As modern science is developed and advanced, examination and number of times using radiation are increasing daily. General diagnostic X-ray generator is installed on stationary form, But X-ray generator was developed because patient who is in the intensive care unit, operation room, emergency room can not move to general x-ray room. What we examine patient by x-ray generator is certainly necessary, So patient exposure is inevitable. but reducing radiation exposure is highly important matter about radiation technology, guardian, patient in the same hospital room, nurse etc. For this reason, rule regarding safety control of diagnostic x-ray generator revised for radiation worker, patient and protector proclaim that mobile diagnostic x-ray shield must placed in case of examine different location excluding operation room, emergency room, intensive care unit. But, radiogical technologist is having a lot of difficulties to examine with mobile x-ray generator, diagnostic x-ray shield partition, image plate and lead apron. So, when we use x-ray generator, we manufacture shield tools can be attached to the mobile x-ray generator On behalf of x-ray shield partition and conduct analysis and in comparison to part of body and distribution of dose rate and find way to reduce radiation exposure through distribution of dose rate of patient within the radiogical technologist, medical team. Mobile x-ray generator aimed at SHIMADZU inc. R-20, We manufactured equipment for shielding x-ray scattered x-ray by installing shielding wall from side to side based on support beam on the mobile x-ray generator. Shielding wall when moving can be folded and designed to expand when examine. Experiment measured five times in each by an angle for dose rate of eyes, thyroid, breast, abdomen and gonad on exposure condition of upper and lower extremity, chest, abdomen which is examined many times by mobile x-ray generator. We used dosimeter RSM-100 made by IJRAD and measured a horizontal dose rate by body part. The result of an experiment, shielding decreasing rate of the front and the rear showed 77 ~ 98.7%. Therefore using self-production shielding wall reduce scattered x-ray occurrence rate and confirm can decrease exposure dose consequently. Therefore, through this study, reduction result which is used shielding wall of self-production will be a role of shielding optimization and it could be answer about reduction of medical exposure recommended by ICRP 103.
Kim, Chung-Sook;Lee, Je-Hyun;Ma, Jin-Yeul;Jeon, Won-Kyung
Korean Journal of Oriental Medicine
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v.1
no.1
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pp.401-418
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1995
Aging process can be explained by many factors. In this study, we counted complete Blood Cells (CBC) such as WBC, Lymphocytes, Monocytes, Granulocytes, RBC, HGB, and HCT of both SAM P6 and SAM P1 during the aging process. Plasma albumin, glucose, alkaline phosphatase, calcium, creatinine, inorganic phosphate, urea concentrations were also measured at the same time. In addition to these, plasma concentrations of cortisol, total T3, and total T4 were analyzed by Chemiluminescent Immunoassay. There were no change in CBC counts of SAM R1 and SAM P6 during this study. Plasma concentratins of albumin and glucose decreased significantly in SAM R1. However, plasma alkaline phosphatases and creatinine concentration in SAM P6 decreased significantly at 16 week after birth comparing to the control. Total T4 levels were siginificantly increased although cortisol and total T3 concentrations were the same in SAM R1 groups. Especially, the after birth of creatinine, alkaline phosphatase, T4 of SAM P6 at 16 week were significantly different form those of SAM R1. At 12 week after birth, pilose antler extract was given 5g/kg/day p.o. for 0, 7, 14, 21, and 30 days each in both SAM R1 and SAM P6. The RBC, HGB, and HCT levels started to increase significantly from 7 days after the dose at SAM P6 only. Total T4 conectrations were elevated gradually during the study although the antler extract administration did not prevent or inhibit the increase in total T4 concentration during the study. Therefore, the elevation of erythrocytes after administration of the extract needs to be studied in future.
