• 대한방사선기술학회지:방사선기술과학
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• 제20권1호
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• pp.29-34
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• 1997

For radiological test in soft tissue or neighboring part with same signal intensity, proper test method and equipment shall be selected as needed. In case of female pelvic cavity, ultrasonography or computed tomography alternatively used, but MRI can be more usefully applied to design treatment method or operation plan by improving the diagnostic accuracy and careful observation of lesion characteristics. Magnetic Resonance Imaging using recently developed Enteral MRI contrast media can acquire more diagnostic information than using only intravenous contrast media. Thus this study attempted to examine the utility of anatomic structure and diagnostic acquisition by imaging the female pelvic cavity using Enteral MRI contrast media. As a result of analyzing magnetic resonance Imaging after administering Enteral MRI contrast media to pelvic cavity suspect patients, more diagnostic information media could be acquired than only using Intravenous contrast. Expecially, in the diagnosis of lesion position, shape, distinction from neighboring tissues it is thought that external Enteral MRI contrast media should be used.

• 대한영상의학회지
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• 제82권2호
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• pp.280-297
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• 2021

간세포암 위험이 있는 환자들에 대해 국제 가이드라인들은 6개월마다 초음파로 감시할 것을 권고하고 있다. 그러나 초음파는 초기 간세포암을 발견하는 데에 낮은 민감도를 보인다. 한편, 자기공명영상(MRI)은 간세포암을 비침습적으로 진단하는 데 중요한 역할을 하지만, 검사 시간이 길고 비용이 높아서 감시 검사로는 적합하지 않다. 따라서 비조영증강 단축 MRI, 역동적 조영증강 단축 MRI, 그리고 간담도기영상을 포함한 단축 MRI 등 다양한 단축 MRI 전략들을 간세포암 감시에 이용한 여러 연구들이 있었다. 이 종설에서는 다양한 단축 MRI 전략들을 살펴보고, 비용-효과적인 측면을 고려하여 간세포암 감시의 앞으로 나아가야 할 방향에 대해 살펴보고자 한다.

• 대한한의학회지
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• 제17권1호
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• pp.171-189
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• 1996

Background and Purpose: The greater part of patients to visit Hospital of Oriental Medicine suffer from cerebrovascular accident(CVA). There is transcranial Doppler(TCD) in the diagnostic method to confirm cerebrovascular accident(CVA). Transcranial Doppler(TCD) is an accurate method of monitoring the blood flow velocities of the cerebral vessels and have been generally used to prevent symptomatic vasospasm and confirm cerebral infarction. So we studied, in the crebrovascular accident(CVA), to estimate whether transcranial Doppler(TCD) is useful to. Methods: Using transcranial doppler(Multigon Model 500M Transcranial Doppler System), we measured the mean and peak velocity and the direction of blood flow in 10 cerebrovascular accident(CVA)'s subjects who had been examined by Computed Tomography(CT) or Magnetic Resonance Imaging (MRI). Results : As an anticipation, in cerebrovascular accident(CVA)'s subject with Cb-infarction, the mean and peak velocity of blood flow fell down remarkably and the direction of blood flow was change or irritable. But didn't find out any signal in lacunar infarction. Also, in case with spontaneous hemorrhage, the velocity and direction of blood flow was change but this signal was short of diagnosis for Cb-hemorrhage. Besides, we found signals about embolism, stenosis, thrombosis and occlusion in cerebrovascular accident(CVA)'s subjects. Conclusion: In Cb-infarction, the result of TCD was equal to diagnosis with Computed Tomography(CT) or Magnetic Resonance Imaging (MRI). But about lacunar infarction or spontaneous hemorrhage, signals of TCD couldn't be found out or was insufficient more than Computed Tomography(CT) or Magnetic Resonance Imaging(MRI). In cerebrovascular accident(CVA)'s subject with embolism, stenosis, thrombosis or occlusion, signals of TCD were found out more than Computed Tomography(CT) or Magnetic Resonance Imaging(MRI). Therefore transcranial doppler(TCD) is necessary method which makes a diagnosis of cerebrovascular accident(CVA), with Computed Tomography(CT) or Magnetic Resonance Imaging(MRI).

• 한국임상수의학회지
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• 제35권5호
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• pp.178-183
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• 2018

The object of this study was to compare magnetic resonance imaging (MRI) findings and neurological signs in canine brain diseases. Brain diseases can cause severe neurological deficits and may be life-threatening. The antemortem diagnosis of the brain diseases is difficult for the clinician, since definitive diagnosis is based upon histopathological confirmation. Brain diseases are often associated with specific clinical signs, signalment, progression, and location. Accurate lesion localization through neurological examination and MRI findings is helpful for developing a differential diagnosis. A retrospective study was performed to compare the neurological examination of dogs with suspected brain disease to the MRI findings. Based on this study, neurological examination is a reliable way to localize most brain lesions. Postural reaction deficits do not provide sufficient information to localize lesions. Additionally, not all brain lesions present clinical signs and inflammatory lesions may cause no detectable abnormalities on MRI. Therefore, in clinical practice, a combination of neurological examination and MRI findings recommended for accurate brain lesion localization.

