자체 개발한 하악거상 기구를 활용한 소아 REVERS WATER'S View의 유용성

김강환,손순룡,김광수,홍선숙,이관섭,Kim, Kang-Hwan,Son, Soon-Lyong,Kim, Kwang-Soo,Hong, Sun-Suk,Lee, Kwan-Sup 대한디지털의료영상학회 2013 대한디지털의료영상학회논문지 Vol.15 No.2

This study is to provide clinical data when reverse-water's-view was carried out about pediatric who did not communicate by applying self-development jaw lift tool. This study were conducted in a subject of 23 children who examined revers-water's-view from 2013 July 6 to 2013 August 5 at our hospital. Two group time which were carried out revers-water's with tool and without tool were measured. also, Image of two group were evaluated. Evaluation data obtained by measuring the average difference were analyzed by independent-t-test. After apply self-development-jaw-lift-tool, time was reduced by 35.2%(36.6sec). the results indicated significant differences(p< .05). Image evaluation was increase 43.5%(1.03point), It was statistically highly significant difference (p< .01). If apply self-development-jaw-lift-tool in pediatric revers-water's-view, operator can provide fast, convenience, high quality image to pediatric.

가임기 여성의 유방촬영에서 Dose mode 적용의 유용성 분석

이소라,손순룡,정재연,이관섭,Lee, So-Ra,Son, Soon-Lyong,Chung, Jae-Yoen,Lee, Kwan-Seob 대한디지털의료영상학회 2013 대한디지털의료영상학회논문지 Vol.15 No.2

Purpose : Automatic exposure system(AOP mode) in DR Mammography of the STD and DOSE apply to women of childbearing age, the average glandular dose(AGD) and image quality by comparing was to demonstrate the usefulness of DOSE. Materials and Methods : Of the under 40 age 108 patients who visit to our hospital and examined STD and DOSE mammography from January 2008 to July 2013. AGD was obtained by DICOM header information provided by GE Senographe DS. STD and DOSE images were evaluated with obtained patients, Image J program was compared by calculating the SNR. Results : The average AGD of DOSE mode was 0.99mGy, and which decreased by 19% comparing to that of STD mode which was 1.18mGy. The two the average AGDs indicated statistically significant difference(p< .01). The average SNR of STD was 40.26, DOSE displayed, and to 39.68 in, there was no statistical significance. Results : The average AGD using DOSE mode which is one of DR mammography AOP modes decreased by comparing to that of STD mode showing no difference in image quality. The use of DOSE is considered to be useful.

투시조영검사 시 환자 피폭선량 저감화 대책에 관한 연구

손은영(Eun Yeong Son),노현아(Hyun A Noh),이경진(Kyeong Jin Lee),손순룡(Soon Lyong Son),하동윤(Dong Yoon Ha) 대한영상의학기술학회 2010 대한영상의학기술학회 논문지 Vol.2010 No.-

Purpose : To make an offer to the direction for minimizing the dose, we considered some measures and put the measure into practice. Materials and Methods : We measured the fluoroscopy dose with an SHMAIZU 3, HIDACHI 1, PHILIPS 2, and DAP meter (PD-4100L, Torex, Japan) from April 1 to September 18, 2009. We attached a DAP meter in front tube of the fluoroscopy equipment and calibrated the fluoroscopy equipment using a dose meter. We recorded the fluoroscopy time, a number of spot exposures and DAP before and after the activity of reducing the exposure dose. The results were compared with each other to suggest some effective ways of reducing the exposure dose. Results : 1. The average time of each examination was growing down except in colon study. It was distinguished to be reduced in the upper gastrointestinal series of 71.3% and small bowel series of 63.5%. 2. A number of spot exposure time was decreased in all examinations especially endoscopic retrograde cholangiopancreatography of 22.6% and voiding cystourethrography of 14.4% excluded in the upper gastrointestinal series. 3. This study indicated innovative results at reducing DAP which was the aim of this study. Conclusion : To reduce patient dose, we made a standard ourselves although there aren’t any standard DRL in Korea except in some examinations. It is a task of great significance to provide the data that would be a preliminary data for other hospitals that would need the data when they manage exposure doses. Exposure dose management is required for durability and repetitive doses so that it is the most important for a systematic management. For this we will concentrate on the maintenance and management exposure dose regular.

