• Progress in Medical Physics
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• v.28 no.4
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• pp.197-206
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• 2017

We develop guidelines for the quality assurance of radiation treatment planning systems (TPS) by comparing and reviewing recommendations from major countries and organizations, as well as by analyzing the AAPM, ESTRO, and IAEA TPS quality assurance guidelines. We establish quality assurance items for acceptance testing, commissioning, periodic testing, system management, and security, and propose methods to perform each item within acceptable standards. Acceptance includes tests of hardware and network environments, data transmission, software, and benchmarking as specified by the system supplier, and apply the IAEA classification criteria. Commissioning includes dosimetric and non-dosimetric items for assessing TPS performance by applying the AAPM classification criteria and the latest technical items from the IAEA. Periodic quality assurance tests include daily, weekly, monthly, yearly, and occasional items by applying the AAPM classification criteria. System management and security items include the state and network connectivity of TPS, periodic data backup, and data access security. The guidelines for TPS quality assurance proposed in this study will help to improve the safety and quality of radiotherapy by preventing incidents related to radiotherapy.

• Journal of Periodontal and Implant Science
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• v.46 no.3
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• pp.207-217
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• 2016

Purpose: The aim of this study is to analyze and visualize the distribution of patients visiting the periodontology department at a dental college hospital, using a geographic information system (GIS) to utilize these data in patient care and treatment planning, which may help to assess the risk and prevent periodontal diseases. Methods: Basic patient information data were obtained from Dankook University Dental Hospital, including the unit number, gender, date of birth, and address, down to the dong (neighborhood) administrative district unit, of 306,656 patients who visited the hospital between 2007 and 2014. The data of only 26,457 patients who visited the periodontology department were included in this analysis. The patient distribution was visualized using GIS. Statistical analyses including multiple regression, logistic regression, and geographically weighted regression were performed using SAS 9.3 and ArcGIS 10.1. Five factors, namely proximity, accessibility, age, gender, and socioeconomic status, were investigated as the explanatory variables of the patient distribution. Results: The visualized patient data showed a nationwide scale of the patient distribution. The mean distance from each patient's regional center to the hospital was $30.94{\pm}29.62km$ and was inversely proportional to the number of patients from the respective regions. The distance from a regional center to the adjacent toll gate had various effects depending on the local distance from the hospital. The average age of the patients was $52.41{\pm}12.97years$. Further, a majority of regions showed a male dominance. Personal income had inconsistent results between analyses. Conclusions: The distribution of patients is significantly affected by the proximity, accessibility, age, gender and socioeconomic status of patients, and the patients visiting the periodontology department travelled farther distances than those visiting the other departments. The underlying reason for this needs to be analyzed further.

• Journal of Korean Neurosurgical Society
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• v.47 no.2
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• pp.128-133
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• 2010

Objective : The secondary verification of Leksell Gamma Knife treatment planning system (LGP) (which is the primary verification system) is extremely important in order to minimize the risk of treatment errors. Although prior methods have been developed to verify maximum dose and treatment time, none have studied maximum dose coordinates and treatment volume. Methods : We simulated the skull shape as an ellipsoid with its center at the junction between the mammillary bodies and the brain stem. The radiation depths of the beamlets emitted from 201 collimators were calculated based on the relationship between this ellipsoid and a single beamlet expressed as a straight line. A computer program was coded to execute the algorithm. A database system was adopted to log the doses for $31{\times}31{\times}31$ or 29,791 matrix points allowing for future queries to be made of the matrix of interest. Results : When we compared the parameters in seven patients, all parameters showed good correlation. The number of matrix points with a dose higher than 30% of the maximal dose was within ${\pm}\;2%$ of LGP. The 50% dose volume, which is generally the target volume, differs maximally by 4.2%. The difference of the maximal dose ranges from 0.7% to 7%. Conclusion : Based on the results, the variable ellipsoid modeling technique or variable ellipsoid modeling technique (VEMT) can be a useful and independent tool to verify the important parameters of LGP and make up for LGP.

• Korea Journal of Hospital Management
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• v.5 no.2
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• pp.59-77
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• 2000

There are increasing interest and need for information on health care consumer with the significance of hospital marketing and strategic planning being increasingly emphasized. This study was conducted to investigate the criteria for selection of medical facilities according to the characteristics of cataract patient. In order to investigate the major factors affecting selection of medical facilities by cataract patient, 300 subjects of cataract patients who was operated at 5 various medical care facilities were selected. Questionnaires are given on March, 2000 and 273 questionnaires were collected. Two types of hospitals(Eye Hospital and University hospital) were combined and analyzed. The main results of this research is as following; 1. In general characteristics of the patients, the variables shown statistically a significant difference between Eye Hospital and University Hospital; The6 educational level and average income are significantly higher in University Hospital Patient. 2. University Hospitals were preferred by the factors of social relationship, social reputation. The critical factors in reference for Eye hospital were kindness, service speed and convenience. This study can be used as a baseline data for marketing planning of hospital management. But the study may be limited in that the results cannot be generalized due to its small sample size and not being able to reflect demographic variables and life style. Further studies to investigate the hospital consumer behavior will be needed.

