• Journal of Magnetics
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• 제21권2호
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• pp.281-285
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• 2016

The purpose of study was to evaluate SNR and CNR with different contrast agent contents (1.0 mmol/mL gadobutrol and 0.5 mmol/mL gadoterate meglumine) for spin echo (SE) and 3-dimension contrast-enhanced fast field echo (3D CE-FFE) pulse sequences. In this study, we compared the SNR and the CNR between 0.5 mmol/mL gadoterate meglumine and 1.0 mmol/mL gadobutrol according to the concentration of contrast agent in brain MRI. When we compared between SE and 3D CE-FFE pulse sequences, the higher SNR and CNR using 3D CE-FFE pulse sequence can be acquire regardless of contrast agent contents. Also, a statistically significant difference was found for SNR and CNR between all protocols. In conclusion, our results demonstrated that the SNR and CNR have not risen proportionately with contrast agent contents. We hope that these results presented in this paper will contribute to decide contrast agent contents for brain MRI.

• Journal of Korean Neurosurgical Society
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• 제42권5호
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• pp.413-415
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• 2007

A 26-year-old man was admitted to our department due to intermittent left hemiparesis for 3 months. Magnetic resonance Image showed subacute infarction in the right precentral gyrus. Digital subtraction angiography and magnetic resonance angiography revealed an aneurysmal protrusion at the right middle cerebral artery (MCA) bifurcation. It was difficult to differentiate the aneurysm from the occlusion of the middle trunk of the MCA trifurcation. Brain single photon emission computerized tomography showed a decrease in perfusion in the right posterior frontal lobe without vascular reserve. Therefore, we planned a superficial temporal artery MCA anastomosis with an exploration of the right MCA bifurcation. Intraoperatively, the aneurysmal opacification on preoperative angiography proved to be the proximal stump of the occluded middle trunk of the MCA trifurcation. An aneurysmal protrusion at the MCA bifurcation does not always indicate an aneurysm. In diagnosing protruding vascular lesions at the MCA bifurcation, the possibility of a vascular stump should be considered according to their angioanatomical appearance and the history of the patient.

• 대한영상의학회지
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• 제81권6호
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• pp.1472-1477
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• 2020

경막 동정맥루는 다양한 증상을 일으킬 수 있는 후천적 혈관 이상이다. Borden I 유형의 S상 정맥동 동정맥 누공이 지주막하 출혈로 나타난 드문 증례를 보고한다. 출혈은 전방 하뇌 소뇌 동맥의 작은 연막 공급 혈관인 측면 연수 교뇌 부분에 있는 측벽 동맥류 파열로 인해 발생하였다. 저자들은 뇌 전산화단층촬영 및 혈관조영술, 자기공명영상 및 혈관조영술 그리고 디지털 감산 혈관조영술을 포함한 영상 소견과 기존의 유사한 증례에 대한 문헌을 검토하고자 한다.

• Tuberculosis and Respiratory Diseases
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• 제51권6호
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• pp.603-608
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• 2001

저자들은 속립성 폐결핵과 연관되어 급성 경과를 보인 결핵성 뇌수막뇌염 환자에서 뇌혈관 자기공명영상으로 혈관염 소견을 확인하고, 스테로이드의 투여와 중단, 재투여에 따라 뇌증의 증세가 뚜렷히 변하는 임상경과, 증상이 호전된 후 추적한 뇌혈관 자기공명영상에서 혈관 영상이 정상화된 것을 확인할 수 있었던 사례를 경험하였기에 문헌고찰과 함께 보고하는 바이다.

• Journal of Korean Neurosurgical Society
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• 제30권1호
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• pp.66-72
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• 2001

Apatient with multiple dissecting aneurysms of a posterior inferior cerebellar artery trunk who presented with SAH is reported. A 58-year-old woman presented with sudden occipital headache, dizziness and vomiting. The intial vertebral angiography revealed a suspicious pearl and string sign at the proximal posterior inferior cerebellar artery(PICA) segment. After 2 weeks, follow up angiography showed a progression of the proximal PICA dissection and newly developed dissecting aneurysm of the distal PICA segment. A far lateral suboccipital transcondylar appoach confirmed two dissecting aneurysms at distant sites of the PICA trunk. The dissection segments were wrapped with muslin wrap, which preserved the flow through the PICA and brain stem perforators. The angiographys at 3 weeks and 6 months after operation revealed serial disappearance of the dissecting aneurysms which is distal to proximal. The diagnosis, course and treatment of the dissecting aneurysms of the PICA are discussed with literature review.

