계획된 행위이론을 적용한 방사선학과 대학생들의 방사선 방어용 보호장구 착용에 대한 분석

노지숙(Ji-Sook Noh),이병훈(Byung-Hoon Lee),배상열(Sang-Yul Bea),박형수(Hyung-Su Park),류소연(So-Yen Ryu),박종(Jong Park) 한국콘텐츠학회 2011 한국콘텐츠학회논문지 Vol.11 No.9

본 연구는 의료기관에서의 임상실습을 마친 방사선학과 대학생들을 대상으로 방사선 방어용 보호 장구 착용행위에 어떠한 영향을 미치는지에 대하여 알아보고자 연구되었다. 계획된 행동이론에서 제시하는 ‘태도' ‘주관적 규범' ‘지각된 행위통제' 및 ‘의도' 를 연구 틀에 적용하여 보호 장구 착용행위와 관련된 요인을 측정하였다. 대상자는 광주, 전남지역의 방사선학과가 있는 대학의 방사선학과 대학생 중, 임상실습을 마친 총230명에게 자기기입식 설문조사를 실시하여 192부를 최종 대상으로 하였다. 로지스틱 회귀분석을 통하여 분석한 결과 보호 장구 착용은 학년(비차비: 11.60, 95%신뢰구간: 2.473-54.415)이 낮을수록, 실습병원의 규모(비차비: 2.80, 95% 신뢰구간: 1.337-5.886)가 작을수록, 태도 점수(비차비: 0.957, 95%신뢰구간: 0.933-0.98)가 낮을수록, 지각된 행위통제의 점수(비차비: 1.063, 95%신뢰구간:1.02-1.10)가 높을수록 통계적으로 유의하였다. 이상의 결과를 통해 계획된 행동이론과 관련하여 방사선학과 대학생들의 임상실습에서 방사선 방어용 보호 장구의 착용률을 높이기 위해서는 태도와 지각된 행위 통제와 같은 요인들을 고려한 교육 프로그램의 개발이 필요할 것으로 생각된다. This research aims at investigating the factors that affects the wearing of the nuclear protection equipment by radiology students. We measured the factors related to the wearing of the nuclear protection equipment based on the theory of planned behavior (TPB). We collected 192 survey records from 230 radiology students in Kwang-ju and Chun-nam providence who finished the clinical training. Based on Logistic Regression analysis, we found that the wearing of the nuclear protection equipment is statistically more probable as the level of study is lower, the scale of practicing hospital is smaller, the attitude rating is lower, and the rating of perceived behavioral control is higher. We argue that the development of educational program considering factors like the perceived behavioral control is required to enhance the degree of wearing the nuclear protection equipment in the clinical training of college students.

대퇴골의 전장검사 시 stitching method의 적용에 관한 유용성 연구

노지숙(Ji-Sook Noh),정지훈(Ji-Hoon Jung),김성길(Sung-Kil Kim),정명진(Myung-Jin Jung) 대한방사선과학회 2011 방사선기술과학 Vol.34 No.2

