• Title/Summary/Keyword: dose of prescription

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Clinical investigation of child dose of herb medicine (소아의 한약복용에 관한 임상적 실태 조사)

  • Seo, Jung-Min;Lee, Sang-Gon;Hwang, Sun-Yi;Kim, Sang-Chan;Wang, Hyang-Ran;Jo, Sung-Eon;Baek, Jung-Han
    • The Journal of Pediatrics of Korean Medicine
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    • v.20 no.3
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    • pp.33-50
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    • 2006
  • Objectives : Oriental medicine has set the no herb medicamentous dose for child, on the other hand the western medicine has it standardizing of age, weight or dimension of body. Therefore, we aimed to research the herb medicamentous dose for child being in being used in clinic. Methods : We made up a question of the oriental medical doctors of the master's and doctor's course in ○○ university. Results : 1. Child dose of herb medicine a time likes this. 1 pack is written prescription most at children patients under 1 year. 1 pack and 2 packs are written prescription most at children patients over 1 under 2. 2 packs are written prescription most at children patients over 2 under 3. 4 packs are written prescription most at children patients over 3 under 4. 10 packs are written prescription most at children patients over 8 under 14. Dose of herb medicine written prescription at children patients over 5 under 8 is in decentralization from 2 to 10 packs. 2. 2 or 3 times are most in a number of taking medicine a day. 3. 3 days are common in period of taking medicine under 5, over 10 days are common over 5. 4. It is necessary to regulating child dose of herb medicine.

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Determining the Optimal Dose Prescription for the Planning Target Volume with Stereotactic Body Radiotherapy for Non-Small Cell Lung Cancer Patients

  • Liu, Xi-Jun;Lin, Xiu-Tong;Yin, Yong;Chen, Jin-Hu;Xing, Li-Gang;Yu, Jin-Ming
    • Asian Pacific Journal of Cancer Prevention
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    • v.17 no.5
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    • pp.2573-2577
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    • 2016
  • Objective: The aim of this study was to determine a method of dose prescription that minimizes normal tissue irradiation outside the planning target volume (PTV) during stereotactic body radiotherapy (SBRT) for patients with non-small cell lung cancer. Methods: Previous research and patients with typical T1 lung tumors with peripheral lesions in the lung were selected for analysis. A PTV and several organs at risk (OARs) were constructed for the dose calculated; six treatment plans employing intensity modulated radiotherapy (IMRT) were produced, in which the dose was prescribed to encompass the PTV, with the prescription isodose level (PIL) set at 50, 60, 70, 80, 90 or 95% of the isocenter dose. Additionally, four OARs around the PTV were constructed to evaluate the dose received in adjacent tissues. Results: The use of higher PILs for SBRT resulted in improved sparing of OARs, with the exception of the volume of lung treated with a lower dose. Conclusions: The use of lower PILs is likely to create significant inhomogeneity of the dose delivered to the target, which may be beneficial for the control of tumors with poor conformity indices.

Quality Assurance on Dose Distribution of Ir-192 Line Source (Ir-192 선 선원의 선량분포에 관한 품질보증)

  • Kim, Jong-Eon
    • Journal of radiological science and technology
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    • v.30 no.1
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    • pp.33-38
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    • 2007
  • The propose of this study is a verification of the correct calculation of the dose around source and the prescription dose of Ir-192 source in the plato treatment planning system. The source and orthogonal coordinates for lateral direction and those for the anterior posterior direction were drawn on a A4 paper and then input into the system. The prescription dose was prescribed to two points with radius 1 cm in the direction of polar angle $90^{\circ} and $270^{\circ} from the center of the source. The doses of prescription point and dose points acquired from the treatment planning system were compared with those from manual calculation using the geometry function formalism derived by Paul King et al. In this analysis, the doses of prescription point were exactly consistent with each other and those of dose points were obtained within the error point of 1.85%. And the system of accuracy was evaluated within 2% of tolerance error. Therefore, this manual dose calculation used for the geometry function formalism is considered to be useful in clinics due to its convenience and high quality assurance.

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A Study on the Dose of Prescription in Shanghanlun (상한잡병론(傷寒雜病論)의 약물제량(藥物劑量)에 관한 고찰)

  • Shin, Heung-Mook
    • The Journal of Korean Medicine
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    • v.20 no.3 s.39
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    • pp.3-8
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    • 1999
  • This study was carried out to investigate the dose of prescription in Shanghanlun. To this end, literature research and a survey of several herbal medicines have been done. As a result, the weight of 1 liang (兩) is determined to be about 15g. Furthermore, we find that Jung-Kyung Jang, who compiled Shang-hanlun, used a great quantity of herbal medicines to treat critical conditions of iIInesses. Therefore application of Shang-hanIun s prescriptions according to the various conditions of patients must have changed the quantity of dosage.

