• 한국방사선학회논문지
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• 제13권6호
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• pp.857-864
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• 2019

캐나다 등 많은 국가들이 초음파사(sonographer) 면허제도를 방사선사면허와 별도로 운영하고 있다. 그러나 한국에서는 방사선사가 의사의 지도아래 초음파영상검사를 수행하고 있다. 이에 방사선사의 초음파영상검사에 대한 직무역량을 분석하여 체계적으로 교육할 기회를 갖기 위하여 캐나다 초음파사의 표준직무역량(National Competency Profile)을 토대로 한국에서 방사선사가 초음파영상검사를 수행함에 있어 요구되는 직무역량과 세부역량들에 대한 직무 내용타당도를 측정하였다. 한국 방사선사 직무역량에 포함된 핵심역량의 중요도과 직무수행 정도를 비교분석한 결과 전체 중요도의 평균은 4.087점, 전체 수행도의 평균은 3.640점으로 중요도가 더욱 높았으며, 통계적으로 유의한 차이를 보였다. 그 결과 'A 의사소통', 'B 전문가적 책임', 'D 장비취급', 'G 근무 장소의 건강 및 안전'은 직무 내용타당도가 높았다. 그러나 'C 환자 평가와 돌봄', 'E 비평적 사고와 문제해결', 'H 영상'은 직무 내용타당도가 낮게 나타나 이들 역량을 강화하고 보완할 수 있는 방안이 모색되어야 한다.

• 재활복지
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• 제21권3호
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• pp.147-163
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• 2017

본 연구의 목적은 승마기구운동이 뇌졸중환자의 하지 골격근 두께에 미치는 영향을 알아보기 위해서 시행되었다. 연구대상자는 G 광역시에 위치한 A병원에 입원중인 뇌졸중환자 30명을 대상으로 선정하였다. 본 연구의 대상자들은 두 그룹으로 승마기구운동군 15명, 대조군 15명으로 무작위 배치되었다. 승마기구운동군은 실험 기간 총 6주 동안 주 3회, 회당 20분 운동을 실시하였다. 넙다리곧은근, 앞정강근, 안쪽 장딴지근, 중간볼기근의 두께 변화를 측정하기 위해서 초음파 영상촬영 장치를 사용하였다. 30명의 연구대상자들에 대한 측정은 운동 전, 운동 6주 후에 수행되었다. 데이터의 분석은 통계적 유의수준을 결정하기 위해서 독립 t-검정과 대응표본 t-검정을 이용하였다. 각 그룹 간 중재 전 후 차이값에 대한 근 두께의 비교에서는 네 근육 모두 유의한 차이가 나타났다. 승마 운동군은 근육 두께에 대한 운동 전과 후의 비교에서 네 근육 모두 유의한 증가를 보였다. 대조군은 운동 전과 후의 비교에서 RF, GM, TA에서 유의한 증가가 있었다. 결과적으로 승마기구운동은 무릎의 안정화와 하지 폄근의 활성으로 인해 하지 근두께의 향상이 나타났다.

• Tuberculosis and Respiratory Diseases
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• 제82권4호
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• pp.319-327
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• 2019

Background: Radial probe endobronchial ultrasound (R-EBUS), is effective for tissue diagnosis of lung lesions. We evaluated the diagnostic performance of R-EBUS both a guide-sheath and fluoroscopy and identified factors associated with accurate diagnosis. The feasibility of molecular and genetic testing, using specimens obtained by R-EBUS, was also investigated. Methods: The study retrospectively reviewed 211 patients undergoing R-EBUS without a guide-sheath and fluoroscopy, June 2016-May 2017. After excluding 27 patients of which the target lesion was not reached, 184 were finally included. Multivariate logistic regression was used, to identify factors associated with accurate diagnosis. Results: Among 184 patients, R-EBUS-guided biopsy diagnosed malignancy in 109 patients (59%). The remaining 75 patients (41%) with non-malignant results underwent additional work-ups, and 34 were diagnosed with malignancy. Based on final diagnosis, diagnostic accuracy was 80% (136/170), and sensitivity and specificity for malignancy were 76% (109/143) and 100% (27/27), respectively. In multivariate analysis, peripheral location (adjusted odds ratio [aOR], 3.925; 95% confidence interval [CI], 1.203-12.811; p=0.023), and central position of the probe (aOR, 2.435; 95% CI, 1.424-7.013; p=0.035), were associated with accurate diagnosis of malignancy. Molecular and genetic analyses were successful, in all but one case, with inadequate specimens. Conclusion: R-EBUS-guided biopsy without equipment, is effective for tissue diagnosis. Peripheral location and central position of the radial probe, were crucial for accurate diagnosis. Performance of molecular and genetic testing, using samples obtained by R-EBUS, was satisfactory.