대퇴골의 전장검사 시 조사야의 넓이와 필름이나 검출기 등의 크기의 한계로 인하여 대각선 방향으로 위치를 잡는다 하여도 모두 포함되지 못하는 경우가 있다. 본 연구에서는 대퇴골의 골첨부와 골단부가 포함되도록 두 번 촬영을 하여 얻어진 영상을 융합하는 방식을 적용하여 검사한 결과에 대한 유용성에 대해 알아보고자 하였다. 2007년 8월부터 2009년 11월까지 광주지역의 한 대학병원 응급실에 내원한 환자 중 대퇴골 검사 시 고식적인 DR방식과 SM방식을 이용한 검사방법 모두를 시행한 경험이 있는 방사선사 30명을 대상으로 설문조사를 하였고, 같은 기간에 대퇴골검사를 시행한 환자의 영상의 질 평가는 영상의학과 전문의 2명과 10년 이상 근무한 방사선사 6명에 의해 대퇴경의 축소여부, 무릎관절의 회전여부, 대퇴골의 포함정도에 따라 20개의 영상을 평가하였다. 설문조사한 결과는 검사시간, 검사자수, 체력적 소모, 재 촬영률, 환자의 불편 등에 대한 항목에서 SM방식의 검사에서 모두 높은 점수를 받았고, 통계적으로 유의함을 알 수 있었으며(p < 0.001), 영상의 평가에서도 고식적인 DR방식보다 SM방식의 영상이 높은 평가점수를 받았다. 본 연구의 결과로 대퇴골 검사 시 SM방식이 고식적인 DR방식에 비하여 유용함을 알 수 있었다. The Full-length examination of the femur sometimes does not show all of the femur because of the limited width in collimator and size of detectors although it is located in the diagonal direction. Aim of this study is to identify usefulness of the method of combining images which obtained from two radiographic images containing the femoral head and condyle respectively. Our group interviewed 30 radiological technologists who used both palliative DR method and SM method in their examinations of the femur of patients who were carried to the emergency rooms in Gwang-ju city from August 2007 to November 2009. We evaluated twenty images according to the contraction of femoral neck, turning of knee joints and inclusion of the femur. The examination were performed by two radiologists and six radiological technologists who have more than ten years of career. The results are as follows: SM method was graded with higher score for examination time, number of examiners, emaciation, retake and patients’ discomfort (p< 0.001) while the. SM method was scored higher than the palliative DR method in the palliative DR method for examination of long bone.

Neck CTA 검사에서 환자의 신체적 특성과 HU값의 상관관계에 관한 연구

정지훈(Ji hun Jung),정명진(Myung jin Jung),전재두(Jae doo Jeon),노지숙(Ji sook Noh) 대한CT영상기술학회 2013 대한CT영상기술학회지 Vol.15 No.1

