• Journal of Chest Surgery
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• 제43권6호
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• pp.694-699
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• 2010

배경: 유육종증의 진단에는 임상적, 방사선학적 소견과 함께 조직검사가 중요하다. 이 연구는 유육종증이 의심되는 환자에서 사각근 림프절 생검이 가지는 진단적 유용성을 평가하고자 한다. 대상 및 방법: 2001년부터 2009년까지 본원에서 증상 유무와 상관없이 시행한 단순흉부촬영과, 흉부컴퓨터단층촬영상 유육종증이 의심되는 환자 중 사각근 림프절 생검을 시행한 35명을 대상으로 하였다. 결과: 남자는 15명 여자는 20명이었으며 평균 나이는 $41.51{\pm}11.21$세 (25~64)였다. 35명 중 3명이 결핵을 진단 받았고 32명 중 27명이 유육종증을 진단 받아 84.4%의 진단율을 얻었다. 사각근 림프절 크기의 평균은 1.26 (${\pm}0.11$) (0.3~3.6 cm) 였다. 단순흉부촬영 상 폐침윤 여부에 따라 두 군으로 나누었을 때 (0기와 1기, 2기와 3기), 그리고 림프절의 크기가 1 cm 이상인 군과 1 cm 미만인 군으로 나누었을 때 각각의 경우 두 군의 양성 판정율에 유의한 차이는 없었다(p=0.604) (p=0.085). 수술 합병증 및 사망률은 없었다. 결론: 사각근 림프절 생검은 국소마취 하에 간단하게 큰 합병증 없이 시행될 수 있으며 질환의 병기나 림프절의 크기에 관계 없이 높은 진단율을 나타내었다. 사각근 림프절 생검은 유육종증의 진단에 있어서 다른 조직검사 방법들을 대신하여 시행할 수 있는 좋은 방법이다.

• International Journal of Contents
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• 제8권2호
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• pp.52-59
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• 2012

This study uses digital imaging and communications in medicine (DICOM) files acquired after CT scan to obtain the absorbed dose distribution inside the body by using the patient's actual anatomical data; uses geometry and tracking (Geant)4 as a way to obtain the accurate absorbed dose distribution inside the body. This method is easier to establish the radioprotection plan through estimating the absorbed dose distribution inside the body compared to the evaluation of absorbed dose using thermo-luminescence dosimeter (TLD) with inferior reliability and accuracy because many variables act on result values with respect to the evaluation of the patient's absorbed dose distribution in diagnostic imaging and the evaluation of absorbed dose using phantom; can contribute to improving reliability accuracy and reproducibility; it makes significance in that it can implement the actual patient's absorbed dose distribution, not just mere estimation using mathematical phantom or humanoid phantom. When comparing the absorbed dose in polymethly methacrylate (PMMA) phantom measured in metal oxide semiconductor field effect transistor (MOSFET) dosimeter for verification of Geant4 and the result of Geant4 simulation, there was $0.46{\pm}4.69%$ ($15{\times}15cm^2$), and $-0.75{\pm}5.19%$ ($20{\times}20cm^2$) difference according to the depth. This study, through the simulation by means of Geant4, suggests a new way to calculate the actual dose of radiation exposure of patients through DICOM interface.

• Tuberculosis and Respiratory Diseases
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• 제75권3호
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• pp.125-127
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• 2013

In this paper, we describe 72-year-old female patient without evidence of malignant disease presented with significantly elevated serum carbohydrate antigen (CA) 19-9 levels by respiratory infections. She was diagnosed with respiratory infections due to Mycobacterium avium complex and Pseudomonas aeruginosa. The serum CA 19-9 levels remarkably increased (1,453-5,300 U/mL; reference range, <37 U/mL) by respiratory infection and abruptly decreased (357-534 U/mL) whenever infection was controlled by specific treatments. This case suggests that serum CA 19-9 levels may be used as a diagnostic marker to indicate new or resistant infections to previous antibiotics in chronic lung diseases without significant changes in chest X-ray findings.