엎드린 자세에서 디지털 전척추 촬영술의 유용성 분석

오창섭(Chang-Seob Oh),김광수(Kwang-Soo Kim),손순룡(Soon-Lyong Son),이관섭(Kwan-Sup Lee) 대한영상의학기술학회 2013 대한영상의학기술학회 논문지 Vol.2013 No.-

목적: 기립 전척추 전후면 검사와 엎드린 자세에서 디지털 전척추 검사의 Cobb‘s angle 차이를 실질적으로 비교하여 엎드린 자세에서 디지털 전척추 검사의 유용성을 입증하고자 한다. 대상 및 방법: 2012년 8월부터 2013년 2월까지 척추 측만증으로 기립 자세와 엎드린 자세 에서의 디지털 전척추 검사를 시행한 환자 91명을 환자를 대상으로 하여 King 분류법으로 분류한 후, Cobb s method를 이용하여 각각의 만곡 각도를 측정하였다. 측정을 통해 얻어진 자료는 대응t검정으로 유의한 차이를 분석하였다. 결과: 척추 측만증의 Cobb s angle의 측정 후, 통계적 분석결과 엎드린 자세일 때는 기립 자세일 때에보다 흉부만곡은 평균 25.5%, 요부만곡은 평균 25.2%, 이중만곡에서는 흉부는 평균 22.8%, 요부는 21.7%로 모두 감소하였으며 통계적으로 매우 유의한 차이를 보였다 (p<.01). 흉추와 요추에서 기립 자세의 척추 측만각이 커질수록 오차의 각도가 커지는 상관 관계가 있었다. 결론: 척추 측만증의 수술자세와 동일한 엎드린 자세에서의 전척추 검사는 척추 측만증 환자의 수술 전 검사에 매우 유용하므로 임상적용 시 매우 유용하리라 판단된다. rials and Methods: After King classification, measurements of scoliosis angles with Cobb s method were carried out in a sample of ninety-one patients who examined whole spine digital radiography in standing position and prone position for scoliosis from August 2012 to February 2013. The significant differences were analyzed by t-test with the results. Results: In prone position, thoracic scoliosis was 25.5%, and lumbar scoliosis was 25.2% on the average compared to the standing position. For double scoliosis, thoracic scoliosis was 22.8%, and lumbar scoliosis was 21.7% on the average showing decreases. All the results indicated significant differences(p<.01). There was a correlation that the error angles increased as the scoliosis angles of thoracic and lumbar spine in standing position increased. Conclusion: Because an operative correction is performed in prone position, whole spine digital radiography in the same prone position would be useful as a pre-examination of the operation and applicable to the clinical practice.

투시조영 검사에서의 면적선량의 측정 및 비교 : 식도조영, 상복부위장관조영, 연하조영 중심으로

노현아(Hyun A Noh),조한영(Han Yeong Cho),문규오(Kyoo O Moon),손순룡(Soon Lyong Son) 대한영상의학기술학회 2009 대한영상의학기술학회 논문지 Vol.2009 No.-