목적: Neck CTA검사에서 조영제 주입 후 내경동맥의 근위부와 원위부에 도달하는 조영제의 HU값을 조사하여, 환자의 성별, 연령, 신장, 체중, 체질량 지수, 심박동수, 혈압에 따른 HU값 변화와의 상관관계를 알아보고자 한다. 대상 및 방법: 2012년도 7월부터 2013년 1월까지 광주광역시 C 대학병원에 Neck CTA 검사를 위해 내원한 환자 중에서 영상판독결과 질환이 없는 환자 164명을 후향적으로 조사하였다. 조영제를 초당 5ml의 속도로 70ml를 먼저 주입 후 생리식염수를 초당 5.5ml의 속도로 50ml, 총120ml를 주입하였다. 설정해 놓은 역치값에 도달하면 자동적으로 검사를 시작하는 Auto Bolus Tracking 기법을 이용하였으며, cranio-caudal 방향으로, pitch를 높여서 검사를 진행하였다. Curved MPR 기법을 이용하여 내경동맥과 척추동맥을 영상화하여, 내경동맥의 근위부에서 원위부까지 각각 3회씩 HU값을 측정하였고, 환자들의 체중, 신장, BMI, 혈압, 심박동수의 인자들과 HU값의 평균비교를 위해 상관관계분석을 시행하였고, p<0.05인 경우에 통계학적으로 유의한 것으로 보았다. 결과: 내경동맥의 근위부(HU1)에서 측정된 HU값의 평균은 512.11±85.14, 내경동맥의 중앙부(HU2)에서 측정된 HU값의 평균은 553.99±98.75, 내경동맥의 원위부(HU3)에서 측정된 HU값의 평균은 483.73±82.05, 세 부위의 HU값 평균은 516.61±81.08이다. 환자의 인자와 HU값의 상관관계분석에 의하면 성별은 양의 상관관계를 가지는 것으로 나왔고(p<0.05), 체중과 신장, BMI, 수축기압은 음의 상관관계를 가지는 것으로 나왔다. 이완기압, 심박동수는 상관관계를 갖지 않는 것으로 나왔다 결론: 본 연구는 환자의 신체적 특성(성별, 나이, 혈압, 심박동수, 체중, 신장, BMI)에 따른 내경동맥에서의 HU값의 상관관계를 분석하였고, 환자의 신체적 특성 중 내경동맥에 조영된 정도의 차이가 발생하게 하는 인자로는 성별, 체중, 신장, BMI, 수축기압이 통계적으로 유의함을 알 수 있었다. 체중, 신장, BMI, 수축기압이 높은 환자들의 경우에는 조영제의 주입속도와 양을 높여주고, 여성인 경우에는 조영제 주입속도와 양을 줄여줌으로써 CTA의 최적의 영상을 제공할 수 있을 것으로 기대된다. 향후, Neck CTA 검사 시 상관관계에 놓여 있는 신체적 특성 인자들을 고려한 조영제 주입 프로토콜과 검사방법의 개발과 연구가 진행 되어져야 할 것으로 생각 한다. Purpose: Neck CTA test after the start of contrast injection of the internal carotid artery proximal and distal to the HU value of the contrast medium to reach the survey, the patient’s gender, age, height, weight, body mass index (BMI), heart rate, blood pressure, according to the correlation of the change in HU value andto evaluate Materials & Method: July 2012 to January 2013 University Hospital, Gwangju C Neck CTA examination for a patient who presented disease image interpretation results of 164 patients who were retrospectively reviewed. 50ml, 120ml, 70ml first injection of the contrast medium at a rate of 5ml per second after the normal saline at a rate of 5.5ml per second was injected. Start automatically checks have set the threshold value is reached Auto Bolus Tracking Technique, cranio-caudal direction by raising the pitch inspection was conducted. Curved MPR technique using each in the proximal portion of the internal carotid artery until the distal internal carotid and vertebral arteries, imaged by three times the value of HU were measured factors, the patients’ weight, height, BMI, blood pressure, heart rate, and HU values correlation analysis was performed for the average comparison, looked to be statistically significant if p <0.05. Result: Measured at the proximal portion of the internal carotid artery (HU1) average HU value of the average HU value of the central portion of the internal carotid artery (HU2) measured at 512.11 ± 85.14, 553.99 ± 98.75, measured HU values of the internal carotid artery in the distal (HU3)the average of the three parts of the average HU value 516.61 483.73 ± 82.05, ± 81.08. According to the analysis of the HU values of the correlation factors and patient’s gender, as having yielded a positive correlation (p <0.05), and negatively correlated with body weight and height, BMI, systolic to have emerged.Diastolic pressure, heart rate suggests that he does not have a correlation. Conclusion: The present study, according to the physical characteristics of the patient (gender, age, blood pressure, heart rate, weight, height, BMI) HU value of the correlation analysis of the internal carotid artery in the angiography of the internal carotid artery on the physical characteristics of the patient, and the degree ofdifference that occurs as a factor, sex, weight, height, BMI, systolic blood pressure was found to be statistically significant. Are expected to be able to provide optimal imaging by CTA if the patients’ weight, height, BMI, systolic blood pressure, high amount of contrast injection speed and improves the contrast injection rate and reduce the amount of women if Future, the contrast medium injection protocol and Neck CTA examination lies in the correlation between physical characteristics factors in considering the progress of research and development testing methods to be considered.