• 대한의용생체공학회:의공학회지
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• 제25권4호
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• pp.235-242
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• 2004

본 논문에서는 영역 성장법을 기반으로 자동적인 임계치 설정에 의하여 미세 석회화를 추출하는 방법을 제안하였다. 미세 석회화 후보 영역에서 임계치를 반복적으로 증가시키면서 국부 최대치 화소로부터 영역을 성장시키고 명암 대비와 에지 선예도가 최대일 때 최적의 임계치가 결정됨으로써, 실제 영상에 있어서 효과적으로 미세 석회화를 추출할 수 있었다. 총 299개의 미세 석회화에 대하여 81.5%의 TP(true positive) 비율과 1.1개의 평균 FP(false positive) 개수를 가지는 만족할 만할 결과를 얻었으며, 진단 방사선 전문의의 조기 유방암 진단을 위한 보조 역할이 될 수 있음을 알 수 있었다.

• 대한방사선기술학회지:방사선기술과학
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• 제1권1호
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• pp.37-43
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• 1978

This Study was conducted, during the period of 8-16th, August in 1977 and 27th, January through 2, Feburury in 1978, to measure laking off and on time for patient's clothes at the radiologic department in general hospitals. The study dealt with three general hospitals which were classified into groups by ownerships; two university hospitals, one private hospitals. The scope of the study was limited to measurement's of taking off and on time except taking a radiograph. The results were summarized as follows: [1] In Summer, the average taking off ana on tine for male was 3 minutes and 7 seconds and 3 minutes and 43 seconds for female. The latter was longer than that for the former. [2] In Winter, the mean taking off and on time for male was 3 minutes 42 seconds, 4 minutes 17 seconds for female. [3] In this respect, the average taking off and on time for female was longer than that for male and that for winter was expended that for summer. [4] In Summer, regardless of age group and sex, the average taking off and on time for taking a radiograph was 3 minutes 25 seconds, and 3 minuteds 59 seconds in Winter. [5] Regardless of season, sen, and age, the mean time expended to take off and on for taking a radiograph was 3 minutes 43 seconds.

• Tuberculosis and Respiratory Diseases
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• 제57권2호
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• pp.197-200
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• 2004

흉부방선균증은 임상양상 및 방사선학적 소견이 폐의 기타 염증성 질환이나 악성암과 유사한 경우가 많아 감별진단에서 놓치기 쉬우나, 대부분 항생제 치료에 좋은 반응을 보이므로 조기진단을 위한 적극적 접근으로 심각한 합병증의 발생 및 불필요한 수술을 막아야 한다. 저자들은 폐암을 의심하여 시행한 검사도중 폐를 침범하는 방선균증을 경험하였기에 문헌고찰과 함께 보고하는 바이다.

• The Journal of Advanced Prosthodontics
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• 제9권6호
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• pp.432-438
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• 2017

PURPOSE. The purpose of this study was to evaluate the in vitro validity of quantitative light-induced fluorescence-digital (QLF-D) and laser fluorescence (DIAGNOdent) for assessing proximal caries in extracted premolars, using digital radiography as reference method. MATERIALS AND METHODS. A total of 102 extracted premolars with similar lengths and shapes were used. A single operator conducted all the examinations using three different detection methods (bitewing radiography, QLF-D, and DIAGNOdent). The bitewing x-ray scale, QLF-D fluorescence loss (${\Delta}F$), and DIAGNOdent peak readings were compared and statistically analyzed. RESULTS. Each method showed an excellent reliability. The correlation coefficient between bitewing radiography and QLF-D, DIAGNOdent were -0.644 and 0.448, respectively, while the value between QLF-D and DIAGNOdent was -0.382. The kappa statistics for bitewing radiography and QLF-D had a higher diagnosis consensus than those for bitewing radiography and DIAGNOdent. The QLF-D was moderately to highly accurate (AUC = 0.753 - 0.908), while DIAGNOdent was moderately to less accurate (AUC = 0.622 - 0.784). All detection methods showed statistically significant correlation and high correlation between the bitewing radiography and QLF-D. CONCLUSION. QLF-D was found to be a valid and reliable alternative diagnostic method to digital bitewing radiography for in vitro detection of proximal caries.