Ko, Young-Jin;Kim, Ji Young;Lee, Joongyub;Song, Hong-Ji;Kim, Ju-Young;Choi, Nam-Kyong;Park, Byung-Joo
Journal of Preventive Medicine and Public Health
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v.47
no.1
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pp.36-46
/
2014
Objectives: To evaluate the association between fracture risk and levothyroxine use in elderly women with hypothyroidism, according to previous osteoporosis history. Methods: We conducted a cohort study from the Korean Health Insurance Review and Assessment Service claims database from January 2005 to June 2006. The study population comprised women aged ${\geq}65$ years who had been diagnosed with hypothyroidism and prescribed levothyroxine monotherapy. We excluded patients who met any of the following criteria: previous fracture history, hyperthyroidism, thyroid cancer, or pituitary disorder; low levothyroxine adherence; or a follow-up period <90 days. We categorized the daily levothyroxine doses into 4 groups: ${\leq}50{\mu}g/d$, 51 to $100{\mu}g/d$, 101 to $150{\mu}g/d$, and > $150{\mu}g/d$. The hazard ratios (HRs) and 95% confidence intervals (CIs) were estimated with the Cox proportional hazard model, and subgroup analyses were performed according to the osteoporosis history and osteoporosis-specific drug prescription status. Results: Among 11 155 cohort participants, 35.6% had previous histories of osteoporosis. The adjusted HR of fracture for the > $150{\mu}g/d$ group, compared with the 51 to $100{\mu}g/d$ group, was 1.56 (95% CI, 1.03 to 2.37) in osteoporosis subgroup. In the highly probable osteoporosis subgroup, restricted to patients who were concurrently prescribed osteoporosis-specific drugs, the adjusted HR of fracture for the > $150{\mu}g/d$ group, compared with the 51 to 100 ${\mu}g/d$ group, was 1.93 (95% CI, 1.14 to 3.26). Conclusions: While further studies are needed, physicians should be concerned about potential levothyroxine overtreatment in elderly osteoporosis patients.
Objective: The aim was to study experimentally the effects of Dioscorea bulbifera L. induced by sodium levothyroxine. Methods: Sprague-Dawley rats were separated into four groups. Except for the normal group, the other three were treated with sodium levothyroxine $160{\mu}g/kg$ for 5 days. Among the three groups, two (except the control) were treated with Dioscorea bulbifera L. extract of 0.75g/kg (sample A) or 1.5g/kg (sample B). $T_3-uptake,\;T_3,\;T_4$, TSH, total cholesterol, glucose, ALP, AST, ALT, tree fatty acids, $\beta-lipoprotein$, and change in the serum of rats were measured after medication with solid extract of Radix Scrophulariae. Results: $T_4$ concentration and $T_3-uptake$ level decreased in sample A and B compared to controls. $T_3$ concentration decreased but not statistically meaningful. Considering lipid metabolism, only free fatty acid level was significantly reduced glucose level also significantly decreased in sample B. Serum AST, ALT and ALP levels were slightly elevated but there was no meaning statistically, which doesn't mean Dioscorea bulbifera L. has liver toxicity because the quantity of the extract perhaps couldn't reach the minimal dose causing liver toxicity, which according to an article was 60g. Body weight significantly increased in comparison to controls. Conclusion: These results suggest that Dioscorea bulbiftra L. lowers excess thyroid hormone and increased metabolism, resulting in improvement of hyperthyroid state.
Objectives To evaluate the effect of InsamGobonHwan (IGH) on growth of rats. Methods We divided male Sprague-Dawley rats into 4 groups(IGHE1, IGHE2, IGHE3 and sham group). IGHE1, IGHE2, IGHE3 groups were administered with IGHE water extracts once a day at the dose of 1,000, 500 and 250mg/kg/$10m{ell}$ for 1 week, 2 weeks, and 3 weeks. Sham group was administered with normal saline with using the same method. We measured body weight, amount of body weight increasing, length of femur, serum Growth Hormone(GH), serum Insulin-like Growth Factor-I(IGF-I), serum Thyroid-stimulating Hormone(TSH) and serum testosterone at 1 week, 2 weeks, and 3 weeks of experiment. Results The body weight and the changes of body weight increased significantly in IGHE1 group compared to sham group after 2 and 3 weeks, and in IGHE2 group after 2 weeks. The lengths of the femur increased significantly in IGHE1 group as compared with sham group after 1, 2 and 3 weeks, and in IGHE3 group after 1 week. The level of IGF-I in the serum increased significantly in S1 group as compared tosham group after 1 and 3 weeks, and in IGHE13 group after 3 weeks. The level of TSH in the serum increased significantly in IGHE1group as compared to sham group after 2 and 3 weeks. The level of GH and testosterone in the serum does not change significantly. Conclusions SGT have an effect of promoting growth of rats and might be effect to treat various kinds of growth delay in children.