대한전산화단층기술학회지에 게재된 논문의 연구동향

전재두(Jae Doo Jeon),노지숙(Ji Sook Noh) 대한CT영상기술학회 2009 대한CT영상기술학회지 Vol.11 No.1

Purpose Korean society of computed tomographic technology foundation 10 anniversaries arrived and analyzing paper that is collected to journal that is drawn until 1999~ 2008 year, did market number and research institution distribution change comparative analysis. Analyze to paper’s area of study and research subject, wish to offer to pabulum so that CT technology connection research in presence at a clinical developed forward more may can be propeled. Materials and methods Divide in non full-text and full-text treatise and diagnosed 306 paper that is collected to journal to grasp CT technology journal’s research tendency. Investigated CT technology journal memebership’s treatise 178 parties that is come to full text except 128 which outside lecture contents and abstract are collected. Grades of estimation of collected treatise that do not first because do by 5 points measure that do well 1 point, first 5 Jeomeurohas each year treatise average mark hydrate. Results Among whole paper 306, member’s paper was 282 and this was 92.2% of whole paper. Also, non-membership’s paper was 24. There were much differences in publication paper number to area, and 2000 year scientific papers were lowest point to 3.4 points in estimation of flue each book of full text paper and scientific paper of 2008 year was best point to 4.8 points. Evaluation average score of whole scientific paper was 4.35 points. Specially, because 64 multi-channel MDCT’s of cardiovascular region are distributed all over the country, research is lively. Also, 13 papers was recorded in radiation dose management research and 12 papers was recorded in contrast media connection research. Conclusion Need to supplement some to resuscitate as journal of Korea society of computed tomography technology that can be recognized in Korea research foundation. Should be made out according to form to require in Korea society of computed tomography technology. There is necessity that is activated and paper number control as is light of paper announcement in each area. Become not being Investigations of authoritative science TFT organization, consolidation of treatise quality, edit committee function consolidation, diversification of treatise subject, new medical technology diffusion, clinical report etc. contribute people health and diagnosis clashed to social ethics. It is thought subject that must solve first that raise Korea society of computed tomography technology’s upgrade as Journal that exclude non-memebership’s paper is recognized by Korea society of computed tomography technology’s full text journal, and is consisted of membership’s paper.

외상에 의한 흉곽 골절에 유용한 다절편 CT의 재구성 영상

김승국(Seung Kook Kim),노지숙(Ji Sook Noh),전재두(Jea Doo Jeon),전진만(Jin Man Jeon),김동훈(Dong Hoon Kim) 대한CT영상기술학회 2007 대한CT영상기술학회지 Vol.9 No.1

Purpose This article evaluate the usefulness of three-dimensional reconstructive images using multi detector computed tomography (MDCT) in thoracic traumatic patients visiting emergency room clinics for out-patients. Materials and methods 76 patients with fractures of 105 patients who visited our emergency room complaining of thoracic trauma were analyzed retrospectively. All patients performed thoracic MDCT and three-dimensional reconstructive images were taken. Fractures were confirmed by axial CT, clinical information, whole body bone scan, and multi planar reformation images. Plain x-ray was analyzed by fractured sites in a blind comparison of two radiologists’ readings, and then that finding was compared with them of axial CT scans and three-dimensional reconstructive images. Results The fracture sites were rib (n=68), sternum (n=14), clavicle (n=6), scapula (n=3), spine (n=5) and combined fractures (n=14). Plain x-ray and axial CT scans had correspondency of 0.555 for rib fractures. Axial CT scans and three-dimensional reconstructive images had 0.952. For sternal fracture, those were 0.692 and 0.928 each. Axial CT scans and three-dimensional reconstructive images showed sensitivities for rib and other fractures, 94 % and 91 % and for sternal fracture, 93 % and 100 % each. Three-dimensional reconstructive image had high sensitivity in the diagnosis of sternal fracture especially. Conclusion While evaluating thoracic trauma at emergency room, three-dimensional reconstructive image was useful to diagnose extent of fracture easily and very sensitive to detect sternal fracture.

MDCT를 이용한 경부동맥 촬영에서 IV 선택위치에 따른 영상 비교

전재두(Jea Doo Jeon),노지숙(Ji Sook Noh) 대한CT영상기술학회 2007 대한CT영상기술학회지 Vol.9 No.1

Purpose The MDCT images in Angiography for shoulder lateral and subclavian and brachiocephalic vein always hae been resulted poor image qulities due to the high concentration of contrast medium using rapid bolus injector. Materials and Methods We sampled 413 people from January to December, 2006 who had been executed Neck-Brain Angiography who took IV routes on upper and lower extremities in C University Hospital and evaluated 100 people randomly among each of them. The program which We used for this research is CARE dose Program used as a real time dose modulation program of SIE!\1ENS Sensation 16 MIXT apparatus. Results By executing 2 examinations of both Neck-Brain Angiography at one time injection, we could give patients more economical and time saving advantages due to the reduction of contrast medium and could execute two examinations simultaneously and offer their diagnostic results faster. By the same reason -we could get both individual images of Neck Angiography and Brain Angiography and get higher diagnostic valuable images by taking IV route on lower extremities rather than upper extremities. Conclusion By executing 2 examinations of both Neck-Brain Angiography simultaneously during only one time injection of contrast medium, we could not only offer patients less exposed dose and more economical and time saving advantages, but also found that we could get higher diagnastic valuable images at the time of lower extremity IV site angiography rather than the one of upper extremity and finally that will be considered as a more useful technique in the future Angiography examinations.