• 한국방사선학회논문지
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• 제13권1호
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• pp.21-29
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• 2019

본 실험의 목적은 SonoVue를 이용하여 장비 간 MI 값 및 시간 변화에 따른 관계를 유추해 보고, 신호 차이를 비교 분석하는 것이다. 비교 장비 모두 MI 값 증가에 따라 초기에 강한 신호 값을 보였다. 시간의 경과에 따라 장비 간 신호 값은 RS85A의 MI 0.1의 조건의 10분경과를 제외한 모든 조건에서 신호 감소를 보였다. 장비 간 비교에서 EPIQ7, RS85A, E9순으로 높은 값이 나왔고, RS85A와 E9의 SNR과 CNR의 정량적 평가에서 모두 p-value<0.05로 통계적으로 유의하였다. EPIQ7에서의 MI 값의 SNR을 제외한 CNR과 시간에 따른 SNR, CNR 모두 통계적으로 유의하였다. 이를 통해 조영 증강 초음파 검사에 있어 낮은 MI 값 (MI<0.5)이더라도 장비 간 신호 강도 차이가 있으므로 MI 값과 시간을 조절하여 검사하는 것이 권고된다.

• 한국치위생학회지
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• 제16권4호
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• pp.635-641
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• 2016

Objectives: The purpose of this study is to assess the characteristics of tooth surface after using Gracy curet and Ultrasonic scaler Methods: In this study, 12 teeth extracted were used. 12 specimens were divided into three groups with the same numbers, which were classified into Control group, Gracy curet use group, and Ultrasonic scaler use group, and after performing instrument operation, we measured the roughness and the loss degree of tooth surface by using SEM. Results: In groups using Gracy curet and Ultrasonic scaler, the roughness and the loss of tooth surface increased significantly(p<0.05). In the roughness of groups using Gracy curet and Ultrasonic scaler, Ultrasonic scaler group was higher in crown, but Gracy curet group was higher in root. As a result of observation through SEM, the roughness and the loss degree increased in order of Control group, Ultrasonic scaler use group, and Gracy curet use group. Conclusions: Taken together above results, both hand instrument and ultrasound equipment create roughness and loss in crown and in root, and hand instruments makes rougher than ultrasonic instruments in root, so it is thought to require thorough and accurate technical application not to damage tooth surface when removing plaque.

• 대한방사선기술학회지:방사선기술과학
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• 제22권2호
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• pp.33-39
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• 1999

This paper included a data analysis of the unit of medical devices using mainternance recording card that had medical devices of unit failure mode, hospital of failure mode and MTBF. The results of the analysis were as follows : 1. Medical devices of unit failure mode was the highest in QC/PM such A hospital as 33.9%, B hospital 30.9%, C hospital 30.3%, second degree was the Electrical and Electronic failure such A hospital as 23.5%, B hospital 25.3%, C hospital 28%, third degree was mechanical failure such A hospital as 19.5%, B hospital 22.5%, C hospital 25.4%. 2. Hospital of failure mode was the highest in Mobile X-ray device(A hospital 62.5%, B hospital 69.5%, C hospital 37.4%), and was the lowest in Sono devices(A hospital 16.76%, B hospital 8.4%, C hospital 7%). 3. Mean time between failures(MTBT) was the highest in SONO devices and was the lowest in Mobile X-ray devices which have 200 - 400 failure hours. 4. Anverage failure ratio was the highest in Mobile X-ray devices(A hospital 31.3%, B hospital 34.8%, C hospital 18.7%), and was the lowest in Sono(Ultrasound) devices (A hospital 8.4%, B hospital 4.2%, C hospital 3.5%). 5. Failure ratio results of medical devices according to QC/PM part of unit failure mode were as follows ; A hospital was the highest part of QC/PM (50%) in Mamo X-ray device and was the lowest part of QC/PM(26.4%) in Castro X-ray. B hospital was the highest part of QC/PM(56%) in Mobile X-ray device, and the lowest part of QC/PM(12%) in Gastro X-ray. C hospital was the highest part of QC/PM(60%) in R/F X-ray device, and the lowest a part of QC/PM(21%) in Universal X-ray. It was found that the units responsible for most failure decreased by systematic management. We made the preventive maintenance schedule focusing on adjustement of operating and dust removal.