• 한국의학물리학회:학술대회논문집
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• 한국의학물리학회 2002년도 Proceedings
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• pp.436-438
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• 2002

As the use of virtual simulation expands, digitally reconstructed radiographs (DRRs), which mimic conventional simulation films, play an increasingly important role as reference images in the verification of treatment fields. The purpose of our study is to develop an algorithm for computation of digitally reconstructed radiographs based on Monte Carlo simulation that take into account almost all possible physical processes by which photons interact with matter. The Monte Carlo simulation based DRRs have the following features. 1) Account has been taken of almost all possible physical processes of interaction of photons with matter, including a detector (film) response. In principle, this is equivalent to X-ray radiography. 2) Arbitrary photon energies (from diagnostic to therapeutic) can be used to produce DRRs. One can even use electrons as the source. 3) It is easy to produce a double exposure, which mimics the double exposure portal image and may have superior visual appeal for treatment field verification, with weighting within the treatment field.

• 대한기관식도과학회:학술대회논문집
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• 대한기관식도과학회 1982년도 제16차 학술대회연제순서 및 초록
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• pp.13.1-13
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• 1982

포충증은 주로 유구낭충에 감염된 환자에 larval cysticercoid stage때 soft tissue에 전이되어 이 cysticercus가 죽음으로써 변성되고 석회화를 일으켜 국소적 소견으로는 nontender mass, 그리고 X-ray 상 typical calcification을 일으키며 조직학적 소견으로는 fibrotic cyst속에 scolex의 hooks와 sucker를 볼 수 있다. 만약 cysticercosis가 두뇌속으로 전이된다면 두뇌의 침범된 부위의 국소증상이 나타날 수 있으며 예후는 매우 나쁘다. 조직학적 소견상 포충증으로 확진되면 환자를 입원시켜 전신을 검사하여 nontender mass가 만져지면 적출하여 주어야 한다. 저자들은 우측 안면부에 nontender mass를 주소로 하여 내원한 24세 남자에서 우측 안면부에 전이된 유구낭충증 1 례를 경험하였기에 문헌적 고찰과 함께 보고하는 바이다.

• Journal of Chest Surgery
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• 제7권1호
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• pp.85-92
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• 1974

During the years 1959 to 1974, 99 patients with patent ductus arteriosus were admitted to National University Hospital. These includes 5 patients with additional cardiovascular and 5 patients with severe pulmonary hypertension. All were operated upon except three refused operation. In all instances, the diagnosis was made by history and physical, roentgenological and electrographic examinations. In addition, in 53 patients, special diagnostic procedures were carried out either for diagnosis or for evaluation of pulmonary hypertension and associated cardiovascular anomalies. Right cardiac catheterization was resorted to in 51 patients. In one of these patients catheterization was incorrectly interpreted [ventricular septal defect]. Retrograde aortogram was performed in two patients. In both cases the ductus itself was visualized on the x-ray film. An additional vascular anomaly, namely the persistent left superior vena cava, was confirmed by retrograde angiogram in one of them. In 5 cases the pulmonary arterial pressure was elevated well over 80 mmHg. In these instances,the operative mortality was 80% [4 out of 5 patients]. The management of patent ductus arteriosus when associated with severe pulmonary hypertension. and/or other cardiac anomalies is controversial. Opinions differ as to how to close the ductus and to repair the cardiac anomalies as well as to whether a one-staged or two-staged procedure should be resorted to. The author is of the that each case must be evaluated individually before any specific surgical treatment is ou.tlined. The literature on the subject is reviewed in this paper.