비 조영증강 전산화단층촬영 검사시 관전압 변화에 따른 요산석과 비요산석의 HU변화에 관한 연구

정명진(Myung Jin Jung),노상호(Sang Ho Noh),문창운(Chang Woon Moon),노지숙(Ji Sook Noh),김성길(Sung Kil Kim) 대한CT영상기술학회 2014 대한CT영상기술학회지 Vol.16 No.2

서 론 : 요로결석의 성분에 대한 정보는 효과적인 치료방법을 결정하는데 있어 중요한 역할을 하며, 요로결석의 분쇄정도(fragility)를 예측 가능하게 한다. 이에 본 저자는 요로결석의 HU값 측정시 관전압에 따른 요산석과 비요산석의 HU값 변화에 대해 알아보고자 한다. 대상 및 방법 : 작은 플라스틱 병(Plastic Bottle) 안에 요로결석을 삽인 후 인체와 비슷한 돈육을 이용하여 실험팬텀을 제작하였다. 640-Slice MSCT(Auquilion ONE, Toshiba Medical Center, Japan)의 Volume scan 방식을 이용하여 촬영하였고, 얻어진 영상에서 각 관전압에 따른 요로결석의 HU값을 측정하였다. 수집된 자료의 통계분석은 각 요로결석의 관전압에 따른 HU값 차이의 유의성을 알아보기 위해 대응표본 T-검정을 시행하였고, p<0.01인 경우에 통계학적으로 유의한 것으로 보았다. 결 과 : 요산석의 HU값은 135kV일 때 412.67±17.49, 100kV일 때 401.50±29.46, 80kV일 때 401.00±24.88로 관전압이 감소함에 따라 HU값은 일정하게 나타났고, 비요산석의 HU값은 135kV일 때 442.19±16.86, 100kV일 때 624.52±26.30, 80kV일 때 826.05±32.15로 관전압이 감소함에 따라 HU값이 증가하였다. 요산석의 경우에 관전압의 변환에 따른 HU값은 통계적으로 유의한 차이를 보이지 않았고(P>0.01), 비요산석의 경우에 80kV와 135kV, 100kV와 135kV, 80kV와 100kV의 HU값은 통계적으로 유의한 차이를 보였다(P<0.01). 135kV에서는 요산석과 비요산석의 HU값이 통게적으로 유의한 차이를 보이지 않았으며(P>0.01), 100kV와 80kV에서는 요산석과 비요산석의 HU값의 차이가 통계적으로 유의한 차이를 보였다(P<0.01) 결 론 : 비 조영증강 전산화단층촬영시 비요산석의 경우에는 관전압이 감소할수록 요로결석의 HU값이 상승함을 알 수 있었고, 요산석의 경우에는 관전압이 증가할수록 HU값이 감소함을 알 수 있었다. 요로결석을 위한 비 조영증강 전산화단층촬영 시에는 100kV 또는 80kV의 저관전압을 이용해야 요로결석의 성분을 진단하는데 도움이 될 것으로 생각된다. Purpose : Information on the components of urinary tract effective therapy plays an important role in determining how and to urinary tract prediction enables the fragility. HU measurement of urinary stone tube voltage according to the value of the Non-uric acid Uric acid changes in the value of the HU to evaluate. Materials and method : Plastic Bottle sapin in the human body, similar to a urinary tract stones using pork was produced in the phantom experiment. 640-Slice MSCT (Aquilion ONE, Toshiba Medical Center, Japan) using the Volume scan approach was taken. Urinary stones according to the image of each tube voltage was measured HU values, the statistical analysis of the data collected for each tube voltage of urinary stones according to the significance of differences in HU values to see performed by paired sample test, p<0.01 If one looked to be statistically significant. Result : Uric acid HU values are 135kV, 412.67±17.49, 100kV, 401.50±29.46, 80kV, 401.00± 24.88, when the tube voltage decreases to a constant value appeared HU, Non-Uric acid HU value is 135kV, 442.19±16.86, 100kV, 624.52±26.30, 80kV, 826.05±32.15, the tube voltage is decreased to HU values increased along. Uric acid in the case of a tube voltage conversion value of the HU, there were no statistically significant differences(P>0.01), Non-uric acid in the case of 80kV and 135kV, 100kV and 135kV, 80kV and 100kV HU value of a statistical significant difference(P<0.01). 135kV is Uric acid and Non-uric acid HU value showed no significant difference(P>0.01), 100kV and 80kV Uric acid and Non-uric acid HU difference was statistically significant difference respectively. (P<0.01) Conclusion : When a non-enhanced spiral computed tomography(CT) in the case of Non-uric acid in the urinary tract tube voltage decreases to that of HU values were rising, Uric acid in the case of HU values increased tube voltage decreased. For urinary stones during non-enhanced spiral computed tomography(CT) of 100kV or 80kV Lower tube voltage should be used for the components of Urinary stone believed to be helpful in diagnosis.