• Imaging Science in Dentistry
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• 제38권2호
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• pp.73-79
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• 2008

Purpose: To assess the internal echo intensity and morphological variability of masseter muscles on ultrasonography and to establish diagnostic criterion of estimation. Materials and Methods: Participants consisted of 50 young adults (male 25, female 25) without pathologic conditions and with full natural dentitions. Sonographic examinations were done with real time ultrasound equipment as Logiq 500 (GE Medical Systems, Seoul, Korea) at 3 parts according to lines paralleling with ala-tragus line as reference line. The thickness and area of masseter muscles according to reference line in cross-sectional images were measured at rest and at maximum contraction. The visibility and width of the internal echogenic intensity of the masseter muscles were also assessed and the muscle appearance was classified into 4 types. Data were statistically analyzed by paired t-test and $x^2$-test. Results: 1. When comparing the thickness and area of masseter muscles concerning with gender, there was few significant difference between right and left sides, however, there were significant differences between males and females except for the greatest thickness of left side. 2. The changes of the greatest thickness and the area between rest and maximum contraction showed that the part of the least thickness manifested more increase at maximum contraction. 3. Each part the manifestations of the internal echogenic intensity of the masseter muscles were different depending on the locations. But there was no statistically significance. Conclusion: Changes of muscles thickness with contraction and internal echogenic intensity with locations showed great disparity within the masseter muscles, which will be diagnostic criteria for pathophysiologic and anatomic changes of masseter muscles.

• 대한의용생체공학회:의공학회지
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• 제41권5호
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• pp.173-178
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• 2020

Remote control intervention surgery robotic system improves treatment effect on cardiovascular patients and reduces X-ray exposure. However, at the time of the first procedure, CT (computerized tomography) and other ultrasound diagnostic equipment should be used because the operator must insert the cannula directly into the patient's leg. Improvements to this have been un-met-needs of hospitals. In this paper, we developed a system that can insert the cannula intuitively and quickly by displaying blood vessels at a glance through the system using smart wearable glasses. The core development method is as follows. In order to project augmented reality onto the surgical image, CT scan angiography image is extracted and processed. In the process, three CT-Markers are used to create a coordinate system of blood vessel images. Additionally, a reference marker is photographed on a single camera to obtain a camera coordinate system. Since the CT marker and the reference marker are in the same position, 3D registration is performed. In the text, a detailed explanation will be given.

• 한방안이비인후피부과학회지
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• 제33권4호
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• pp.126-132
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• 2020

Objectives : The study is to report cases of open/closed types of epidermal cyst removed by surgical method with Bufonis Venenum pharmacopuncture. Methods : 2 patients were diagnosed each open/closed epidermal cyst. Local anesthesia was achieved with Bufonis Venenum pharmacopuncture. Incision was made using 15^th blade and the CO₂ Hani-maehwa laser. After cyst was removed, simple interrupted suture was performed. Eunkyo-san and Yeonkyopaedok-san were administered respectively for 7 days for anti-inflammatory effects. Results : Local anesthesia was maintained until epidermal cysts were clearly removed. The suture was removed after confirmation of skin adhesion. Adverse reactions were not reported. Conclusions : Epidermal cysts were removed surgically after Bufonis Venenum pharmacopuncture anesthesia and the risk of infection can be prevented by administering herbal medicines that have anti-inflammatory properties. It is difficult to visually diagnose closed type of epidermal cyst and then suggests that imaging equipment such as ultrasound is required.

• 대한디지털의료영상학회논문지
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• 제13권1호
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• pp.33-38
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• 2011

Now a days, there's many change over for PACS among the most of hospital and it standard for DICOM 3.0. These kind of using of DICOM 3.0 improves increasing of medical imaging exchange and service for patient. However, there's some problems of compatibility caused during carry out CD and DVD from hospital. For this reason, this thesis analyzed patients image targeting those storages requested to hospitals in Seoul by using Validation Toolkit which is recommended from KFDA. The analyze type is like this. Make 100 data, total 500, each of MRI CT Plain x-ray Ultrasound PET-CT images and analyzed type of error occurred and loyalty of information. If express percentage of error occurred statistically, we can get a result as follows MRI 5%, Plain x-ray 11%, CT 18%, US 25%, PET-CT 30%. The reson why percentage of error occurred in PET-CT is because of imperfective support and we could notice that we weren't devoted to information. Even though, PET-CT showed highest percentage of error occurred, currently DICOM data improved a lot compare to past. Moreover, it should be devoted to rule of IHE TOOL or DICOM. In conclusion, we can help radiographer to analyze information of image by providing clues for solving primary problem and further more, each of PACS company or equipment company can enhance fidelity for following standard of image information through realizing the actual problem during transfer of image information.