• Journal of The Korea Institute of Healthcare Architecture
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• v.14 no.2
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• pp.25-34
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• 2008

The purpose of this study was to spatial organization feature and area composition of the over 500beds general hospital that will be expected construct in Seoul, Gyeonggi-do area after 2000year. From this study, we can suggest architectural planning for the efficiency operating of emergency medical facilities that can be used as preliminary data. The Spatial organization of emergency medical facilities are categorize into 4 session as medical examination and treatment, diagonosticradiology, staff, public and the others. We can find spatial organization system and area composition that compare area composition of 6 hospital the subject of research in a emergency medical facilities. The result of this study were as follows : spatial distribution of its field, grasping of spatial organization factor and recognize its merits and demerits should be researched in advance. Through this kind of recognizing emergency system, realistic medical local and condition architectural planning for spatial organization will be operate.

• Journal of The Korea Institute of Healthcare Architecture
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• v.3 no.5
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• pp.107-122
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• 1997

According as the aging procese have been high, last stage patient become more important. Therefore, todays hospice ward of hospital is glandized, specified too. However, its study is few performed in domestic and its architectural planning data is few obtained. Therefore, this study aims to represent the standard of the architectural planning of the hospice ward in hospital. As its method, the present conditions, the interview with staffs, space programs of 4 hospice ward were investigated and analyzed, add to 2 free standing hospice were selected, theirs architectural space programing were studied.

• Journal of The Korea Institute of Healthcare Architecture
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• v.23 no.3
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• pp.71-80
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• 2017

Purpose: At the moment prevention and treatment of animal related diseases is becoming a social concern as the demand for animal increases. Furthermore, The design of the veterinary medical teaching hospital are even more complex because they have to accommodate medical program for animal and education and research program for students. However, there are a few experience and useful guidelines for the planning of the veterinary medical teaching hospital. So it is not easy for the regional hub universities to work out the proper plan for the construction of the veterinary medical teaching hospital for their own. This study has been started in order to provide basic informations for the planning of Korean veterinary medical teaching hospital. Methods: Interview to veterinarian, intern and employee of the veterinary medical teaching hospital and Field surveys to veterinary medical teaching hospital in Korea have been conducted for the data collection. The drawings of three universities of veterinary medical teaching hospital have been analysed and diagramed. Results: The result of this study can be summarized into three points. The first one is that the veterinary medical teaching hospital spaces are divided into five areas (ambulatory care, central medical care, hospitalization, education and research, operations and support) and each area is divided independently and connected properly. The second one is that the veterinary medical teaching hospital differs from hospital in the detailed space plan in the sense that the animal is a patient. The third one is that each hospital has different operating practices and programs according to local conditions Implications: It is meaningful as a basic source of veterinary medical teaching hospital design in the future.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2005.04a
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• pp.47-50
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• 2005

The aim of radiosurgery cures a patient to deliver the lower dose at the normal organ and the higher dose at the tumor. Therefore accuracy of the dose is required to gain effect of radiosurgery in surgical planning. In this paper, we developed the methods of target approximation for a fast treatment planning. Nominally, the stereotactic radiosurgery(SRS) using Linac and Gamma knife produces spherical dose distribution through circular collimators using multiple arcs and 201 holes on semi-spherical helmet by $^{60}Co$. We developed an automatic radiosurgical plan about spherical packing arrangement. To automatically plan the SRS, new planning methods based on cylinder and cube structure for target shaping was developed. This approach using heuristic and stochastic algorithm is a useful radiosurgical plan without restrictions in the various tumor shapes and the different modalities.

• Korean Journal of Digital Imaging in Medicine
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• v.6 no.1
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• pp.19-23
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• 2003

In recent years, many computer systems that are used for patient diagnostic and treatment purpose s are being introduced within hospitals. Therefore, being in a position to manage the hospital entirely, efforts to integrate their own unique system into one have started. A system values humans and creates the surrounding atmosphere into one which maximizes the abilities of individuals. For this, a scientific integration management operation system is required. The type of system that is demanded due to this requirement is an ERP(Enterprise Resource Planning) system. Lately, even the hospital industry is beginning to show interest in efficient administrative methods. To deliver more predominant medical services, hospitals are trying to introduce scientific administrative methods, whose superiority were proven in enterprises, to the operation system of the hospital organization. ERP values humans over systems, and within a superior system, emphasizes the efficiency of the organization. This sort of process does not just evaluate and manage the working abilities of individuals, but provides an advanced working environment that increases the abilities of members within the organization by fold. Therefore, this research estimates through questionnaires and introductive cases how the introduction of ERP may change the work of customers within hospitals such as the radiologic technology department, and how it may also change the environment of medical services, thus striving to create a radiologic technology department that will not fall behind the times.

• Proceedings of the Korean Society of Medical Physics Conference
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• 2006.08a
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• pp.89-89
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• 2006