• The korean journal of orthodontics
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• v.26 no.4
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• pp.423-439
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• 1996

The purpose of this study was to evaluate the diagnostic value of $SONOPAK^*$ in internal derangement of TMJ by comparing the spectral analysis data of TMJ sounds recorded by SONOPAK with the results of MRI. From the patients who came to Department of Orthodontics, Seoul National University Dental Hospital for treatment of malocclusion, eighteen adult patients (five males and thirteen females) with TMD symptoms were selected. After joint sounds were checked by a pediatric stethoscope, they were recorded and analyzed by the SONOPAK. The spectral analysis of the SONOPAK provided SONOPAK INTERPRETATION data about the stage of internal derangement, which were compared with the results of MRI. Among the patients whose disc positions were diagnosed as 'normar by MRI, there were no false positive diagnosis by the SONOPAK INTERPRETATION, But in the cases of anterior disc displacements (reducible and/or nonreducible), most of SONOPAK INTERPRETATION data did not coincide with MRI results. In conclusion, it is not adequate to try to differentiate reducible and non-reducible anterior disc displacements on the basis of joint sounds. And it is recommended not to determine the stage of internal derangement according to the nature of sounds. We suggest that the diagnostic value of the SONOPAK will be enhanced when clinicians combine some other informations such as clinical signs/symptoms and other supplementary diagnostic tools), and that more data be incoporated into the SONOPAK INTERPRETATION software.

• Transactions of the Korean Society of Automotive Engineers
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• v.15 no.6
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• pp.9-16
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• 2007

This paper describes the design and implementation of the fault diagnosis on the Electronic Throttle Control(ETC) System. The proposed fault diagnosis consists of an input signal, actuator and a processor diagnosis. The input signal diagnosis can detect the faults of the ETC system's input signals such as the position sensor fault, source voltage fault, load current fault, and desired position fault. The actuator diagnosis is able to detect the actuator fault due to the actuator aging and an obstacle which interfere in the movement of the actuator. The processor diagnosis detects the fault which prevents the microprocessor from operating the ETC software. In order to protect the breakdown of the ETC system and assure the driving safety, appropriate reactions are also proposed according to the detected faults. The safety and reliability of the ETC system can be improved by the proposed fault diagnosis.

• Investigative Magnetic Resonance Imaging
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• v.17 no.1
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• pp.47-49
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• 2013

Endogenous endophthalmitis is rare and refers to an intraocular inflammatory process that may result from exogenous or endogenous causes. Magnetic resonance imaging (MRI) is useful for diagnosing endophthalmitis, and valuable to reach the diagnosis of brain abscess. We report here the MR findings of simultaneously developed endogenous endophthalmitis and brain abscesses.

• Journal of the Korean Orthopaedic Association
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• v.53 no.6
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• pp.540-546
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• 2018

Purpose: The purpose of this study was to suggest a multimodal diagnostic approach to determine the cause of the disease in patients diagnosed with synovitis of the wrist and who underwent synovectomy. Materials and Methods: Twenty-nine patients, who underwent contrast magnetic resonance imaging (MRI) preoperatively and synovectomy from January 2000 to December 2013, were reviewed retrospectively. Among them, 17 patients underwent a $Tc^{99m}$ white blood cell (WBC) scan preoperatively. In patients who met the diagnostic criteria of rheumatoid arthritis (RA), the diagnosis was confirmed as RA if the MRI finding or histology was compatible with RA. If the MRI finding and histology were disparate, the final diagnosis was made based on the histologic finding. Results: Of the nine patients who met the diagnostic criteria of RA, seven patients were finally diagnosed as RA and two patients as tuberculous arthritis. Of the 20 patients who did not meet the diagnostic criteria of RA, the MRI findings and histology were consistent with the same disease in 12 patients. In the remaining eight patients, five were diagnosed with nonspecific chronic synovitis, one with RA, and two with tuberculous arthritis based on the clinical findings, MRI, and histology findings. Conclusion: MRI and a WBC scan are very useful imaging modalities for diagnosing the causative condition of the wrist synovitis. A histology evaluation after synovectomy can also be useful in cases with a difficult diagnosis or are refractory to medications.

• Korean Journal of Biological Psychiatry
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• v.2 no.2
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• pp.169-176
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• 1995

두부 외상은 많은 발생율과 사망율을 차지하고 있으며, 건강한 생활을 위해 큰 관심을 갖게 되었다. 신경방사선영상은 외상성 뇌손상 환자들의 진단과 치료에 필수적인 방법이다. 뇌손상의 기본 기전, 병리, 그리고 영상 소견을 이해 하는 것은 매우 중요하다. 1970년대에 Glasgow coma scale의 형상과 전산화단층촬영(CT)의 발달은 임상의사들이 두부외상에 대한 평가와 환자들의 경과를 예상하는데 극적인 변화를 주었다. 최근 자기공명영상(MRI)의 발달로 외상성 뇌손상의 형태를 더욱 이해 하게 되었고, 두부 외상의 발견율이 높아지게 되었다.

• Proceedings of the KSMRM Conference
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• 2003.10a
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• pp.73-73
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• 2003

목적： 피부조직과 같은 미세 인체구조 연구를 위해 고해상도 3T MRI 시스템에 적합한 고분해능의 RF surface coil을 개발하고 있다. In vivo 연구를 위한 여러 parameter를 최적화하여 기능영상에도 부합된다. 비침습적인 In vivo 검사에 의한 세포수준의 극 미세구조의 연구가 가능해짐으로써 과거 시행하던 침습적인 생검없이 각종질환의 진단적 접근이 병리학적 수준으로 향상되어 질병의 정확한 진단이 가능해지게 될 것이다.

• Proceedings of the KSMRM Conference
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• 2002.11a
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• pp.113-113
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• 2002

목적： 근래에 증가하는 스포츠 손상의 진단에 MRI의 역할은 대단히 중요하다. 각 해부학적 구조물에서 발생하는 흔한 스포츠 손상의 MRI 소견을 전시하여 본다. 대상 및 방법： 지난 5년간 경험한 운동선수의 손상을 뼈와 근육 등의 연조직 손상으로 나누어 대표적인 MRI 증례를 문헌고찰과 함께 살펴보았다.

• Proceedings of the Korean Magnestics Society Conference
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• 2014.11a
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• pp.158-160
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• 2014

• Proceedings of the Korean Institute of Navigation and Port Research Conference
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• 1992.04a
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• pp.13-20
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• 1992

• 건강소식
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• v.9 no.12 s.85
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• pp.16-18
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• 1985

항간에서 유행하는 여러 가지 무분별한 민간요법, 자기진단에 의한 약국에서의 직접 매약행위, 그리고 스스로의 처방에 의한 특수한식이 요법이나, 비생리적인 무리한 운동요법 등은 모두 뇌졸중을 악화시키는 요인이 되기 쉬우므로 삼가야 하겠다.