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A Comparision of Mghr Prescription to Doses at Ponts A and B in Intracavitary Radiotherapy of Cervix Cancer (자궁경구암(子宮頸口癌) 강내조사치료시(腔內照射治療時) A점(點) B점(點) 선량계산방법(線量計算方法)과 mghr 단위(單位) 방법(方法)의 비교(比較))

  • Park, Charn-Il;Ha, Sung-Whan;Kang, Wee-Saing
    • Journal of Radiation Protection and Research
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    • v.6 no.1
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    • pp.31-33
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    • 1981
  • The 42 patients with carcinoma of the cervix, performed intracavitary radiotherapy, were analysed the doses at points A and B comparing to the mghr prescription. The doses at points A and B were calculated by PC-12 computer planning system. Correlation coefficienty between doses at points A and B and the mghr prescription are 0.82 (p<0.001) and 0.90 (p<0.001) respectively. The slope of the point A line is 0.70 and the slope of the point B is 0.21. Therefore, the dose at point A is approximately 3/4 the mghr prescription and the dose at point B is approximately 1/4 the mghr precription.

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Inhibitory effects of the Juglans sinensis Walnut Ethanol Extract on Carbon Tetrachloride-induced hepatic fibrosis in Rats (호두인 에탄올 추출물의 사고화탄소 유도 간섬유화 억제 효과)

  • Jang Seong Il;Lim Chang Kyung;Ryu Jin Duk;Kim Hui Soo;Yun Yong Gab
    • Journal of Physiology & Pathology in Korean Medicine
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    • v.17 no.5
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    • pp.1264-1269
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    • 2003
  • The inhibitory effects of the Juglans sinensis walnut ethanol extract (JSWE) on carbon tetrachloide (CCl₄)-induced fibrosis, serum transaminases (GOT and GTP), hepatic glutathione (GSH), serum pro-inflammatory cytokines (IL-1β and IL-6) were investigated in rats. JSWE significantly inhibited on CCl₄-induced fibrosis in dose-dependent manner. Moreover, JSWE significantly inhibited on the serum levels of GOT, GTP, IL-1β, and IL-6 in dose-dependent manner in CCl₄-induced fibrosis rat. However, JSWE markedly increased the production of hepatic GSH in a dose-dependent manner. These results show that JSWE may explain some known biological activities of Juglans sinensis walnut including their anti-fibrotic and anti-inflammatory effects, and is of considerable benefit in the treatment for live diseases.

Cyberknife Dosimetric Planning Using a Dose-Limiting Shell Method for Brain Metastases

  • Yoon, Kyoung Jun;Cho, Byungchul;Kwak, Jung Won;Lee, Doheui;Kwon, Do Hoon;Ahn, Seung Do;Lee, Sang-Wook;Kim, Chang Jin;Roh, Sung Woo;Cho, Young Hyun
    • Journal of Korean Neurosurgical Society
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    • v.61 no.6
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    • pp.753-760
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    • 2018
  • Objective : We investigated the effect of optimization in dose-limiting shell method on the dosimetric quality of CyberKnife (CK) plans in treating brain metastases (BMs). Methods : We selected 19 BMs previously treated using CK between 2014 and 2015. The original CK plans ($CK_{original}$) had been produced using 1 to 3 dose-limiting shells : one at the prescription isodose level (PIDL) for dose conformity and the others at low-isodose levels (10-30% of prescription dose) for dose spillage. In each case, a modified CK plan ($CK_{modified}$) was generated using 5 dose-limiting shells : one at the PIDL, another at intermediate isodose level (50% of prescription dose) for steeper dose fall-off, and the others at low-isodose levels, with an optimized shell-dilation size based on our experience. A Gamma Knife (GK) plan was also produced using the original contour set. Thus, three data sets of dosimetric parameters were generated and compared. Results : There were no differences in the conformity indices among the $CK_{original}$, $CK_{modified}$, and GK plans (mean 1.22, 1.18, and 1.24, respectively; p=0.079) and tumor coverage (mean 99.5%, 99.5%, and 99.4%, respectively; p=0.177), whereas the $CK_{modified}$ plans produced significantly smaller normal tissue volumes receiving 50% of prescription dose than those produced by the $CK_{original}$ plans (p<0.001), with no statistical differences in those volumes compared with GK plans (p=0.345). Conclusion : These results indicate that significantly steeper dose fall-off is able to be achieved in the CK system by optimizing the shell function while maintaining high conformity of dose to tumor.

