• Journal of Korean Neurosurgical Society
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• 제56권6호
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• pp.509-512
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• 2014

Primary intraosseous meningioma is a rare tumor, and atypical pathologic components both osteolytic lesion and dura and soft tissue invasion is extremely rare. A 65-year-old woman presented with a 5-month history of a soft mass on the right frontal area. MR imaging revealed a 4 cm sized, multilobulated, strongly-enhancing lesion on the right frontal bone, and CT showed a destructive skull lesion. The mass was adhered tightly to the scalp and dura mater, and it extended to some part of the outer and inner dural layers without brain invasion. The extradural mass and soft tissue mass were totally removed simultaneously and we reconstructed the calvarial defect with artificial bone material. The pathological study revealed an atypical meningioma as World Health Organization grade II. Six months after the operation, brain MR imaging showed that not found recurrence in both cranial and spinal lesion. Here, we report a case of primary osteolytic intraosseous atypical meningioma with soft tissue and dural invasion.

• 대한수의학회지
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• 제48권2호
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• pp.209-213
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• 2008

A four-month-old intact femlae Abyssinian cat was present for routine health evaluation, because her littermate was recently died of ventricular septal defect. Diagnostic imaging studies showed a large caudal paracardiac mass in thoracic radiography and homogenous mass adjacent to heart in the echocardiography. Further echographic study revealed that the mass was liver and the diaphragmatic line was intact. The positive contrast celiogram revealed that no extravasation of the contrast media across the diaphragm and the prolapse of diaphragm into the pleural cavity. Based on our diagnostic imaging studies, the case was diagnosed as diaphragmatic deformity in a cat mimicking a cardiac mass.

• 대한디지털의료영상학회논문지
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• 제15권1호
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• pp.9-20
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• 2013

PACS is one of the most used medical information system and share information from other hospitals through the PACS. Data integrity means zero defects data and this is a prerequisite of information system performance. but I wonder if I can trust these informations that Incorrect information from radiotechnologist's mistakes, anonymous in emergency department, Newborn baby department, modified informations at later. And Modified informations causes defect in integrity of the data. When we import, we use DICOM header not DB data. so error occurs that DB data is deferent with DICOM Header information. This paper discusses to resolve as above problem using DICOM object such as DICOM PR, SR. And propose quality management system that can guarantee the patient information and can manage exam history.

• Imaging Science in Dentistry
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• 제46권1호
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• pp.47-51
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• 2016

Herein, we report and discuss the detection of fossa navicularis magna, a close radiographic anatomic variant of canalis basilaris medianus of the basiocciput, as an incidental finding in cone-beam computed tomography (CBCT) imaging. The CBCT data of the patients in question were referred for the evaluation of implant sites and to rule out pathology in the maxilla and mandible. CBCT analysis showed osseous, notch-like defects on the inferior aspect of the clivus in all four cases. The appearance of fossa navicularis magna varied among the cases. In some, it was completely within the basiocciput and mimicked a small rounded, corticated, lytic defect, whereas it appeared as a notch in others. Fossa navicularis magna is an anatomical variant that occurs on the inferior aspect of the clivus. The pertinent literature on the anatomical variations occurring in this region was reviewed.

• 한국전기전자재료학회:학술대회논문집
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• 한국전기전자재료학회 2006년도 학술대회 및 기술세미나 논문집 디스플레이 광소자
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• pp.85-88
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• 2006

The transport properties of amorphous selenium typical of the material used in direct conversion x-ray imaging devices are reported. The effects of As addition on the carrier mobility and recombination lifetime in amorphous selenium (a-Se) films have been studied using the moving photocarrier grating (MPG) technique. We have found an increase in hole drift mobility and recombination lifetime, especially when 0.3% As is added into a-Se film, whereas electron mobility decreases with As addition due to the defect density. The transport properties for As doped a-Se films obtained by using MPG technique have been compared with the drift mobilities of holes and electrons obtained by time of flight (TOF) measurement.