64 Slice MDCT와 심근관류 SPECT, 심초음파를 이용한 심실 기능 지표의 비교

정명진(Myung Jin Jung),전재두(Jae Doo Jeon),노지숙(Ji Sook Noh),김동훈(Dong Hun Kim) 대한CT영상기술학회 2009 대한CT영상기술학회지 Vol.11 No.1

Purpose Wish to search each equipment correlation great damage about ejection fraction, end diastolic volume, end systolic volume that express capacity and function of left ventricle that use multi detector computed tomography(MDCT). Recognized about end systolic phase and suitable section choice of end diastolic phase that is basic information of all-important EDV and ESV in functional analysis. Materials and methods From 560 patients who underwent cardiac MDCT in the Kwangju city C univesity hospital from january, 2008. to january, 2009, We enrolled 39 patients who underwent echocardiogarphy, myocardial perfusion SPECT during the same period for this study. Left ventricular end systolic volume(EDV), left ventricular end diastolic volume(EV) and ejection fraction(EF) were functional analyzed. Results Average volume(47.00±21.46ml, 41.80±13.81ml for 30% and 40% phase, 120.40±34.6ml, 132.40±29.13ml, 137.20±29.83ml for 70%, 80%, 90% phase), average EF(62.41%, 64.93%, 65.91% for 30%(ES), 70%~90% phase(ED), 5.27%, 68.12%, 69.12% for 40%(ES), 70%~90%(ED)) showed significant difference between each phase. Comparing correlation for each parameters between each groups. Average EF(r=0.88, p<0.00001 for MDCT & SPECT, r=0.83, p<0.00001 for MDCT & ECHO, r=0.81, p <0.00001 for SPECT & ECHO) showed high relevance. average EDV(r=0.88, p<0.00001 for MDCT & SPECT, r=0.79, p<0.00001 for MDCT & ECHO, r=0.86, p<0.00001 for SPECT & ECHO) showed high relevance. Average ESV(r=0.88, p<0.00001 for MDCT & SPECT, r=0.79, p<0.00001 for MDCT & ECHO, r=0.86, p<0.00001 for SPECT & ECHO) showed high relevance. Conclusion Qantiative assessment of left ventricular volume and function using 64 slice MDCT Showed high relevance compared with myocardial perfusion SPECT & echocardiogarphy. Hereafter, by technological development of MDCT, if coronary artery stenosis’ diagnosis and left ventricular function analysis consist abuzz, is expected to enforce test more simply because it is to patient.

