materials and Methods: Five cases of cervical-vaginal neuroendocrine tumor were retrospectively collected, during a two year (from September 2009 to August 2011) period in our hospital. The clinical staging distributions were International Federation of Gynecology and Obstetrics (FIGO) stage IB2 (1 of 5), stage IIA (3 of 5) and stage IVA (1 of 5). Results: Two cases (cases 1 and 4) were restaged after 18F-FDG PET/CT scan in the initial staging process. Post-treatment 18F-FDG PET/CT scans, in three patients, revealed positive findings for tumor recurrence or lymph node metastases. Two patients (cases 2 and 3) died of tumor within two years. Conclusion: 18F-FDG PET/CT scan is a useful tool in cervical-vaginal neuroendocrine tumor. In its initial staging, the 18F-FDG PET/CT scan may help assess the possible nodal involvement or early hematogeneous spreading. We can also use the 18F-FDG PET/CT to detect local recurrence and to evaluate the treatment response after clinical manipulation. Objective: Neuroendocrine cervical carcinoma is a rare subtype of cervical cancer. These tumors exhibit an aggressive behavior with early regional lymph node and distant metastases. The purpose of our study was to describe five cases of neuroendocrine cervical-vaginal carcinoma and to discuss the potential of the 2-[18F] fluoro-2-deoxy-D-glucose positron emission tomography/computed tomography (18F-FDG PET/CT) scan for the detection of this rare malignancy. Materials and Methods: Five cases of cervical-vaginal neuroendocrine tumor were retrospectively collected, during a two year (from September 2009 to August 2011) period in our hospital. The clinical staging distributions were International Federation of Gynecology and Obstetrics (FIGO) stage IB2 (1 of 5), stage IIA (3 of 5) and stage IVA (1 of 5). Results: Two cases (cases 1 and 4) were restaged after 18F-FDG PET/CT scan in the initial staging process. Post-treatment 18F-FDG PET/CT scans, in three patients, revealed positive findings for tumor recurrence or lymph node metastases. Two patients (cases 2 and 3) died of tumor within two years. Conclusion: 18F-FDG PET/CT scan is a useful tool in cervical-vaginal neuroendocrine tumor. In its initial staging, the 18F-FDG PET/CT scan may help assess the possible nodal involvement or early hematogeneous spreading. We can also use the 18F-FDG PET/CT to detect local recurrence and to evaluate the treatment response after clinical manipulation.
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Identification of Common Mode Noise Current Path in a SiC Power Module
Chih-Ming Tzeng,Pin-Tzu Chiu,M.H. Pong,Yan-Cheng Liu,Chun-Jen Yao,Hsin-Han Lin,Yu-Hua Cheng,Huang-Jen Chiu 전력전자학회 2023 ICPE(ISPE)논문집 Vol.2023 No.-
Common mode current constituents a large part of EMI generated in power converters especially those power modules with a baseplate. It is most useful to be able to illustrate the noise current paths especially the CM current which flows through stray capacitance. This work illustrates a method to work out the critical current paths. FEA software computes the capacitances from the module layout structure. Power device capacitances are also included. Circuit simulation computes currents in various branches and verified by experiment. This work reveals that in addition to the knowledge that the switching node produces significant common mode current, the power rails are also essential coupling paths above the module baseplate. This is because of the linkage to the switching node by high device capacitances.
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