Analysis of radiation effect of a novel SOI-Like LDMOS structure

2022 ◽  
Vol 129 ◽  
pp. 114471
Yang Yang ◽  
Ying Wang ◽  
Cheng-Hao Yu ◽  
Meng-Tian Bao ◽  
Fei Cao
Cuilin Cheng ◽  
Zhenyu Wang ◽  
Haitian Zhao ◽  
Aiju Hou ◽  
Rongchun Wang ◽  

2017 ◽  
Vol 6 (2) ◽  
pp. 34
Reddy V. Ramachandra ◽  
Reddy M. Suryanarayana ◽  
Nagendra N. ◽  
Rao A. Subba ◽  
Reddy M. Sudhakar ◽  

2005 ◽  
Vol 102 (Special_Supplement) ◽  
pp. 87-97 ◽  
Wen-Yuh Chung ◽  
Kang-Du Liu ◽  
Cheng-Ying Shiau ◽  
Hsiu-Mei Wu ◽  
Ling-Wei Wang ◽  

Object. The authors conducted a study to determine the optimal radiation dose for vestibular schwannoma (VS) and to examine the histopathology in cases of treatment failure for better understanding of the effects of irradiation. Methods. A retrospective study was performed of 195 patients with VS; there were 113 female and 82 male patients whose mean age was 51 years (range 11–82 years). Seventy-two patients (37%) had undergone partial or total excision of their tumor prior to gamma knife surgery (GKS). The mean tumor volume was 4.1 cm3 (range 0.04–23.1 cm3). Multiisocenter dose planning placed a prescription dose of 11 to 18.2 Gy on the 50 to 94% isodose located at the tumor margin. Clinical and magnetic resonance (MR) imaging follow-up evaluations were performed every 6 months. A loss of central enhancement was demonstrated on MR imaging in 69.5% of the patients. At the latest MR imaging assessment decreased or stable tumor volume was demonstrated in 93.6% of the patients. During a median follow-up period of 31 months resection was avoided in 96.8% of cases. Uncontrolled tumor swelling was noted in five patients at 3.5, 17, 24, 33, and 62 months after GKS, respectively. Twelve of 20 patients retained serviceable hearing. Two patients experienced a temporary facial palsy. Two patients developed a new trigeminal neuralgia. There was no treatment-related death. Histopathological examination of specimens in three cases (one at 62 months after GKS) revealed a long-lasting radiation effect on vessels inside the tumor. Conclusions. Radiosurgery had a long-term radiation effect on VSs for up to 5 years. A margin 12-Gy dose with homogeneous distribution is effective in preventing tumor progression, while posing no serious threat to normal cranial nerve function.

2010 ◽  
Vol 13 (3) ◽  
pp. 129-133
Ghusoon Ali Abdul Hasan Al-Sudany ◽  
Wasan Zuheir Majeed ◽  
Hind Jabbar Abdul Rhman Akram Al-Aubeidi ◽  

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