방사선사의 개인적 요인이 직무스트레스원에 영향을 주는 관련성 분석

정홍량(Hong-Ryang Jung),김정구(Jeong-Koo Kim),임청환(Cheong-Hwan Lim),김명수(Myeong-Soo Kim),권대철(Dae-Cheol Kwon),이만구(Man-Koo Lee) 대한방사선과학회(구 대한방사선기술학회) 2005 방사선기술과학 Vol.28 No.1

This study is aimed at analyzing the relationship between personal factors of radiological technologists and their job stressors. For this aim, a survey was conducted by means of 890 questionnaires from the middle of July to the end of August 2003 to the subjects of radiological technologists who are working for 44 general hospitals in 16 cities and provinces across the country. The results of the survey could be summed up as follows: 1. The biggest stressor that affects a radiological technologist personally under the working situation turned out to be position, job satisfaction and physical symptom(p<0.001), while job satisfaction and physical symptom also played an important role in personal relationship(p<0.001). 2. In terms of job conflicts, colleagues, immediate seniors, job satisfaction and physical symptoms appeared to exercise great impact(p<0.001), As for job autonomy, age, position and job satisfaction were known to be heavily influential(p<0.001). 3. With regard to job load, job satisfaction and behavioral symptom turned out to have great influence while, in job stability, position and job satisfaction seemed to be immensely influential (p<0.001). The present study has a limit in that it covers only radiological technologists who are working at the 3rd reference hospitals but excludes those who are working at the first and second reference hospitals. The findings, however, are surely believed to be able to serve as basic data to improve the medical service quality as they will help reduce the stressors of and enhance mental and physical health for radiological technologists who play important roles as teammates with expertise in the medical field. These outcomes could also be referred to in future studies in this area. 전국 16개 시도의 44개 3차 의료기관에 근무하는 방사선사의 직무환경에서 발생되는 스트레스원과 개인적인 관련요인을 분석한 결과는 다음과 같다. 근무환경에서 스트레스원에 영향을 주는 개인적인 관련요인은 직위, 직무만족도, 신체화 증상이고, 역할관련에서는 직무만족도와, 신체적 증상이며, 직무안정성에 있어서는 직위와 직무만족도가 많은 영향을 주는 요인으로 나타났다. 직무자율성에서 영향을 주는 요인은 연령, 직위, 직무만족도이고, 직무부담에서는 직무만족도, 행동적 증상이며, 직무갈등에서는 직장동료, 직속상관, 직무만족도, 신체적 증상이 영향을 많이 주고 있는 것으로 나타났다.

전산화단층촬영검사실 방사선사의 방사선피폭 방어행위에 영향을 미치는 요인 분석

김기정,정홍량,홍동희,Kim, Ki-Jeong,Jung, Hong-Ryang,Hong, Dong-Hee 대한방사선과학회 2018 방사선기술과학 Vol.41 No.6

This study was conducted to analyze factors Influencing Protective Behavior against Radiation Exposure using questionnaires for 231 radiological technologists working in Computed Tomography(CT) examination room with high radiation dose in diagnostic radiology field. Statistical analysis of the collected data revealed that the reasons for partially shielding the examination part in the CT scan were the lack of protective equipment, securing of radiation justification, being annoying and maybe not being harm to adults in order. It was also revealed that the variables influencing the protective behavior were protective behavior against radiation harm, self-efficacy, protective environment, organization culture, protective knowledge and protective instrument in order. The higher the radiological protective environment(${\beta}=0.245$) and the lower the radiological protective knowledge(${\beta}=-0.034$), the more influential the protective behavior against radiation harm was. In this study, it was shown that non examination parts were not shielded in the CT scan. Therefore, it is necessary to improve the level of protective environment, to cultivate knowledge to improve the protective behavior against radiation harm and to have an intervention strategy for concrete action.

Non Breathe Hold Technique를 이용한 MR 담도계조영술에 대한 고찰 : Prospective Acquisition Correction(PACE)기법과 Respiration Trigger Gating(RTG) 기법의 비교

구은희,정홍량,임청환,권대철,조정근,이만구,Goo, Eun-Hee,Jeong, Hong-Ryang,Im, Cheong-Hwan,Kweon, Dae-Cheol,Jo, Jeong-Keun,Lee, Man-Koo 대한디지털의료영상학회 2008 대한디지털의료영상학회논문지 Vol.10 No.1