CT검사에서 환자정보관리 프로그램을 이용한 조영제 주입 후 모니터링 시간 변경에 따른 피폭선량 감소에 관한 연구

나유리(Yu Ri Na),전진만(Jin Man Jeon),정명진(Myung Jin Jung),노지숙(Ji Sook Noh) 대한CT영상기술학회 2012 대한CT영상기술학회지 Vol.14 No.1

목적 CT검사 시 조영제 주입 후 모니터링 시간에 따라 환자의 피폭선량에는 많은 차이가 있다. 본 연구에서는 조영제 주입 후 모니터링 시간과 모니터링 과정에서의 피폭선량을 환자정보관리 프로그램에 기록하고 추후 검사 시 이를 참고하여 모니터링 과정에서 시간과 mAs를 변경하여 검사한 후 선량 감소가 되는지 알아보고자 한다. 대상 및 방법 2010년 6월부터 2011년 6월까지 두부 CT검사와 흉부 CT검사를 시행하는 환자를 대상으로 환자정보관리프로그램에 조영제 주입 후 모니터링 시간과 모니터링 과정에서의 환자의 피폭선량을 기록하였다. 환자정보관리 프로그램에 입력된 환자수는 총 150명이었으며 추적 시행한 환자수는 총 50명으로 두부CT와 흉부CT에 각각 25명이었다. 장비는 64절편 MDCT(Philips brilliance 64, Philips Medical System, Cleaveland, USA)를 이용하였으며 추적검사 전 두부CT의 경우 관전압 120kVp와 선량 10mAs를 사용하였고, HU값은 300으로 하고 2초 간격으로 스캔하였다. 흉부CT는 관전압 120kVp와 전량 30mAs를 사용하였고, HU값은 150으로 하고 2초 간격으로 스캔하였다. 추적검사 시 두 검사 모두 선량을 장비가 할 수 있는 최소 mAs로 변경하였다. 추적 검사를 시행한 환자 50명에 대해 전후 모니터링 시간과 선량을 조사 분석하였다. 결과 두부CT를 추적 검사한 환자에서 조영제 주입 후 모니터링 시간을 변경하여 검사하였을 때 변경 전ㆍ후 시간은 평균 10.84s 감소하였고 선량은 34.944mGy에서 3.776mGy 평균 31.168mGy 감소하였다. 흉부CT를 추적 검사한 환자에서는 변경 전ㆍ후 시간은 평균 9.80s 감소하였고 선량은 18.396 mGy에서 4.8 mGy로 평균 13.596mGy 감소하였다. 결론 환자정보관리 프로그램을 이용한 추적환자의 CT검사에서 조영제 주입 후 모니터링 시간을 변경하여 검사함으로써 환자의 피폭을 줄일 수 있었다. I. Purpose CT scan after injecting contrast agents for monitoring patients over time, there dare many differences in the radiation dose. In this study, after injecting contrast medium in the process of monitoring time and monitoring the radiation dose to the patient records and information management program for future inspection and monitoring in the course of time and refer to it by changing the mAs reduction in dose is then scanned to investigate. II. Materials and Method June 2010-June 2011 head CT scan and chest CT scans performed in patients with a patient information management program after injecting contrast medium in the process of monitoring time and monitoring the patient1s radiation dose was recorded. Patient Information Management program, a total of 150 people. head CT and chest CT of 50 people each had 25 people. Equipment is 64-slice MDCT(Philips brilliance 64, Philips Medical System, Cleaveland, USA) was used track before the test head CT dose, 120 kvp and 10 mAs was used, HU 300, and every two seconds to scan were 120 kvp with a dose chest CT was used 30 mAs, HU values, and 150 were scanned every two seconds. Both the two tests at follow-up doses can be the instrument was changed to the minimum mAs. Around 50 people who underwent. monitoring for tracking time and dose were investigated. III. Result Track head CT scan after injecting contrast agents in patients who monitored the test by changing the time before the change when, hours after the dose is decreased by an average of 10.84sec at 34.944mGy to 3.776mGy average fell 31.168 mGy. Chest CT scan to track changes in a patient before and after an average of 9.80 s 18.396mGy dose was reduced from an average of 4.8mGy was reduced 13.596 mGy. IV. Conclusion Using patient information management programs track the patient’s CT scan after contrast agent injection monitoring by changing the amount of time by checking the patient’s dose could be reduced.