Purpose : This thesis is, esophagography, UGI series, swallowing study using DAP meter measure in checking and fluoroscopy time, body weight, to learn about the correlation with image number, compared with earlier studies and seek the ways of reducing the radiation dose. Materials and Methods : October- December 2008 was an experiment of 212 patients. Philips has used its equipment, DAP meter adherent in front of X-ray tube calibration, and using the ion-chamber. By checking the patients weight, fluoroscopy time, image number and DAP values were measured. Results : According to the increase in esophagography fluoroscopy time as an increase in the DAP had paid attention to statistics (P<0.05). In UGI series, according to the increase in weight, fluoroscopy time, image number as an increase in the DAP had paid attention to statistics (P<0.05). In swallowing study, fluoroscopy time and DAP had paid attention to statistics (P<0.05). In all test, depending on the increase in fluoroscopy time also DAP had increased gradually. In case of our hospital, the average DAP and fluoroscopy time with advanced studies to compare at least 2.4 times, respectively, 6.5 times as high was investigating. In UGI series, fluoroscopy time at least 1.7 times, DAP 2.6 times, image number also was 2.4 time higher. Conclusion : To reduce patient dose for fluoroscopy examination, in here and now, they should evaluate patient dose and accurately analyze related factors of exposure dose. It comes to the conclusion that patient dose is reduced in good image quality by perfonning the examinations for reference of advanced studies or recommend dose recommended dose in international organizations.

선원에서 X선 방어용 칸막이간 거리가 상이한 유방촬영실의 공간 산란선량 비교

진미경(Mi Kyeong Jin),추연희(Yeon Hee Choo),손순룡(Soon Lyong Son),하동윤(Dong Yoon Ha) 대한영상의학기술학회 2010 대한영상의학기술학회 논문지 Vol.2010 No.-

Purpose : Recently, there has been an increasing interest in average glandular dose(AGD) of breast in digital mammo-radiography and it has been reported. Otherwise, there is no study on exposure dose of operators. Thus, we suggest that it set a defensive divider at standard distance and its method to reduce exposure dose of operators. Materials and Methods : Equipment resignations senography DS(GE co.) and dosimeter is model 2026c survey meter (radical co.), ACR mammmo phantom, the thick control to use did with acryl plates. The test room especially the phantom thickness and Target/Filter, changed and is measured from three points of defensive divider the scattered dose who compared Results : 1. When fixing Target/Filter, 62mm phantom scattered dose was highly measured double degree. 2. Target/Filter at the time of Mo/Mo the scattered dose was most highly measured from the same thickness. 3. On the identical condition which is to be measured the scattered dose that Mio projection of 3 or more times are higher CC projection and, defensive divider internal point the scattered dose was measured. Conclusion : As the result, until defensive divider is possible above of 136cm does shortest distance from x-ray source. Moreover It is consider that To make an curve distance from X-ray tube to defensive divider is effective than to make a straigt line distance. And In this case, thick breast and plastic breast, it’s required to make an effort to reduce dose and dose which is change from target/filter.

소아 투시조영검사 시 Pulse rate별 화질분석을 통한 저선량 모드 선택에 관한 연구

김선화(Sun Hwa Kim),조준영(Joon Yeong Cho),노현아(Hyun A Noh),손순룡(Soon Lyong Son),하동윤(Dong Yoon Ha) 대한영상의학기술학회 2010 대한영상의학기술학회 논문지 Vol.2010 No.-

Purpose : To purpose of this thesis is a research about reduction plan of radiation dose without reduction of image quality through understanding of the relationship between Dose Area Product(DAP) of Digital Flat Panel Detector(DAPD) equipment and pulse rate on pediatric fluoroscopy studies. Materials and Methods : From 2009 December to 2010 February, 40 patients under the age of 5 children who visited Asan Medical Center to check on pediatric fluoroscopy studies have been enforced(Voiding Cysto urethrography(VCUG: 20 people and Upper gastrointenstinal CUGI: 20 people). The measuring equipment used DAP meter, DAP was measured from identical patient follows per 1 minutes in pulse rate and compared a reduction. Also doctor enforced a question investigation with the object and analyzed the relationship with image quality. Results : The result were as follows; 1) From DFPD equipment, based on 30f/s of UGI examination when compared with 15f/s, at 61.8% of DAP were measured. Also 7.5f/s at 36.3%, 3.7f/s at 17.7% DAP were measured. In case of VCUG, 15f/s at 62.6%, 7.5f/s at 41.9%, 3.7f/s at 25.4% of DAP were measured. 2) Questionnaire results of radiologist about image quality, 75% of the respondents were allowed to 7.5f/s, 25% were allowed to 3.7f/s. Conclusion :In conclusion, when considering about image quality and DAP reduction followed in changes pulse rate, the use of 7.5f/s is most desirable. Therefore, we should try to reduce pediabic radiation dose through methods such as using 7.5f/s.