Recently, MR Cholangiography used mainly bu controlling of patient's breathing. There is breathing hold techniques to get images within shopt time and gating technique adjusted to respiration cycle for high resolution image. In this study, the aim of this experiment is to know on clinical usefulness compared with PACE and RTG thchniques. This study's period is from 2006 in November to 2007 in January. A total of 21 patients investigated at MAGNETOM Sonata 1.5T (SIEMENS Erlangen) with use of 12ch body coil. MR acquisition protocol used 3D turbo spin echo coronal sequence. Scan parameters applied to potimal setting in use as gating techniques, respectively. Analysis of consuming timing evaluated with rapidness. As analysis of quantity, the common bile duct, gall bladder measured in signal intensities, then these data were calculated by signal to noise ratio and contrast to noise ratio. Qualitative analysis, experienced 2radiologists and 3 RTs were evaluated into 3groups about artifact, accuracy of lesions, sharpness of the common bile duct or gall bladder. As a result of analysis, when compared to PACE, consuming time of the RTG took less than PACE, On both CNRs and SNRs, PACE technique was slightly high values than RTG(p<0.05). Qualitative analysis' results, discrimination of lesions in the common bile duct, gall bladder get a significance level in both RTG and PACE techniques but presence's artifact of breathing and pulsation highly demonstrate in PACE techniques. In conclusion, both PACE and RTG methods at MRCP provided prominently clinical information for the common bile duct, gall bladder. If machines have not limitation with performance, induction of breathing holding also will help getting diagnistic quality.

A Study on the Mitigation of the Exposure Dose Applying Bolus Tracking in Brain Perfusion CT Scan

김기정,정홍량,임청환,홍동희,심재구,유인규,Kim, Ki-Jeong,Jung, Hong-Ryang,Lim, Cheong-Hwan,Hong, Dong-Hee,Shim, Jae-Goo,You, In-Gyu The Society of Digital Policy and Management 2014 디지털융복합연구 Vol.12 No.3

급성기 허혈성 뇌졸중 증상이 있는 뇌 관류 CT 검사를 시행한 환자를 대상으로 장비사가 제시한 고정 시간 기법(Fixed time technique)과 조영제 추적 기법(Bolus tracking technique)을 비교하여 환자의 피폭선량을 분석하고자 하였으며, 조영제 추적 기법의 유용성과 최적의 조영증강 구간을 구현하는 Time graph를 알아보기 위한 것이다. 환자에서는 PCT의 $CTDI_{VOL}$은 고정시간기법에서 431.72mGy, Bolus tracking에서 323.61mGy로 측정되었고, DLP값은 고정시간기법에서 $1243.47mGy{\cdot}cm$, Bolus tracking에서 $932mGy{\cdot}cm$로 측정되었다. Time graph는 고정시간기법에서 다양하게 나타났으나, Bolus tracking 기법에서는 최적의 Time graph를 얻을 수 있었으며, 뇌 관류 CT검사 시 Bolus tracking기법을 적용하여 피폭선량을 25% 정도 감소시킬 수 있었다. This study was conducted to analyze the patient's exposed dose targeting the patients who had acute ischemic stroke symptoms and CT brain perfusion scan, by comparing fixed time technique and bolus tracking technique which was provided by the manufacturer and to identify the Time graph to implement the usability of contrast medium's tracking technique the best contrast enhancement intervals. $CTDI_{VOL}$ of PCT in patient appeared to be 431.72mGy in fixed scan delay protocol, whereas 323.61mGy in Bolus tracking technique. The value of DLP appeared to be $1243.47mGy{\cdot}cm$ in fixed scan delay protocol, whereas $932mGy{\cdot}cm$ in Bolus tracking technique. Time graph appeared to be various in fixed scan delay protocol, whereas the optimal time graph could be obtained in Bolus tracking. The exposure dose could be reduced by 25% applying Bolus tracking technique when taking brain perfusion CT scan.

조직 내 삽입용 바늘을 이용한 자궁경부암의 강내치료에 관한 연구

조정근(Jung-Keun Cho),정홍량(Hong-Ryang Jung),임청환(Cheong-Hwan Lim),김정구(Jeong-Koo Kim),이만구(Man-Koo Lee) 대한방사선과학회(구 대한방사선기술학회) 2006 방사선기술과학 Vol.29 No.2