• 한국통신학회논문지
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• 제39C권6호
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• pp.490-496
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• 2014

무릎 관절 연골은 두께가 얇아 대부분 무릎 질환의 원인이 되고 있다. 그러므로 무릎 자기공명영상에서 관절 연골 분할은 무릎 질환의 정확한 진단을 위한 필수조건이다. 특히 수동이 아닌 전자동 방식으로 무릎 관절 연골을 분할하여야만 효과적인 무릎 질환 진단을 할 수 있다. 본 논문에서는 뇌 자기공명영상에서 대표적으로 사용되는 레벨 셋 기반의 영상 분할 기법을 분석하여 무릎 자기공명영상에 적용 시 문제점을 파악하고 이를 해결함으로써, 무릎 자기공명영상에 레벨 셋 기반 영상분할 방식을 적용하였다. 이는 본 논문에서 제안하는 분할기법을 사용할 경우 무릎 관절 연골 분할에 대한 모든 과정이 전자동화 되어 기존 반자동화 방식보다 빠른 처리가 가능하며, 3차원 형상화를 통해 보다 정확한 진단에 도움을 줄 수 있다. 또한 우리는 제안하고 있는 분할기법이 기존 대표적인 무릎 관절 분할보다 더 높은 정확도를 갖는 것을 실험을 통해 확인할 수 있었다.

• Investigative Magnetic Resonance Imaging
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• 제16권1호
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• pp.1-5
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• 2012

유방 MRI는 유방암의 유방촬영 스크리닝법에 대한 가장 정확한 보완 검사법이다. 아직까지 MRI 스크리닝의 효과에 대한 무작위 대조군연구가 없음에도 불구하고, 현재 미국암학회와 국립 종합암네트워크 (NCCN)에서는 MRI 스크리닝을 유방암 고위험여성에서 권고하고 있다. 국내에서는, 한 후향적 연구에서 유방암 환자의 반대쪽 유방암에 대한 MRI 스크리닝법이 유방촬영술과 초음파에서 발견하지 못한 암을 발견하고 이는 이후 유방암 발병을 감소시킴을 보고하고 있다. 국내에 유방촬영 스크리닝법의 보완법으로 MRI를 도입하기 위해서는 판독의 표준화와 교육, MR 유도하 조직검사법과 적절한 적응증의 확립, 비용-효용성에 대한 평가가 선결되어야 한다.

• Investigative Magnetic Resonance Imaging
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• 제16권2호
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• pp.97-102
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• 2012

고해상도 경동맥 자기공명영상(MRI)을 이용하여 경화판 특성을 파악할 수 있다. MRI는 경화판의 활동성 염증이나 경화판내 출혈을 비침습적으로 진단할 수 있는 능력이 있다. 3T MRI는 1.5T MRI에 비해 신호 대 잡음비와 대조도 대 잡음비가 높다. 동맥벽의 면적이나 표준화된 동맥벽 면적을 MRI로 측정하면 약물 치료 후 반응을 평가할 수 있다. 결론적으로 고행상도 MRI는 일과성 허혈이나 뇌졸중을 발생하기 쉬운 경화판의 진단과 치료 후 평가에 유용하다.

• Journal of Korean Neurosurgical Society
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• 제58권5호
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• pp.479-482
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• 2015

We report a case of a 31-year-old woman with glioblastoma multiforme (GBM) in the pineal region with associated leptomeningeal dissemination and lumbar metastasis. The patient presented with severe headache and vomiting. Magnetic resonance imaging (MRI) of the brain showed a heterogeneously enhanced tumor in the pineal region with obstructive hydrocephalus. After an urgent ventricular-peritoneal shunt, she was treated by subtotal resection and chemotherapy concomitant with radiotherapy. Two months after surgery, MRI showed no changes in the residual tumor but leptomeningeal dissemination surrounding the brainstem. One month later, she exhibited severe lumbago and bilateral leg pain. Thoracico-lumbar MRI showed drop like metastasis in the lumbar region. Finally she died five months after the initial diagnosis. Neurosurgeons should pay attention to GBM in the pineal region, not only as an important differential diagnosis among the pineal tumors, but due to the aggressive features of leptomeningeal dissemination and spinal metastasis.

• Journal of Korean Neurosurgical Society
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• 제42권6호
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• pp.481-483
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• 2007

A 57-year-old man presented with weakness in both legs upon awakening after drinking. Magnetic resonance imaging (MRI) of the lumbar spine did not reveal any intraspinal abnormalities but MRI of the pelvis revealed lesions with abnormal intensities with heterogeneous contrast enhancement in both gluteal muscles. Serum creatine phosphokinase was markedly elevated. A diagnosis of lumbosacral plexopathy, complicating rhabdomyolysis was made. With supportive care he recovered well but mild weakness of the right ankle remained at 6 month-follow-up. Pelvic MRI is a helpful diagnostic tool in localizing rhabdomyolysis. Lumbosacral plexopathy should be included in the differential diagnosis of the such cases, presenting with sudden weakness of legs.

• Journal of Korean Neurosurgical Society
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• 제57권6호
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• pp.487-490
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• 2015

We report a 10-year-old boy with supratentorial cortical ependymoma that rapidly grew in the course of 3 years. He suffered generalized seizures when he was 5 years old; MRI showed a small cortical lesion in the right postcentral gyrus. MRI performed 2 years later revealed no changes. For the next 3 years he was free of seizures. However, at the age of 10 he again suffered generalized seizures and MRI disclosed a large parietal tumor. It was resected totally and he remains free of neurological deficits. The histopathological diagnosis was ependymoma. Pediatric supratentorial cortical ependymomas are extremely rare. We recommend including cortical ependymoma as a differential diagnosis in pediatric patients with cortical mass lesions presenting with seizures and careful follow-up even in the absence of symptoms because these tumors may progress.