• Journal of Chest Surgery
• /
• 제28권3호
• /
• pp.228-232
• /
• 1995

Computed tomography[CT is an effective technique for the evaluation of the thorax following blunt trauma. To evaluate multiply injured 30 patients who were diagnosed as hemothorax in emergency room, computed tomography of thorax was done. The thickness of slice was one centimeter and the entire pleural cavity from the apex to the costophrenic angle was included in the evaluation. Integration and addition of the hemothorax area for each CT slice was made and amount of blood in the pleural cavity was estimated. The slice which showed largest area of hemothorax was selected and the height and width of the hemothorax area were measured. The number of slices which showed radiographic evidence of hemothorax was counted. Regression analysis was done and measured amount of hemothorax, the height and width of the hemothorax area for each slice and number of slices were put as variables. And following equation was derived. V=108.3A-0.8B-7.4C+84.7 [R2=0.74 [ V: amount of hemothorax, A: height, B: width, C: number of slices Total amount of blood from thoracic drainage was compared to the measured amount by computed tomography and the relation between the two values was statistically significant.[p=0.001 In conclusion, quantitative estimation of size of hemothorax was possible by the above equation and the process was very helpful for determination policy of treatment of individual patient.

• 한국추진공학회:학술대회논문집
• /
• 한국추진공학회 2006년도 제27회 추계학술대회논문집
• /
• pp.25-29
• /
• 2006

본 연구는 가압상태에서 오링 변형 거동을 측정하기 위한 새로운 시험 기법을 개발하기 위함이다. 전산화 단층촬영으로 압출 틈에서 측정한 압출 길이와 비접촉 레이저 변위 센서로 측정한 압출 길이는 결과가 일치하였다. 전산화 단층촬영에서 측정한 변형된 오링 형상과 유한요소법으로 해석하여 얻은 오링 형상은 압출 길이와 확장 지름은 일치하였으나, 오링과 스틸의 접촉 길이는 전산화 단층촬영의 결과가 유한요소해석의 결과보다 약간 크게 측정되었다.

• 전자통신동향분석
• /
• 제12권6호통권48호
• /
• pp.50-57
• /
• 1997

CT스캔(Computed Tomography)은 다양한 분야에서 효과적으로 응용되고 있고, 특히 의학 영상에서 비침범 진단, 수술 계획 등에 커다란 영향을 끼쳤다. 이 글에서는 여러 가지 CT스캔의 종류, 그 수학적인 원리와 기본적인 평행 광선(parallel beam)을 이용한 영상의 재구축 알고리즘, 데이터의 추정과 문제점 그리고 그 개선 방향에 대해 논한다

• Journal of Korean Neurosurgical Society
• /
• 제48권1호
• /
• pp.31-36
• /
• 2010

l death via apoptosis in human gliomas.

• 대한치과의사협회지
• /
• 제48권10호
• /
• pp.729-737
• /
• 2010

The use of cone-beam computed tomography(CBCT) image has been increased. Usually, the dentists use this images for the implant or orthodontic treatment. In this article, CBCT examples for oral surgery and endodontics are presented. CBCT is very useful when dentists extract teeth or provide endodontic treatment. The disadvantage of the CBCT image is also discussed simply. Clinicians could provide higher quality of medical care with CBCT.

• Imaging Science in Dentistry
• /
• 제41권3호
• /
• pp.135-137
• /
• 2011

Impaction of third molar is a common developmental abnormality. However, ectopic impaction of the mandibular third molar in condylar region is an extremely rare condition. This report describes a case of impacted tooth in the mandibular condyle without any associated pathologic condition. Also, this report presents the spatial relationship of the impacted mandibular third molar to the surrounding anatomic structures using cone beam computed tomography.

• Imaging Science in Dentistry
• /
• 제51권3호
• /
• pp.329-332
• /
• 2021

A markedly enlarged foramen transversarium was discovered incidentally on a cone-beam computed tomography scan of a 72-year-old male patient who was referred for dental implant placement. Further evaluation with magnetic resonance angiography revealed that the foramen enlargement was caused by a tortuosity in the course of the vertebral artery. This case report highlights the importance of recognizing significant incidental findings on diagnostic images and the potential need for additional imaging as part of the complete interpretative process.

• 한국임상수의학회지
• /
• 제20권4호
• /
• pp.523-526
• /
• 2003

Three dimensional computed tomographic images were obtained in two cases with trauma. The first case of a 3 year-old male Maltese, with ataxia and head tilting due to head trauma was referred to veterinary medical teaching hospital, Seoul National University. Remarkable findings were not found on survey radiographs. With the help of three-dimensional reconstruction computed tomographic imaging, parietal and occipital bone fracture was identified. The second case of 4 month-old female Yorkshire terrier with left forelimb lameness was referred right after trauma. Survey radiography showed obvious incongruity of the elbow joint. Lateral and medial condyle of the left humerus fracture and lateral displacement of the left ulna were apparent in three-dimensional computed tomographic image. It was considered that three-dimensional computed tomography could be used as an aid modality for the exact evaluation of extends and degree of fracture as well as planning of orthopedic surgery.

• 한국정밀공학회:학술대회논문집
• /
• 한국정밀공학회 2012년도 추계학술대회 논문집
• /
• pp.697-698
• /
• 2012

• Imaging Science in Dentistry
• /
• 제43권2호
• /
• pp.63-69
• /
• 2013

After over one decade development, cone beam computed tomography (CBCT) has been widely accepted for clinical application in almost every field of dentistry. Meanwhile, the radiation dose of CBCT to patient has also caused broad concern. According to the literature, the effective radiation doses of CBCTs in nowadays market fall into a considerably wide range that is from $19{\mu}Sv$ to $1073{\mu}Sv$ and closely related to the imaging detector, field of view, and voxel sizes used for scanning. To deeply understand the potential risk from CBCT, this report also reviewed the effective doses from literatures on intra-oral radiograph, panoramic radiograph, lateral and posteroanterior cephalometric radiograph, multi-slice CT, and so on. The protection effect of thyroid collar and leaded glasses were also reviewed.