  ICRU 38의 권고에 따른 치료계획과 PTV를 토대로 한 치료계획을 세워 환자의 움직임을 고려하여 설정한 종양 용적(이하 PTV라 표기) 전체를 치료하고 주변 정상조직에 선량을 최소화하는 방안에 대해 연구하고자 하였으며, 본 연구는 국립암센터 방사선종양학과에서 2002년 1월부터 2003년 2월까지 방사선치료와 항암화학 치료를 동시에 시행한 30명의 자궁경부암 환자를 대상으로 하였다. 병기의 분포는 각각 stage ⅠB 1명, ⅡA 3명, ⅡB 19명, ⅢA 3명, ⅢB 3명, Ⅳ 1명이었다. 모든 환자에 대해 방사선치료를 시행하기 전에 MRI를 시행하였으며 MR 영상에서 원발종양용적(GTV: Gross Tumor Volume, 이하 GTV라 표기)의 최대 직경이 17명의 환자에서 4㎝ 이하이었고, 12명은 4~6㎝, 1명은 6㎝ 이상이었다.<BR>  연구 결과 PTV 치료계획을 통해 잔류종양의 크기가 작은 경우 불필요하게 방사선이 조사되는 용적을 줄이면서(p<0.0001) 최적의 선량분포를 만들어 낼 수 있지만 종양의 크기가 큰 경우 오히려 전체 종양을 포함하는 치료계획을 수립할 때 주변 정상조직에 불필요하게 많은 선량이 투여되게 된다. 이러한 이유는 Fletcher Williamson Applicator의 구조상 일부분의 방사선 강도를 탄력적으로 조절하는데 한계가 있기 때문인 것으로 사료된다.<BR>  본 연구에서는 applicator의 한계를 극복하고 최적의 선량분포를 얻기 위하여 Fletcher Williamson Applicator에 조직내 삽입용 바늘 4개를 종양의 크기가 큰 10명의 환자 중 기하학적으로 바늘의 삽입이 불가능한 1명의 환자를 제외하고 9명의 환자에 대해 가상으로 삽입하여 선량의 변화를 조사하였다. 그 결과 Virtual 치료계획이 PTV 치료계획뿐 아니라 ICRU 치료계획에 비해 100% 등선량 용적(p=0.0608, p=0.0607) 및 PTV 이외의 정상조직에 불필요하게 조사되는 용적(p=0.0162, p=0.008)을 현저히 감소시킬 수 있는 것으로 나타났다.   Based on the data of cervical cancer patients who were treated by the radiotherapy with concurrent chemotherapy at the radiation oncology department of National Cancer Center from January 2002 to February 2003, we have studied the method recommended by ICRU 38 to maximize the prescription dose to the planing target volume (PTV) with minimizing the dose to surrounding normal organs. Clinical stage of the patients are 1 patient for stage ⅠB, 3 patients for ⅡA, 19 patients for ⅡB, 3 patients for ⅢA, 3 patients for ⅢB and 1 patient for Ⅳ. All patients took the MRI before treatment and the maximum size of the gross tumor volume were under 4cm for 17 patients and from 4㎝ to 6cm for 12 patients and above 6㎝ for 1 patient. The results show that while the irradiated volume can be reduced with optimized dose distribution using PTV treatment planning (p<0.0001) when the remained tumor size is small, the surrounding normal organs will receive unnecessarily large dose when the irradiated tumor volume is relatively large. This is because there is some limitation in controling the intensity of radiation in Fletcher Williamson Applicator. To overcome the limit of applicator and to achieve the optimal dose distribution, we have virtually applied 4 needles with Fletcher Williamson Applicator for 10 patients who have relatively large tumor and studied the change in dose distribution before and after application. The results show that this new virtual treatment plan reduces the volume covered by 100 % isodose (p=0.0608, p=0.0607) and reduces the dose of normal organs (p=0.0162, p=0.008). This evidence suggest that this method is superior than the currently used method such as PTV treatment and ICRU treatment.

CHESS 기법을 이용한 지방소거 경추 자기공명영상에서 자화감수성 인공물을 줄이기 위한 연구

임우택(Lim Woo-Taek),정홍량(Jeong Hong-Ryang) 한국콘텐츠학회 2014 한국콘텐츠학회 종합학술대회 논문집 Vol.2014 No.11

병원규모에서 PACS 도입 계획과 영상의학과 장비 운영에 관한 분석

석종민(Jong-Min Seok),정홍량(Hong-Ryang Jung),임청환(Cheong-Hwan Lim),김정구(Jeong-Koo Kim),박정규(Jeong-Kyu Park) 한국콘텐츠학회 2008 한국콘텐츠학회논문지 Vol.8 No.12