IV route에 따른 Neck CTA 영상의 적정성에 관한 고찰

정명진(Myung Jin Jung),전재두(Jae Doo Jeon),정지훈(Ji Hoon Jung),박상록(Sang lok Park),전진만(Jin Man Jeon),노지숙(Ji Sook Noh) 대한CT영상기술학회 2012 대한CT영상기술학회지 Vol.14 No.2

목적 본 연구에서는 Ⅳ route에 따라 Neck CTA검사 시 Ⅳ route 확보에 대한 문제점의 해결과 높은 진단영상 획득을 위한 프로토콜을 제시하고자 한다. 대상 및 방법 2011년도 12월부터 2012년 2월까지 광주광역시 C 대학병원에 Neck CTA 검사를 위해 내원한 환자 중에서 영상판독결과 질환이 없는 환자를 대상으로 하였고, Ⅳ route를 상지혈관에 확보한 환자 23명과 하지혈관에 확보한 환자 30명을 연구대상으로 조사하였다. Curved MPR 영상에서 ICA부위에 HU값을 측정하였고, 측정한 HU값의 측정오류를 최소화하기 위하여 한 연구자가 근위부에서 원위부까지 각각 3회씩 측정하여, 이들 HU값의 평균과 표준편차를 구했다. 평가방법은 영상의학과 전문의 2명, 방사선사 3명에 의해 평가하였으며, 조영제에 의한 인공물이 혈관에 미치는 정도와 조영증강 정도에 따라 최고점수 5점을 부여하였고, 나머지는 차례로 1점 단위로 하위점수를 부여하여 평가하였다. 통계분석은 독립표본 t-test 검정을 시행하였고, p<0.05인 경우에 통계학적으로 유의한 것으로 보았다. 결과 상지에 혈관을 확보한 군의 HU 평균값은 463.36±94.77, 하지에 혈관을 확보한 군의 HU 평균값은 372.98±74.32로 나타났고, 영상 평가한 결과 상지에 혈관을 확보한 환자의 검사영상에서 4.14±0.81점, 하지에 혈관을 확보한 환자의 검사영상에서 4.18±0.65점으로 나타났다. HU값과 영상평가에 따른 독립표본 t-test 검정을 한 결과 통계적으로 유의하였다 (p<0.05). 결론 Neck CTA 검사 시 상지에 혈관을 확보 시에도 Dual injector를 이용한 조영제와 생리식염수를 투여하고 검사방향을 머리에서 발쪽으로 높은 피치로 검사함으로써, 견측 부위에서의 조영제로 인한 인공물 발생을 줄일 수 있어 진단적으로 양질의 영상을 얻을 수 있었다. I. Purpose This study aims to present a protocol to attain solutions to problems involving Ⅳ route in Neck CTA and acquire diagnostic images according to Ⅳ routes. II. Meterial and Methods For the purpose, this study analysed patients who came to C university hospital for Neck CTA from December 2011 to February 2012 and had no diseases as a result of image reading. The subjects were categorized in the following: 23 patients with Ⅳ route at their upper extremity and 30 ones with Ⅳ route at their lower extremity. HU values were measured at the ICA of the curved MPR images and to minimize errors in the HU values, this study measured them from the proximal to the distal three times for a subject to obtain means and standard deviations. Two radiologists and three radiological technologists participated in the evaluation, and a maximum of five points were given according to the degrees that contrast media affected blood vessels and the intensity of contrast enhancement, and sub-points were given to the rest. For a statistical analysis, a t-test was conducted and in case of p<0.05, it was suggested that it was significant. III. Result The mean HU values of the group with Ⅳ route at the upper extremity were 463.36±94.77 and those of the group with Ⅳ route at the lower extremity were 372.98±74.32. As a result of evaluating the images, the points of the former subjects were 4.14±0.81 and those of the latter subjects were 4.18±0.65. It was discovered that the results of the HU values and the t-test were statistically significant(p<0.05). IV. conclusions In the Neck CTA, to secure IV routes at the upper extremity, contrast media and saline were injected with a use of a dual injector and an examination was done from the head to the leg to decrease occurrence of artificial things due to contrast media and to attain good-quality images.