Feasibility Study of Mobius3D for Patient-Specific Quality Assurance in the Volumetric Modulated Arc Therapy

  • Lee, Chang Yeol;Kim, Woo Chul;Kim, Hun Jeong;Lee, Jeongshim;Huh, Hyun Do
    • Progress in Medical Physics
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    • v.30 no.4
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    • pp.120-127
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    • 2019
  • Purpose: This study was designed to evaluate the dosimetric performance of Mobius3D by comparison with an aSi-based electronic portal imaging device (EPID) and Octavius 4D, which are conventionally used for patient-specific prescription dose verification. Methods: The study was conducted using nine patients who were treated by volumetric modulated arc therapy. To evaluate the feasibility of Mobius3D for prescription dose verification, we compared the QA results of Mobius3D to an aSi-based EPID and the Octavius 4D dose verification methods. The first was the comparison of the Mobius3D verification phantom dose, and the second was to gamma index analysis. Results: The percentage differences between the calculated point dose and measurements from a PTW31010 ion chamber were 1.6%±1.3%, 2.0%±0.8%, and 1.2%±1.2%, using collapsed cone convolution, an analytical anisotropic algorithm, and the AcurosXB algorithm respectively. The average difference was found to be 1.6%±0.3%. Additionally, in the case of using the PTW31014 ion chamber, the corresponding results were 2.0%±1.4%, 2.4%±2.1%, and 1.6%±2.5%, showing an average agreement within 2.0%±0.3%. Considering all the criteria, the Mobius3D result showed that the percentage dose difference from the EPID was within 0.46%±0.34% on average, and the percentage dose difference from Octavius 4D was within 3.14%±2.85% on average. Conclusions: We conclude that Mobius3D can be used interchangeably with phantom-based dosimetry systems, which are commonly used as patient-specific prescription dose verification tools, especially under the conditions of 3%/3 mm and 95% pass rate.

A Study on Application of Gypsum Main Blended Prescription From Dongeuibogam (동의보감(東醫寶鑑) 중 석고(石膏)가 주약(主藥)으로 배오(配伍)된 방제(方劑)의 활용(活用)에 대한 고찰(考察))

  • Oh, Whang;Lee, Jang-Cheon
    • Herbal Formula Science
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    • v.15 no.1
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    • pp.1-19
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    • 2007
  • This study was investigated to make sure the range of Gypsum treatment, the nature of disease, the pathology and the dosage of it in Dongeuybogam. The following conclusions were reached through investigations on the prescriptions that use Gypsum as a key ingredient. The Gypsum blended prescriptions are utilized in 23 fields of treatment such as cold, head. ect. Prescriptions that use Gypsum as the main ingredient are used commonly in the treatment of cold, head disease, fever, skin disease, diabetes, stroke, ophthalmic disease, jaundice, ENT disease and dental disease. The Gypsum is used for nature of disease which of cold, heat(fever), summer heat, phlegm, malfunction of liver, malfunction of liver and kidney, heat of stomach, malfunction of spleen and fever of stomach. The clinical dosage of Gypsum has ranged at a wide variety of amount from 1.6g to 16g per dose with 4g ${\sim}$ 8g being the typical dose for most treatment. The Gypsum is applied as a fundamental prescription with several herb remedies for the pathology.

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Comparison of dose-variation in skin due to Set-up error in case of radiation therapy for left breast using Volumetric Modulated Arc Therapy(VMAT) (좌측 유방에 대한 용적 변조 회전 방사선 치료 시 자세 오차로 인한 피부 선량)

  • Kwon, Yongjae;Park, Ryeunghwang;Kim, Seyoung;Jung, Dongmin;Baek, Jonggeol;Cho, Jeonghee
    • The Journal of Korean Society for Radiation Therapy
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    • v.33
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    • pp.55-62
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    • 2021
  • Purpose: This study aims to contribute to the reduction of complications of breast cancer radiation therapy by analyzing skin dose differences due to Set-up error. Materials and Method: Pseudo breast was produced using a 3D printer, applied to the phantom, and images were acquired through CT. Treatment plan was carried out that the PTV, which contains 95% of the prescription dose, could be more than 95% of the volume, so that Dmax did not exceed 107% of the prescription dose. The Set-up error was evaluated by applying ±1mm/±3mm/±5mm to the X-axis, Y-axis, and Z-axis. Results: The dose-variation in skin due to Set-up error was approximately 106% to 123% compared to prescription dose, and the highest dose in skin was 49.24 Gy at 5mm Set-up error in the lateral direction of the X-axis. More than 107% of the prescription dose was the widest at 6.87 cc in skin lateral. Conclusions: If a Set-up error occurs during left breast cancer VMAT, a great difference in skin dose was shown in the lateral direction of the X-axis. If more effort is made to align the X-axis of the breast treated during CBCT registration, the dose-variation of skin will be reduced.