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Kunihiro SUZUKI,Yoko TADA,Yuji KATAOKA,Tsutomu NAGAYAMA 대한전자공학회 2009 Journal of semiconductor technology and science Vol.9 No.1
Monte Carlo simulation is widely used for predicting ion implantation profiles in amorphous targets. Here, we compared Monte Carlo simulation results with a vast database of ion implantation secondary ion mass spectrometry (SIMS), and showed that the Monte Carlo data sometimes deviated from the experimental data. We modified the electron stopping power model, calibrated its parameters, and reproduced most of the database. We also demonstrated that Monte Carlo simulation can accurately predict profiles in a low energy range of around 1 keV once it is calibrated in the higher energy region.
Suzuki, Kunihiro,Tada, Yoko,Kataoka, Yuji,Nagayama, Tsutomu The Institute of Electronics and Information Engin 2009 Journal of semiconductor technology and science Vol.9 No.1
Monte Carlo simulation is widely used for predicting ion implantation profiles in amorphous targets. Here, we compared Monte Carlo simulation results with a vast database of ion implantation secondary ion mass spectrometry (SIMS), and showed that the Monte Carlo data sometimes deviated from the experimental data. We modified the electron stopping power model, calibrated its parameters, and reproduced most of the database. We also demonstrated that Monte Carlo simulation can accurately predict profiles in a low energy range of around 1keV once it is calibrated in the higher energy region.
Suzuki, Kunihiro,Kojima, Shuichi The Institute of Electronics and Information Engin 2010 Journal of semiconductor technology and science Vol.10 No.4
We proposed a tail function parameter extraction procedure for the establishment of a robust ion implantation database. We showed that, for the expression of ion implantation profiles, there are many local minimum values set for the third and fourth moment parameters of $\gamma$ and $\beta$ for the Pearson function that comprises the standard dual Pearson and tail functions. We proposed the use of a joined tail function as a mediate function to extract $\gamma$ and $\beta$, and demonstrated that this enables us to extract the parameters uniquely. Other parameters associated with channeling phenomena can also be simply and uniquely extracted by our procedure.
Kunihiro SUZUKI,Shuichi KOJIMA 대한전자공학회 2010 Journal of semiconductor technology and science Vol.10 No.4
We proposed a tail function parameter extraction procedure for the establishment of a robust ion implantation database. We showed that, for the expression of ion implantation profiles, there are many local minimum values set for the third and fourth moment parameters of r and β for the Pearson function that comprises the standard dual Pearson and tail functions. We proposed the use of a joined tail function as a mediate function to extract r and β, and demonstrated that this enables us to extract the parameters uniquely. Other parameters associated with channeling phenomena can also be simply and uniquely extracted by our procedure.
Kunihiro SUZUKI,Yoko TADA,Yuji KATAOKA,Tsutomu NAGAYAMA 대한전자공학회 2009 Journal of semiconductor technology and science Vol.8 No.1
Monte Carlo simulation is widely used for predicting ion implantation profiles in amorphous targets. Here, we compared Monte Carlo simulation results with a vast database of ion implantation secondary ion mass spectrometry (SIMS), and showed that the Monte Carlo data sometimes deviated from the experimental data. We modified the electron stopping power model, calibrated its parameters, and reproduced most of the database. We also demonstrated that Monte Carlo simulation can accurately predict profiles in a low energy range of around 1 keV once it is calibrated in the higher energy region.
Clinical outcomes of permanent stenting with endoscopic ultrasound gallbladder drainage
Eisuke Suzuki,Yuji Fujita,Kunihiro Hosono,Yuji Koyama,Seitaro Tsujino,Takuma Teratani,Atsushi Nakajima,Nobuyuki Matsuhashi 대한소화기내시경학회 2023 Clinical Endoscopy Vol.56 No.5
Background/Aims: Endoscopic ultrasound gallbladder drainage (EUS-GBD) is gaining attention as a treatment method for cholecystitis. However, only a few studies have assessed the outcomes of permanent stenting with EUS-GBD. Therefore, we evaluated the clinicaloutcomes of permanent stenting using EUS-GBD. Methods: This was a retrospective, single-center cohort study. The criteria for EUS-GBD at our institution are a high risk for surgery,inability to perform surgery owing to poor performance status, and inability to obtain consent for emergency surgery. EUS-GBD wasperformed using a 7-Fr double-pigtail plastic stent with a dilating device. The primary outcomes were the recurrence-free rate of cholecystitisand the late-stage complication-avoidance rate. Secondary outcomes were technical success, clinical success, and procedural adverseevents. Results: A total of 41 patients were included in the analysis. The median follow-up period was 168 (range, 10–1,238) days. The recurrence-free and late-stage complication-avoidance rates during the follow-up period were 95% (38 cases) and 90% (36 cases), respectively. There were only two cases of cholecystitis recurrence during the study period. Conclusions: EUS-GBD using double-pigtail plastic stent was safe and effective with few complications, even in the long term, in patientswith acute cholecystitis.