Purpose: In the theory of traditional medicine, Glenditsia spina(GS) can resolve carbuncle, relive swelling, dispel wind and destroy parasites. This study was designed to investigate the effects of GS on gene expression of ovarian tissue in polycystic ovary syndrome(PCOS) rats. Methods: In this experiment, female rats injected with a single dose of 2 mg estradiol valerate(EV) and GS was given for 5 weeks. The genetic profile for the effects on ovarian tissue in PCOS rats was measured using microarray technique, and the functional analysis on these genes was conducted. Results: 985 genes were increased in control and restored to normal level in GS group. (B), 733 genes were decreased in control group and restored to normal level in GS group. (F). Metabolic pathways related in B group genes were Graft-versus-host disease, Allograft rejection, Autoimmune thyroid disease, Cytokine-cytokine receptor interaction, Small cell lung cancer, Type I diabetes mellitus. Metabolic pathways related in F group genes were Antigen processing and present, Adipocytokine signalling pathway, Focal adhesion, ECM-receptor interaction, Pancreatic cancer, Notch signalling pathway, Tight junction. The network of total protein interactions was measured using cytoscape program, and some key molecules, such as c-Fos, c-Myc, ABL1 related in B group, MAPK8, RASA1, CALR related in F group that can be used for elucidation of therapeutical mechanism of medicine in future were identified. Conclusion: These results suggest possibility of GS as anti-cancer and anti-hyperplasia drug in PCOS. In addition, the present author also suggests that related mechanisms are involved in suppression of proto-oncogene such as c-Fos, c-Myc and ABL1, and in regulation of cell cycle such as RASA1.
Objectives: Perchlorate is an emerging contaminant that is found everywhere, including various foods. Perchlorate is known to disturb the production of thyroid hormones and leads to mental disorders in fetuses and infants, as well as metabolic problems in adults. In this study, we attempted to establish an LC-MS/MS method for measuring perchlorate in dairy products and used this developed method to investigate perchlorate levels in Korean milk and yogurt samples. Methods: The developed method of perchlorate analysis requires a shaker and 1% acetic acid/acetonitrile as the extracting solvent. Briefly, the samples were extracted and then centrifuged (4000 rpm, 1hour), and the supernatant was then passed through a $Envi^{TM}$ Carb SPE cartridge that had been prewashed sequentially with 6 mL of acetonitrile and 6 mL of 1% acetic acid in water. The final volume of the sample extract was adjusted to 40 mL with reagent water and the final sample was filtered through a 0.20-${\mu}m$ pore size PTFE (Polytetrafluoroethylene) syringe filter prior to LC-MS/MS. Results: The average levels of perchlorate in milk and yogurt samples were $5.63{\pm}3.49\;{\mu}g/L$ and $3.65{\pm}2.42\;{\mu}g/L$, respectively. The perchlorate levels observed in milk samples in this study were similar to those reported from China, Japan, and the United States. Conclusions: The exposure of Koreans to perchlorate through the consumption of dairy products was calculated based on the results of this study. For all age groups, the calculated exposure to perchlorate was below the reference of dose (0.7 ${\mu}g/kg$-day) proposed by the National Academy of Science, USA, but the perchlorate exposure of children was higher than that of adults. Therefore, further investigation of perchlorate in other food samples is needed to enable a more exact assessment of exposure of children to perchlorate.