• Journal of Korean Neurosurgical Society
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• 제47권4호
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• pp.310-312
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• 2010

A 51-year-old man presented with a pulsatile scalp mass over the right occipital region, which had increased in size over the previous 1 month. He had no previous history of head trauma. Three-dimensional computed tomography (3D-CT) angiography of the brain revealed a $3.0{\times}1.5\;cm$ occipital artery aneurysm arising from the occipital artery. The occipital artery aneurysm was removed following the ligation of the proximal and distal portion of the occipital artery aneurysm. The histological diagnosis was true aneurysm. To the best of our knowledge, this is the first reported case in the literature.

• Journal of Korean Neurosurgical Society
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• 제55권4호
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• pp.222-225
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• 2014

Traumatic intracranial aneurysms (TICAs) are rare and are associated with high rates of morbidity and mortality. TICAs usually result from head injuries caused by traffic accidents, industrial accidents, or gunshots. We report a traumatic aneurysm of the callosomarginal artery-cortical artery junction arising from a penetrating injury by scissors. A 51-year-old woman was admitted to our hospital after suffering a penetrating injury caused by scissors. Computed tomography (CT) and CT-angiography demonstrated a right orbital roof fracture, subarachnoid hemorrhage, frontal lobe hemorrhage, intraventricular hemorrhage, and a traumatic aneurysm of the right callosomarginal artery-cortical artery junction. We trapped the traumatic aneurysm and repositioned a galeal flap. Postoperative CT showed a small infarction in the left frontal lobe. Follow-up angiography two months later showed no residual aneurysm. We suggest that an aggressive surgical intervention be performed whenever TICA is diagnosed.

• 한국방사선학회논문지
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• 제13권7호
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• pp.961-968
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• 2019

본 연구는 CT를 이용한 뇌혈관 추출 검사에서 이중에너지 기법을 활용하여 각 에너지 준위별 뇌혈관 조영술의 유용성을 평가하였다. 방법은 CT 뇌혈관 조영술을 시행한 환자 15명의 DE 영상과 SE 영상을 대상으로 하였다. 영상의 분석은 MCA, 뇌실직 조직, Background에 ROI를 설정하여 평균값, 표준편차 및 SNR, CNR 값을 구하고, SE영상과 비슷하게 구현되는 에너지 영역을 알아보았다. Likert 5점 척도 육안평가를 병행한 결과 DE 40 keV와 SE 120 kVp에서 가장 선명한 MCA 영상을 확인 하였다(p>0.05). SE영상의 SNR 값은 DE영상의 40 keV에너지 준위값과 비슷하게 측정되었고, 40 keV와 50 keV의 저에너지 준위의 영상이 SNR이 높게 측정되어 고에너지 준위의 영상에 비해 대조도가 높아 뇌혈관질환을 유용하게 관찰할 수 있을 것으로 사료된다.

• 대한영상의학회지
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• 제83권6호
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• pp.1360-1365
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• 2022

Hutchinson-Gilford progeria 증후군(syndrome) (이하 HGPS)은 심혈관 및 뇌혈관 질환의 조기 이환율을 갖는 드문 진행성 조기 노화 증후군이다. 임상증상은 매우 다양하여 성장 부진, 경피증, 탈모증, 골다공증과 같은 비특이적 증상 외에도 가속화된 혈관 노화에 의해 유년기 및 청소년기에 발생하는 고혈압과 심뇌혈관 질환을 포함한다. HGPS 환자에게 자기공명 혈관조영술은 무증상 뇌졸중 또는 혈관 변화를 조기에 진단하고 뇌혈관 질환의 위험성 증가를 평가하기 위해 권장된다. 이 증례 보고는 전형적인 임상 특징을 보인 5세 환아에서 유전자분석으로 확진된 국내 두 번째 HGPS이며, 뇌 자기공명 혈관조영술 소견을 제시한 국내 최초 영문 증례 보고이다.

• Journal of Korean Neurosurgical Society
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• 제50권1호
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• pp.45-47
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• 2011

Abnormal contrast enhancement on brain computed tomography (CT) scan after diagnostic or interventional angiography is not rare, and has known to be induced by temporary blood-brain barrier (BBB) disruption from contrast media. Furthermore, it has been regarded as clinically subtle, but reported to have no symptom or mild transient symptoms. However, we recently experienced two cases of serious BBB disruption during the acute period after coiling of an unruptured intracranial aneurysm. One patient presented with an unruptured paraclinoid internal carotid artery (ICA) aneurysm on the right and the other with an unruptured right supraclinoid ICA aneurysm. Both patients showed similar findings on immediate postembolization CT scan and clinical courses after coiling. Typical radiological, clinical characteristics of BBB disruption were described. In addition, the role of immediate postembolization CT scan are also discussed.