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Rah, Jeong-Eun,Kim, Gwe-Ya,Oh, Do Hoon,Kim, Tae Hyun,Kim, Jong Won,Kim, Dae Yong,Park, Sung Yong,Shin, Dongho BioMed Central 2016 Radiation oncology Vol.11 No.-
<P><B>Background</B></P><P>The purpose of this study is to evaluate the dosimetric benefits of a proton arc technique for treating tumors of the para-aortic lymph nodes (PALN).</P><P><B>Method</B></P><P>In nine patients, a proton arc therapy (PAT) technique was compared with intensity modulated radiation therapy (IMRT) and proton beam therapy (PBT) techniques with respect to the planning target volume (PTV) and organs at risk (OAR). PTV coverage, conformity index (CI), homogeneity index (HI) and OAR doses were compared. Organ-specific radiation induced cancer risks were estimated by applying organ equivalent dose (OED) and normal tissue complication probability (NTCP).</P><P><B>Results</B></P><P>The PAT techniques showed better PTV coverage than IMRT and PBT plans. The CI obtained with PAT was 1.19 ± 0.02, which was significantly better than that for the IMRT techniques. The HI was lowest for the PAT plan and highest for IMRT. The dose to the OARs was always below the acceptable limits and comparable for all three techniques. OED results calculated based on a plateau dose–response model showed that the risk of secondary cancers in organs was much higher when IMRT or PBT were employed than when PAT was used. NTCPs of PAT to the stomach (0.29 %), small bowel (0.69 %) and liver (0.38 %) were substantially lower than those of IMRT and PBT.</P><P><B>Conclusion</B></P><P>This study demonstrates that there is a potential role for PAT as a commercialized instrument in the future to proton therapy.</P>
A Case of Photic Retinal Injury Associated with Exposure to Plasma Arc Welding
( Sung Won Choi ),( Ko I Chun ),( Seok Joon Lee ),( Sang Hoon Rah ) 대한안과학회 2006 Korean Journal of Ophthalmology Vol.20 No.4
Purpose: To report of photic retinopathy induced by plasma arc welding, and the OCT (optical coherence tomography) results of damaged retinal lesions. Methods: We describe a case report of a 37-year-old male, working in the steel industry, who presented with central scotoma in both eyes. Results: On his first visit, one day after performing plasma arc welding with protective gear at work, his best corrected vision was 0.7 for both eyes. Ophthalmic examination of the fundus showed a round yellow lesion with an approximate size of 300 micrometers superonasal to the fovea of both eyes. On his next visit, one month later, his vision had recovered to 1.0, his symptoms had improved, and the ophthalmoscopic examination of the fundus revealed that the round yellow spots had disappeared from both eyes. Conclusions: To our knowledge, this is the first report of photic retinopathy induced by plasma arc welding, and the OCT (optical coherence tomography) results of damaged retinal lesions have not previously been reported. For these reasons, we report this case.
A Case of Photic Retinal Injury Associated with Exposure to Plasma Arc Welding
Sung-Won Choi,Ko-I Chun,Seok-Joon Lee,Sang-Hoon Rah 대한안과학회 2006 Korean Journal of Ophthalmology Vol.20 No.3
Purpose: To report of photic retinopathy induced by plasma arc welding, and the OCT (optical coherence tomography) results of damaged retinal lesions. Methods: We describe a case report of a 37-year-old male, working in the steel industry, who presented with central scotoma in both eyes. Results: On his first visit, one day after performing plasma arc welding with protective gear at work, his best corrected vision was 0.7 for both eyes. Ophthalmic examination of the fundus showed a round yellow lesion with an approximate size of 300 micrometers superonasal to the fovea of both eyes. On his next visit, one month later, his vision had recovered to 1.0, his symptoms had improved, and the ophthalmoscopic examination of the fundus revealed that the round yellow spots had disappeared from both eyes. Conclusions: To our knowledge, this is the first report of photic retinopathy induced by plasma arc welding, and the OCT (optical coherence tomography) results of damaged retinal lesions have not previously been reported. For these reasons, we report this case. Korean Journal of Ophthalmology 20(4):250-253, 2006
이상훈 ( Sang Hoon Lee ),강주원 ( Ju Won Kang ),정용운 ( Yong Un Chung ),이채용 ( Chai Yong Lee ),한동운 ( Dong Un Han ),위성환 ( Sung Hwan Wee ),윤소라 ( So Rah Yoon ),조재진 ( Jae Jin Cho ),강문일 ( Mun Il Kang ) 한국가축위생학회 2008 韓國家畜衛生學會誌 Vol.31 No.4
The prevalence of major calf disease was investigated in 117 Holstein dairy calves in Chonnam area. All of them were moved in the College experimental farm which is operated in intensive units. clinical signs were daily examined throughout two months after the introduction of the College farm. Among calves, 92 cases(78.6%) died in the two months after the introduction in it. Outbreaks of respiratory and alimentary diseases were their main causes of their fatality. The incidence of respiratory disorders during the full period of the experiment was up to 42.8 %, and the alimentary diseases were occurred 35.9% of the herd. Most of the mortality was related with respiratory(59.9%) and alimentary(52.1%) pathogens. Also calf mortality by combined infection claimed 6.6% among 100 morbidity cases. Principle pathogens to cause mortality were Pasteurella spp(44.4%), E coli(29.9%), bovine viral diarrhea virus(16.2%), IBRV(12.0%), respectively. Viruses also played as an important role in increasing calf morbidity to secondary respiratory bacterial pathogens. Pasteurella infection combined with infectious bovine rhinotracheitis virus(11 cases), para-influenza virus type-3(9 cases), or bovine respiratory syncytial virus(7 cases) was appeared as major pattern to mortality. colibacillosis in causing enteritis was concurrently infected with BVD(19 cases), bovine coronavirus infection(14 cases), salmonellosis(5 cases), coccidiosis(5 cases) and clostridial infection(4 cases). Ninty-two cases to death were appeared to have 100% neutralizing antibodies to BCV; Among them, 73.8% had the neutralizing antibody level higher than 64. Calves with neutralizing antibodies higher than 16 to BVDV were 50%. The cases with neutralizing antibody level lower than 8 to BEFV were 89.4% that means the necessity of appropriate vaccination.