방사선투시장비를 사용한 검사에 참여하는 소화기내과 소속 간호사들의 의료용 방사선에 대한 의식도 조사

황민호(Min Ho Hwang),조한영(Han Yeong Cho),문규오(Kyoo O Moon),엄준용(Joon Yong Uhm),손순룡(Soon Lyong Son),박철수(Cheol Soo Park) 대한영상의학기술학회 2010 대한영상의학기술학회 논문지 Vol.2010 No.-

Purpose : To purpose of this study is to research on consciousness of gastro-intestinal nurses who work in radiation area for ERCP, PTCS, Enteroscopy, Colon stent examination. Materials and methods : This is intended for full-time twenty nurse(male 2, female 18). The research were used 5-point scale survey about radiation basic knowledge, behavior during examination, exposure management and attended a radiation education. We analyzed relationship between period of examination, age, exposure time and radiation consciousness. We also analyzed relationship between radiation basic knowledge, behavior, management and radiation consciousness using SPSS ver 12. Results : Total average consciousness was 3.92 point, total raditaion knowledge level was 3.59 point, total behavior level was 3.79 point and total radiation safety management level was 4.66 point. Female nurse has high level radiation consciousnes rather than male nurse. Radiation consciousness has nothing to relationship with period of examination, age of nurse and exposure time during examination. Everybody did not attend a radiation education. Twelve people do not knows about a radiation education. Six people could not attend due to overtime work Two of them did not attend due to disinclination. Conclusion : Management about radiation exposure of gastro-intestinal nurses is very well but their radiation basic knowledge is lower compare with average radiation consciousness. The reason for this is lack of education of medical radiation. Therefore, we should make effective and realistic education project about medical radiation for gastro-intestinal nurses.

Source Image Distance 변화에 따른 환자 및 검사자의 피폭선량 비교

조한영(Han Yeong Cho),황민호(Min Ho Hwang),박은성(Eun Seong Park),노성순(Seung Soon Ro),손순룡(Soon Lyong Son),하동윤(Dong Yoon Ha) 대한영상의학기술학회 2010 대한영상의학기술학회 논문지 Vol.2010 No.-

Purpose : We suggest the basic data that we set up the standard SID without changing image quality, by comparing the exposure dose of patients and operators with SID, in fluoroscopy. Materials and Methods : Shimavision 3200HG (Shimaclzu, over tube system) was used for fluoroscopy. Unfors Xi meter(dosimetry), CDRH phantom and Rando phantom were used to measure image as human equivalence. We assess average patient exposure dose and image contrast acquired 10 spots and 10sec of fluoroscopies 10times by changing SID(1000mm, 1100mm, 1200mm, 1300mm). In addition, We measured operator’s dose at point(chest1200mm, thyroid1400mm, lens1600mm) from machine table in same method. Results : The measured results are as follows 1. The longer the SID, the less exposure dose in fluoroscopy and spot. - Fluoroscopy : 1000mm 319.3μGy/s, 1100mm 276.7μGy/s, 1200mm 235.3μGy/s, 1300 203.6μGy/s - Spot : 1000mm 36.9mGy/s, 1100mm 29.3mGy/s, 1200mm 25.5mGy/s, 1300 21.7mGy/s 2. It was the least operator’s exposure dose at chest(1300mm, 1.15μGy/s), otherwise, it was the much at 1000mm (1.38μGy/s). It was the least at thyroid and lens, otherwise, it was the much at 1000mm. 3. AS the result of image quality assessment by using CDRH phantom, It was evaluated in appropriately at SID 1300mm. Conclusion : We suggest that SID was setted up 1200mm. Because it is effectively distance that it is not only a falling-off in image quality but less exposure dose of patients and operators.