Park, Min-Jae;Kim, Jung-Hyun;Jang, Jung-Chan;Kim, Chang-Ho;Jeong, Jae-Min;Lee, Dong-Soo
Nuclear Medicine and Molecular Imaging
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v.42
no.4
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pp.261-266
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2008
We established a model to calculate radioactive waste from sewage disposal tank of hospitals to optimize the number of patients receiving inpatient radioiodine therapy within the safety guideline in our country. According to this model and calculation of radioactivity concentration using the number of patients per week, the treatment dose of radioiodine, the capacity and the number of sewage tanks and the daily amount of water waste per patient, estimated concentration of radioactivity in sewage waste upon disposal from disposal tanks after longterm retention were within the safety guideline (30 Bq/L) in all the hospitals examined. In addition to the fact that we could increase the number of patients in two thirds of hospitals, we found that the daily amount of waste water was the most important variable to allow the increase of the number of patients within the safety margin of disposed radioactivity. We propose that saving the water amount be led to increase the number of patients and they allow two patients in an already furnished hospital inpatient room to meet the increasing need of inpatient radioiodine treatment for thyroid cancer.
Hu, Chunmei;Yang, Linhan;Wang, Yi;Zhou, Shijie;Luo, Jing;Gu, Yi
Journal of Ginseng Research
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v.45
no.6
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pp.734-743
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2021
Background: The underlying mechanisms of the potential tumor-suppressive effects of ginsenoside Rh2 are complex. N6-methyladenosine (m6A) RNA methylation is usually dysregulated in cancer. This study explored the regulatory effect of ginsenoside Rh2 on m6A RNA methylation in cancer. Methods: m6A RNA quantification and gene-specific m6A RIP-qPCR assays were applied to assess total and gene-specific m6A RNA levels. Co-immunoprecipitation, fractionation western blotting, and immunofluorescence staining were performed to detect protein interactions and distribution. QRT-PCR, dual-luciferase, and ChIP-qPCR assays were conducted to check the transcriptional regulation. Results: Ginsenoside Rh2 reduces m6A RNA methylation and KIF26B expression in a dose-dependent manner in some cancers. KIF26B interacts with ZC3H13 and CBLL1 in the cytoplasm of cancer cells and enhances their nuclear distribution. KIF26B inhibition reduces m6A RNA methylation level in cancer cells. SRF bound to the KIF26B promoter and activated its transcription. SRF mRNA m6A abundance significantly decreased upon KIF26B silencing. SRF knockdown suppressed cancer cell proliferation and growth both in vitro and in vivo, the effect of which was partly rescued by KIF26B overexpression. Conclusion: ginsenoside Rh2 reduces m6A RNA methylation via downregulating KIF26B expression in some cancer cells. KIF26B elevates m6A RNA methylation via enhancing ZC3H13/CBLL1 nuclear localization. KIF26B-SRF forms a positive feedback loop facilitating tumor growth.
Thiago Oliveira Gamba;Fernanda Visioli;Deise Renata Bringmann;Pantelis Varvaki Rados;Heraldo Luis Dias da Silveira;Isadora Luana Flores
Imaging Science in Dentistry
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v.54
no.1
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pp.1-11
/
2024
Purpose: This study was conducted to investigate the safety of dental imaging in pregnant women with respect to fetal health. Materials and Methods: Searches were conducted of the PubMed, Scopus, and Web of Science databases in May 2023. The inclusion criteria encompassed cross-sectional and longitudinal studies that focused on the analysis of diagnostic dental imaging in pregnant women, as well as studies utilizing phantoms to simulate imaging examinations. The exclusion criteria consisted of reviews, letters to the editor, book chapters, and abstracts from scientific conferences and seminars. Results: A total of 3,913 articles were identified. Based on a review of the titles and abstracts, 3,892 articles were excluded, leaving 21 articles remaining for full-text review. Of these, 18 were excluded, and 4 additional articles were included as cross-references. Ultimately, 7 articles underwent quantitative-qualitative analysis. Three retrospective studies were focused on pregnant women who underwent dental imaging procedures. The remaining 4 studies utilized female phantoms to simulate imaging examinations and represent the radiation doses absorbed by the uterus or thyroid. Conclusion: Few dental radiology studies have been conducted to determine the safe radiation threshold for pregnant women. Additionally, the reviewed articles did not provide numbers of dental examinations, by type, corresponding to this dose. Dental imaging examinations of pregnant women should not be restricted if clinically indicated. Ultimately, practitioners must be able to justify the examination and should adhere to the "as low as diagnostically acceptable, being indication-oriented and patient-specific" (ALADAIP) principle of radioprotection.
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