본 연구는 500병상 규모의 병원에서 PACS 도입 시 준비 작업 및 제안서에 포함 되어야 할 항목과 의료장비 도입 전 검토조서의 제시로 장비 도입 전 수익성 및 운용 부서에서 계획서에 제시 된 예상수익을 근거로 하여 장비의 이용도와 수익성을 조사하여 고가의료장비의 구입 원가, 이용도 등을 분석하였다. 연구대상 병원에서 PACS 도입 시 수가로 인하여 수익이 발생되는 것으로 나타났고 의료장비 구입 방법은 임차 방식으로 기간은 3년에서 5년으로 나타났으며, 수익은 2년 정도이면 투자비용을 상회하여 수익이 발생 될 것으로 예상되었다. 병원의 PACS를 도입 운영에 있어서 의료장비 구매 금액은 영상의학과의 운영에서 발생되는 수익을 근거로 할 때 투자비용은 약 1.9년 정도이면 투자금액을 회수 할 수 있을 것으로 예상되었으며 영상의학과의 재촬영 검사의 감소와 필름 및 현상 정착액을 구입하지 않아 운영비를 절감할 수 있는 것으로 나타났다. 또한, 실질적인 수익 증가 외에도 병원 마케팅 차원에서 병원의 위상 향상, 직원들의 업무절감 등에 의한 업무 환경개선 또는 업무 스트레스 감소 등 병원 직원의 업무 만족도 증가로 인한 병원의 서비스 향상에도 기여하는 것으로 나타났다. 이와 같은 결과 병원규모에서 PACS 도입 시 의료장비의 예상 수익을 작성하고 진료업무의 기여도 및 구매 후에도 수익 등을 비교 분석하여 의료장비 도입 전 제안서 작성과 도입 후 효율적인 장비 운영 계획을 수립해야 할 것으로 사료되었다. This research examined use rate and profitability of equipment in hospital scale with about 500 beds to present data including to review before introducing PACS with the checklist included in preparation and proposal based on expected profit suggested by operation department and cost and use rate of the expensive medical equipment were analyzed. It was proved that profit was generated in the research subject hospital if PACS is introduced. Three to five year of lease is proper for the purchase method of medical equipment. Profit after two year of use will surpass investment cost and generate clear profit. Based on the profit generated from operation of radiology department, the purchase amount to introduce PACS at the hospital will be retrieved after about 1.9 years for the investment. The number of reshoot test at radiology department will be decreased and film, development, and fixer will not be necessary to buy so the operation cost will be reduced. Moreover, other than actual profit increased, the hospital can improve its reputation and employees can reduce their works and get better working environment with less stress. Their job satisfaction will be increased so they can improve service quality and it is good for marketing strategy of the hospital. As a result of this research, it was proved that the small and general hospital should have expected profit with introduction of PACS and analyze its contribution to treatment service and profit after the purchase. Then. the hospital should make a proposal for introduction of the medical equipment and establish effective operation plan.

방사선검사의 의무기록에 관한 요구도 분석

홍동희(Dong-Hee Hong),임청환(Cheong-Hwan Lim),임우택(Woo-Taek Lim),주영철(Young-Cheol Joo),정홍량(Hong-Ryang Jung),김은혜(Eun-Hye Kim),윤용수(Yong-Su Yoon),정영진(Young-Jin Jung),최지원(Ji-Won Choi),정성훈(Sung-Hun Jeong),박명환(Myeo 대한방사선과학회(구 대한방사선기술학회) 2021 방사선기술과학 Vol.44 No.5

The purpose of this study was to discuss the required items and feasibility of medical records of radiological examinations performed by radiological technologists at medical institutions. An online survey was conducted to a total of 10,000 radiation-related workers, of which 1,026 (10.3%) responded. As a research method, self-made questionnaires were used. The online survey was conducted from September 10 to September 20, 2021 for the survey period. For response data, a Chi-square test was performed according to demographic characteristics using SPSS 27.0 version (IBM Inc., Chicago, Ill, USA), and it was judged to be significant when the P value was less than 0.05. The reliability of the questionnaire response was found to be Chronbach α=0.933. More than 90% of the medical records related to radiological examinations are necessary, and they answered that a curriculum, remuneration curriculum, and legal system for medical records should be prepared. More than 90% of the respondents agreed with the proposal of the Radiological Technologist Independent Act for legal preparation, and most of the information required for medical records is currently recorded in DICOM images. According to the demographic characteristics, the medical record requirement for radiological examination, curriculum, continuing education, and legislation were found to be higher with higher education and higher with longer working experience. In addition, most of the radiology departments showed a high demand for medical records, so most of them responded positively to the medical records requirements for radiological examinations. This study analyzed the medical record requirements for radiological examinations, and as shown in the results, medical record requirements for radiological examinations was found that most radiological technologists felt need for the new law and supported it. In addition, if the information recorded in the DICOM image is used, it is considered that medical records could be easily prepared without additional work by the radiological technologists.

폐쇄성수면무호흡증 환자에 있어서 수면다원검사 및 Videofluoroscopy의 수술적 인자와의 연관성

김기정(Kim Ki-Jeong),정홍량(Jung Hong-Ryang) 한국콘텐츠학회 2015 한국콘텐츠학회 종합학술대회 논문집 Vol.2015 No.5

두부 CT 영상획득을 위한 ASIR의 정량적 평가

김기정(Kim Ki-Jeong),정홍량(Jeong Hong-Ryang) 한국콘텐츠학회 2014 한국콘텐츠학회 종합학술대회 논문집 Vol.2014 No.11