• Nuclear Engineering and Technology
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• 제45권3호
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• pp.361-366
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• 2013

An imaging technique to visualize the internal defects in a plate-type nuclear fuel specimen was developed by using an active optical interferometer for a nondestructive quality inspection. A periodic thermal wave having a sinusoidal intensity pattern induced a periodical strain variation for the specimen. The varying strain image was acquired using an optical laser interferometer. The strain distribution over the internal defects will be distorted in an acquired strain image because a part of the thermal wave will be reflected from these defects during propagation. In this paper, internal defects were efficiently visualized by sequentially accumulating the extracted defect components. The experimental results confirmed that the developed visualization system can be a valuable tool to detect the internal defects in plate-type nuclear fuel.

• 대한용접접합학회:학술대회논문집
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• 대한용접접합학회 2004년도 춘계 학술발표대회 개요집
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• pp.103-105
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• 2004

키홀 용접현상에 관한 연구는, 키홀 현상이 용융금속내부에서 아주 빠른 속도로 과도적으로 이루어지기 때문에 그 계측과 해석이 곤란하여 수 많은 가정이나 가설 하에서 용입형상과 키홀의 거동에 관한 해석이 국한된 영역에서 이루어지고 있는 것이 현실이다. (중략)

• Korean Journal of Radiology
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• 제2권3호
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• pp.175-178
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• 2001

We describe the imaging features of two cases of biliary ascariasis. Ultrasonography and CT showed no specific abnormal findings, but MR cholangiography clearly demonstrated an intraductal linear filling defect that led to the correct diagnosis. MR cholangiography is thus a useful technique for the diagnosis of biliary ascariasis.

• 대한관절경학회지
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• 제5권2호
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• pp.99-103
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• 2001

목적 : 이번 전향적 연구의 목적은 슬관절의 연골 결손 환자의 치료로서 자가 골연골 이식술을 시행한 후 이차 관절경을 시행하여 관찰하는 것이다. 재료 및 방법 : 슬관절의 연골 결손의 치료로 자가 골연골 이식술이 시행된 40명의 환자 중 14면에서 이차 관절경이 시행되었다. 환자들의 연령은 $17\~59$세로, 평균 연령은 34세였다. 수술 전 14명 중 11명에게서 자기 공명영상을 시행하여 9면에서 연골 결손이 관찰되었으나 관절경술상 전례에서 연골결손을 확인하였다. 연골 결손의 부위는 대퇴골 내과가 7명, 활차 부위가 4명, 대퇴골 외과가 3명이었다. 연골 결손의 크기는 평균 $13\times10mm$, 최소 $5\times10mm$, 최대 $22\times20mm$이었다. 사용된 골연골의 갯수는 1개를 사용한 경우 8명, 2개가 3명, 3개가 2명, 5개가 1명이었다. 결과 : 수술 후 추적 관찰은 평균 21개월이었다. 대부분의 경우 수술 후 6개월에 이차 관절경을 시행하였다. 시행한 환자의 $86\%$에서 이식된 연골의 경도가 주변의 연골과 같았으며, $93\%$의 환자에서 주변 연골과 잘 융화된 것을 관찰할 수 있었다. 결론 : 자가 골연골 이식술을 자가 골연골 이식술은 슬관절의 연골결손의 치료의 한 방법으로 사용될 수 있을 것으로 생각된다.

• Applied Microscopy
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• 제39권4호
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• pp.349-354
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• 2009

TFT-LCD의 구조불량이 발생한 박막 트랜지스터에 대해서 집속이온빔 가공장치(Dual-beam FIB/SEM)를 이용하여 연속절편법(Serial sectioning)과 일련의 연속적인 2차원 주사전자현미경 이미지를 얻었고, IMOD 소프트웨어를 통해서 3차원 구조구현(3D reconstruction) 연구를 하였다. 3차원 구조구현 결과, Gate막과 Data막이 접합되어 있는 불량이 관찰되었다. 두 막이 접합되어서 ON/OFF 역할을 하는 Gate의 기능이 상실되었고, Data신호는 Drain을 통해서 투명전극에 전류를 공급하여 계속 빛나는 선 불량(line defect)이 발생한 것으로 판단된다. 이 논문의 결과인 집속이온빔 가공장치(Dual-Beam FIB/SEM)를 이용한 3차원 구조구현 연구와 연속절편법, 주사전자현미경 이미지작업, 이미지 프로세싱에 대한 결과는 향후 연구의 기초자료로 활용될 수 있을 것으로 판단된다.